Method validation is an essential technique for ensuring the reliability and accuracy of an analytical method. This study aimed to optimize and validate a fast, reliable, and accurate method for quantitatively determining pesticide residues of diverse chemical classes in the tomato matrix. Various method performance characteristics were tested and compared with predefined criteria. Twenty-six different pesticides of diverse chemical classes were selected based on their use in tomato cultivation and the availability of reference materials. The pesticide residues in tomato samples were extracted with the QuEChERS technique with some modifications, followed by injection into an LC-MS/MS system operating in an optimized method. The validated method demonstrated reasonable specificity, as there were no interferences from matrix components at the retention times of pesticides. The calibration curves for all pesticides exhibited excellent linearities, with correlation coefficients exceeding 0.99. No significant matrix effect was observed for all pesticides in tomatoes, as the values fell within the range of ±20%. All pesticides were quantified successfully at a concentration of 5 μg/kg except for carbaryl, with an average recovery of more than 70% and a relative standard deviation of less than 20%. Similarly, measurement uncertainties were also estimated based on the validation data, and the values were found below the default limit of 50%. Subsequently, the validated method was applied to analyze 52 locally collected tomato samples. Study findings revealed that only four of the studied pesticides were detected in these samples, and their concentrations were below the maximum residue limits (500 µg/kg each for carbendazim, imidacloprid, and metalaxyl) established for tomatoes by the Government of Nepal and the Codex Alimentarius Commission.
{"title":"Method Validation and Measurement Uncertainty Estimation for Determination of Multiclass Pesticide Residues in Tomato by Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)","authors":"Suraj Shrestha, Bandana Lamichhane, Nibedita Chaudhary","doi":"10.1155/2024/3846392","DOIUrl":"https://doi.org/10.1155/2024/3846392","url":null,"abstract":"Method validation is an essential technique for ensuring the reliability and accuracy of an analytical method. This study aimed to optimize and validate a fast, reliable, and accurate method for quantitatively determining pesticide residues of diverse chemical classes in the tomato matrix. Various method performance characteristics were tested and compared with predefined criteria. Twenty-six different pesticides of diverse chemical classes were selected based on their use in tomato cultivation and the availability of reference materials. The pesticide residues in tomato samples were extracted with the QuEChERS technique with some modifications, followed by injection into an LC-MS/MS system operating in an optimized method. The validated method demonstrated reasonable specificity, as there were no interferences from matrix components at the retention times of pesticides. The calibration curves for all pesticides exhibited excellent linearities, with correlation coefficients exceeding 0.99. No significant matrix effect was observed for all pesticides in tomatoes, as the values fell within the range of ±20%. All pesticides were quantified successfully at a concentration of 5 <i>μ</i>g/kg except for carbaryl, with an average recovery of more than 70% and a relative standard deviation of less than 20%. Similarly, measurement uncertainties were also estimated based on the validation data, and the values were found below the default limit of 50%. Subsequently, the validated method was applied to analyze 52 locally collected tomato samples. Study findings revealed that only four of the studied pesticides were detected in these samples, and their concentrations were below the maximum residue limits (500 <i>µ</i>g/kg each for carbendazim, imidacloprid, and metalaxyl) established for tomatoes by the Government of Nepal and the Codex Alimentarius Commission.","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"12 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139414544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhang Shixiong, Liu Shaowei, Yang Zeqi, Xu Miaochan, Zhou Pingping, Bai Haiyan, Lv Jingjing, Wang Yangang
According to traditional Chinese medicine theory, tongue coatings reflect changes in the body. The goal of this study was to identify a metabolite or a set of metabolites capable of classifying characteristics of traditional Chinese medicine syndromes in erosive gastritis. In this study, we collected tongue coatings of patients with erosive gastritis with damp-heat syndrome (DHS), liver depression and qi stagnation syndrome (LDQSS), and healthy volunteers. Then, we analyzed the differences in metabolic characteristics between the two groups based on metabolomics. We identified 14 potential biomarkers related to the DHS group, and six metabolic pathways were enriched. The differential pathways included pyrimidine metabolism, pantothenate and CoA biosynthesis, citrate cycle (TCA cycle), pyruvate metabolism, glycolysis/gluconeogenesis, and purine metabolism. Similarly, in the LDQSS group, we identified 25 potential biomarkers and 18 metabolic pathways were enriched. The top five pathways were the TCA cycle, sphingolipid metabolism, fatty acid biosynthesis, pantothenate and CoA biosynthesis, and the pentose phosphate pathway. In conclusion, the DHS group and the LDQSS group have different characteristics.
{"title":"Study on the Characteristics of Traditional Chinese Medicine Syndromes in Patients with Erosive Gastritis Based on Metabolomics","authors":"Zhang Shixiong, Liu Shaowei, Yang Zeqi, Xu Miaochan, Zhou Pingping, Bai Haiyan, Lv Jingjing, Wang Yangang","doi":"10.1155/2024/6684677","DOIUrl":"https://doi.org/10.1155/2024/6684677","url":null,"abstract":"According to traditional Chinese medicine theory, tongue coatings reflect changes in the body. The goal of this study was to identify a metabolite or a set of metabolites capable of classifying characteristics of traditional Chinese medicine syndromes in erosive gastritis. In this study, we collected tongue coatings of patients with erosive gastritis with damp-heat syndrome (DHS), liver depression and qi stagnation syndrome (LDQSS), and healthy volunteers. Then, we analyzed the differences in metabolic characteristics between the two groups based on metabolomics. We identified 14 potential biomarkers related to the DHS group, and six metabolic pathways were enriched. The differential pathways included pyrimidine metabolism, pantothenate and CoA biosynthesis, citrate cycle (TCA cycle), pyruvate metabolism, glycolysis/gluconeogenesis, and purine metabolism. Similarly, in the LDQSS group, we identified 25 potential biomarkers and 18 metabolic pathways were enriched. The top five pathways were the TCA cycle, sphingolipid metabolism, fatty acid biosynthesis, pantothenate and CoA biosynthesis, and the pentose phosphate pathway. In conclusion, the DHS group and the LDQSS group have different characteristics.","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"184 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139078948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Favipiravir is a broad-spectrum oral antiviral agent and has been approved for the treatment of COVID-19 infection cases. It inhibits a protein known as RNA polymerase, which transcribes and replicates the viral RNA genome, causing the spread of the infection. The current study aimed to develop and validate a new analytical method utilizing HPLC in accordance with international requirements (ICH and FDA). The chromatographic conditions used to achieve good resolution and reproducibility were a mixture of acetonitrile and 0.1% phosphoric acid buffer in the ratio of 60 : 40 v/v as the mobile phase. The flow rate was 1.0 mL/min, the wavelength (λ) was determined at 250 nm, and a retention time was approximately 3 minutes for favipiravir. The HPLC analysis was performed on the Dionex 300 system equipped with a Phenomenex C8 (250 cm 4.6 mm) 5 μm column. The total runtime was 6.0 min. The findings indicated that the method had been validated satisfactorily. Across the concentration range of 0.10–0.75 mg/ml, the calibration curve revealed a linear relationship. The accuracy of the current method was to be 99.2%. The limit of detection (LOD) and limit of quantification (LOQ) were 0.004 and 0.013 ppm, respectively. The standard and sample solution repeatability tests revealed that the procedure was precise and within acceptable ranges. The RSD% for the determination of precision was <2%. The results for robustness and solution stability were within acceptable limits. Finally, the new method provided an excellent result for all analytical method validation parameters and met the acceptance criteria. In addition, the new approach has a short run time and a retention time of around 4 minutes.
{"title":"Quantitative Analysis of Favipiravir by HPLC: Development and Validation","authors":"Moammal Qurt, Rania Eshtayyeh, Hani Naseef, Abdullah Rabba, Abdallah Damin Abukhalil, Numan Malkieh, Maher Kharouf","doi":"10.1155/2023/8847958","DOIUrl":"https://doi.org/10.1155/2023/8847958","url":null,"abstract":"Favipiravir is a broad-spectrum oral antiviral agent and has been approved for the treatment of COVID-19 infection cases. It inhibits a protein known as RNA polymerase, which transcribes and replicates the viral RNA genome, causing the spread of the infection. The current study aimed to develop and validate a new analytical method utilizing HPLC in accordance with international requirements (ICH and FDA). The chromatographic conditions used to achieve good resolution and reproducibility were a mixture of acetonitrile and 0.1% phosphoric acid buffer in the ratio of 60 : 40 v/v as the mobile phase. The flow rate was 1.0 mL/min, the wavelength (<i>λ</i>) was determined at 250 nm, and a retention time was approximately 3 minutes for favipiravir. The HPLC analysis was performed on the Dionex 300 system equipped with a Phenomenex C8 (250 cm 4.6 mm) 5 <i>μ</i>m column. The total runtime was 6.0 min. The findings indicated that the method had been validated satisfactorily. Across the concentration range of 0.10–0.75 mg/ml, the calibration curve revealed a linear relationship. The accuracy of the current method was to be 99.2%. The limit of detection (LOD) and limit of quantification (LOQ) were 0.004 and 0.013 ppm, respectively. The standard and sample solution repeatability tests revealed that the procedure was precise and within acceptable ranges. The RSD% for the determination of precision was <2%. The results for robustness and solution stability were within acceptable limits. Finally, the new method provided an excellent result for all analytical method validation parameters and met the acceptance criteria. In addition, the new approach has a short run time and a retention time of around 4 minutes.","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"20 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139067430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To establish an objective and comprehensive methodology to analyse the connections and differences between horned gallnut (HG) and bellied gallnut (BG) in Galla Chinensis (GC). The HPLC fingerprints from 15 batches of HG and 15 batches of BG were performed, and chemometric analysis including similarity analysis (SA), hierarchical clustering analysis (HCA), principal component analysis (PCA), and orthogonal partial least squares discrimination analysis (OPLS-DA) was also set up. The results showed that the similarity of all batch samples was more than 0.9. In fingerprint analysis, 8 distinct common peaks were detected, among which gallic acid (GA), 1,3,6-tri-O-galloyl-β-D-glucose (TGG), and 1,2,3,4,6-O-galloyl-D-glucose (PGG) were identified by comparing with the standard compounds. Meanwhile, samples were clearly grouped into two classifications corresponding to HG and BG. This study demonstrated that HPLC fingerprints coupled with chemometric analysis could be applied to discriminate HG and BG and evaluate the qualities of HG and BG rapidly, which provided a certain experimental basis for the selection of GC raw materials and subsequent use.
{"title":"Chemical Fingerprint Analysis and Content Determination of Horned Gallnut and Bellied Gallnut in Galla Chinensis","authors":"Xiaomei Long, Shuang Guo, Jianxing Gu, Lijun Zhang, Haipeng Liu, Yuan Fan, Weibo Wen","doi":"10.1155/2023/8849341","DOIUrl":"https://doi.org/10.1155/2023/8849341","url":null,"abstract":"To establish an objective and comprehensive methodology to analyse the connections and differences between horned gallnut (HG) and bellied gallnut (BG) in Galla Chinensis (GC). The HPLC fingerprints from 15 batches of HG and 15 batches of BG were performed, and chemometric analysis including similarity analysis (SA), hierarchical clustering analysis (HCA), principal component analysis (PCA), and orthogonal partial least squares discrimination analysis (OPLS-DA) was also set up. The results showed that the similarity of all batch samples was more than 0.9. In fingerprint analysis, 8 distinct common peaks were detected, among which gallic acid (GA), 1,3,6-tri-O-galloyl-<i>β</i>-D-glucose (TGG), and 1,2,3,4,6-O-galloyl-D-glucose (PGG) were identified by comparing with the standard compounds. Meanwhile, samples were clearly grouped into two classifications corresponding to HG and BG. This study demonstrated that HPLC fingerprints coupled with chemometric analysis could be applied to discriminate HG and BG and evaluate the qualities of HG and BG rapidly, which provided a certain experimental basis for the selection of GC raw materials and subsequent use.","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"50 1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139067435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Longyan City in Fujian Province is one of China’s top-quality tobacco-producing areas and plays an essential role in local economic development. To determine the correlation between heavy metal content in tobacco leaves and soil factors, soil physical and chemical properties and heavy metal contents of lead, cadmium, and copper in tobacco leaves were measured and analyzed by the correlation regression method. The content of lead, cadmium, and copper in soil was determined using hydrochloric acid extraction-AAS and graphite furnace atomic absorption spectrometry. Inductively coupled plasma-mass spectrometry was used to determine heavy metal in tobacco leaf. The findings revealed that the average concentrations of lead, cadmium, and copper in the soil were 12.1, 0.092, and 3.88 mg/kg, respectively. In contrast, the average levels of lead, cadmium, and copper in tobacco leaves were 2.33, 4.89, and 4.35 mg/kg, respectively. The cadmium enrichment coefficient of 54.3 was higher than lead and copper, indicating a greater health risk. Soil pH value was negatively correlated with lead content in tobacco leaf, while potassium and phosphorus nutrient levels were negatively correlated with copper content. In contrast, a positive correlation was established between the presence of organic matter with cadmium content in tobacco leaves. The prediction models of lead, cadmium, and copper in tobacco leaves can be expressed by the regression equation corresponding to each heavy metal as follows: <span><svg height="14.0004pt" style="vertical-align:-5.3645pt" version="1.1" viewbox="-0.0498162 -8.6359 28.655 14.0004" width="28.655pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"></path></g><g transform="matrix(.0091,0,0,-0.0091,7.111,3.132)"></path></g><g transform="matrix(.0091,0,0,-0.0091,12.234,3.132)"></path></g><g transform="matrix(.013,0,0,-0.013,21.024,0)"></path></g></svg><span></span><svg height="14.0004pt" style="vertical-align:-5.3645pt" version="1.1" viewbox="32.2361838 -8.6359 105.84 14.0004" width="105.84pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,32.286,0)"></path></g><g transform="matrix(.013,0,0,-0.013,38.526,0)"></path></g><g transform="matrix(.013,0,0,-0.013,41.49,0)"></path></g><g transform="matrix(.013,0,0,-0.013,47.731,0)"><use xlink:href="#g113-52"></use></g><g transform="matrix(.013,0,0,-0.013,56.876,0)"></path></g><g transform="matrix(.013,0,0,-0.013,67.413,0)"></path></g><g transform="matrix(.013,0,0,-0.013,73.653,0)"><use xlink:href="#g113-47"></use></g><g transform="matrix(.013,0,0,-0.013,76.617,0)"><use xlink:href="#g113-49"></use></g><g transform="matrix(.013,0,0,-0.013,82.857,0)"><use xlink:href="#g113-49"></use></g><g transform="matrix(.013,0,0,-0.013,89.097,0)"></path></g><g transform="matrix(.013,0,0,-0.013,98.243,0)"></path></g><g transform="matrix(.013,0,0,-0.013,110.954,0)"></path><
{"title":"Effects of Soil Properties on Pb, Cd, and Cu Contents in Tobacco Leaves of Longyan, China, and Their Prediction Models","authors":"Wei Xi, YuanYe Ping, HaiYang Cai, Qian Tan, Chaoyang Liu, Junru Shen, YaWen Zhang","doi":"10.1155/2023/9216995","DOIUrl":"https://doi.org/10.1155/2023/9216995","url":null,"abstract":"Longyan City in Fujian Province is one of China’s top-quality tobacco-producing areas and plays an essential role in local economic development. To determine the correlation between heavy metal content in tobacco leaves and soil factors, soil physical and chemical properties and heavy metal contents of lead, cadmium, and copper in tobacco leaves were measured and analyzed by the correlation regression method. The content of lead, cadmium, and copper in soil was determined using hydrochloric acid extraction-AAS and graphite furnace atomic absorption spectrometry. Inductively coupled plasma-mass spectrometry was used to determine heavy metal in tobacco leaf. The findings revealed that the average concentrations of lead, cadmium, and copper in the soil were 12.1, 0.092, and 3.88 mg/kg, respectively. In contrast, the average levels of lead, cadmium, and copper in tobacco leaves were 2.33, 4.89, and 4.35 mg/kg, respectively. The cadmium enrichment coefficient of 54.3 was higher than lead and copper, indicating a greater health risk. Soil pH value was negatively correlated with lead content in tobacco leaf, while potassium and phosphorus nutrient levels were negatively correlated with copper content. In contrast, a positive correlation was established between the presence of organic matter with cadmium content in tobacco leaves. The prediction models of lead, cadmium, and copper in tobacco leaves can be expressed by the regression equation corresponding to each heavy metal as follows: <span><svg height=\"14.0004pt\" style=\"vertical-align:-5.3645pt\" version=\"1.1\" viewbox=\"-0.0498162 -8.6359 28.655 14.0004\" width=\"28.655pt\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g transform=\"matrix(.013,0,0,-0.013,0,0)\"></path></g><g transform=\"matrix(.0091,0,0,-0.0091,7.111,3.132)\"></path></g><g transform=\"matrix(.0091,0,0,-0.0091,12.234,3.132)\"></path></g><g transform=\"matrix(.013,0,0,-0.013,21.024,0)\"></path></g></svg><span></span><svg height=\"14.0004pt\" style=\"vertical-align:-5.3645pt\" version=\"1.1\" viewbox=\"32.2361838 -8.6359 105.84 14.0004\" width=\"105.84pt\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g transform=\"matrix(.013,0,0,-0.013,32.286,0)\"></path></g><g transform=\"matrix(.013,0,0,-0.013,38.526,0)\"></path></g><g transform=\"matrix(.013,0,0,-0.013,41.49,0)\"></path></g><g transform=\"matrix(.013,0,0,-0.013,47.731,0)\"><use xlink:href=\"#g113-52\"></use></g><g transform=\"matrix(.013,0,0,-0.013,56.876,0)\"></path></g><g transform=\"matrix(.013,0,0,-0.013,67.413,0)\"></path></g><g transform=\"matrix(.013,0,0,-0.013,73.653,0)\"><use xlink:href=\"#g113-47\"></use></g><g transform=\"matrix(.013,0,0,-0.013,76.617,0)\"><use xlink:href=\"#g113-49\"></use></g><g transform=\"matrix(.013,0,0,-0.013,82.857,0)\"><use xlink:href=\"#g113-49\"></use></g><g transform=\"matrix(.013,0,0,-0.013,89.097,0)\"></path></g><g transform=\"matrix(.013,0,0,-0.013,98.243,0)\"></path></g><g transform=\"matrix(.013,0,0,-0.013,110.954,0)\"></path><","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"13 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139054616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A facile and sensitive electrochemical sensor for determining imatinib (IMA) was constructed by modifying a glassy carbon electrode (GCE) with a nanocarbon material, acetylene black (AB). The electrochemical behavior of IMA on the prepared GCE/AB was studied using electrochemical techniques, namely, differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy. The direct determination of IMA by the GCE/AB sensor was accomplished using DPV under optimized conditions. The method verification showed that the oxidation peak current was proportional to the concentrations of IMA in the linear ranges of 0.01–0.5 and 0.5–4 μM, with correlation coefficients of 0.9856 and 0.9946, respectively. The limit of detection of the GCE/AB sensor was 0.15 nM. Moreover, the GCE/AB sensor showed good precision and accuracy. Finally, the GCE/AB sensor was successfully applied to determine IMA in human serum samples, and the recoveries were satisfactory.
{"title":"Facile and Sensitive Acetylene Black-Based Electrochemical Sensor for the Detection of Imatinib","authors":"Shun Li, Qingwu Tian, Xuanming Xu, Chao Xuan, Xiaomin Yang, Shukai Sun, Tingting Zhou","doi":"10.1155/2023/3228470","DOIUrl":"https://doi.org/10.1155/2023/3228470","url":null,"abstract":"A facile and sensitive electrochemical sensor for determining imatinib (IMA) was constructed by modifying a glassy carbon electrode (GCE) with a nanocarbon material, acetylene black (AB). The electrochemical behavior of IMA on the prepared GCE/AB was studied using electrochemical techniques, namely, differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy. The direct determination of IMA by the GCE/AB sensor was accomplished using DPV under optimized conditions. The method verification showed that the oxidation peak current was proportional to the concentrations of IMA in the linear ranges of 0.01–0.5 and 0.5–4 <i>μ</i>M, with correlation coefficients of 0.9856 and 0.9946, respectively. The limit of detection of the GCE/AB sensor was 0.15 nM. Moreover, the GCE/AB sensor showed good precision and accuracy. Finally, the GCE/AB sensor was successfully applied to determine IMA in human serum samples, and the recoveries were satisfactory.","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"11 3 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138534436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-29eCollection Date: 2023-01-01DOI: 10.1155/2023/9863810
International Journal Of Analytical Chemistry
[This retracts the article DOI: 10.1155/2022/8715211.].
[本文撤回文章 DOI：10.1155/2022/8715211.]。
{"title":"Retracted: Application of 3D Printing Technology and Porous Nano-Ceramic Decorative Sheet in Interior Landscape Design.","authors":"International Journal Of Analytical Chemistry","doi":"10.1155/2023/9863810","DOIUrl":"https://doi.org/10.1155/2023/9863810","url":null,"abstract":"<p><p>[This retracts the article DOI: 10.1155/2022/8715211.].</p>","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"2023 ","pages":"9863810"},"PeriodicalIF":1.8,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10701023/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138795693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-29eCollection Date: 2023-01-01DOI: 10.1155/2023/9849345
International Journal Of Analytical Chemistry
[This retracts the article DOI: 10.1155/2022/4173886.].
[本文撤消了文章 DOI：10.1155/2022/4173886.]。
{"title":"Retracted: Extraction and Dyeing Techniques of Traditional Vegetable Dyestuffs.","authors":"International Journal Of Analytical Chemistry","doi":"10.1155/2023/9849345","DOIUrl":"https://doi.org/10.1155/2023/9849345","url":null,"abstract":"<p><p>[This retracts the article DOI: 10.1155/2022/4173886.].</p>","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"2023 ","pages":"9849345"},"PeriodicalIF":1.8,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10701048/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138795711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-29eCollection Date: 2023-01-01DOI: 10.1155/2023/9864120
International Journal Of Analytical Chemistry
[This retracts the article DOI: 10.1155/2022/9593268.].
[本文撤回了文章 DOI：10.1155/2022/9593268]。
{"title":"Retracted: Application of Calcium-Based Nanomaterials in Art Sculpture Reinforcement Technology.","authors":"International Journal Of Analytical Chemistry","doi":"10.1155/2023/9864120","DOIUrl":"https://doi.org/10.1155/2023/9864120","url":null,"abstract":"<p><p>[This retracts the article DOI: 10.1155/2022/9593268.].</p>","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"2023 ","pages":"9864120"},"PeriodicalIF":1.8,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10701074/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138795776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-29eCollection Date: 2023-01-01DOI: 10.1155/2023/9832943
International Journal Of Analytical Chemistry
[This retracts the article DOI: 10.1155/2022/7463817.].
[此文撤消了文章 DOI：10.1155/2022/7463817.]。
{"title":"Retracted: Research on Nanoeffect of Penetration and Consolidation under Nonlinear Characteristics of Saturated Soft Clay.","authors":"International Journal Of Analytical Chemistry","doi":"10.1155/2023/9832943","DOIUrl":"https://doi.org/10.1155/2023/9832943","url":null,"abstract":"<p><p>[This retracts the article DOI: 10.1155/2022/7463817.].</p>","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"2023 ","pages":"9832943"},"PeriodicalIF":1.8,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10700965/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138796090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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