Pub Date : 2025-01-01DOI: 10.21577/0100-4042.20250109
Nan Li, Peng Sun, Xue Yang
A novel pretreatment method ionic liquid-based dispersive liquid-liquid microextraction followed by high-performance liquid chromatography (HPLC) was established and applied in the analysis of silychristin, silydianin, silybin, silybin B, isosilybin A, isosilybin B in Silybum marianum. The critical parameters affecting dispersive liquid-liquid micro-extraction (DLLME), including selection of dispersive solvent and extraction solvent, volume of dispersive solvent and extraction solvent, adjustment of pH, salt concentration, extraction time, were investigated by single factor study. Under optimum conditions, all of the target analytes presented good linearity (r > 0.9991) and satisfied recoveries (recoveries > 89.5%, relative standard deviation (RSD) < 4.6%). The limits of detection and quantification were 0.16 to 0.74 ng kg–1 and 0.42 to 2.52 ng kg–1, respectively. The developed method is sensitive, rapid, accurate and employable to simultaneously determine six target compounds in Silybum marianum.
建立了离子液体分散液液微萃取-高效液相色谱（HPLC）预处理方法，并应用于水飞蓟中水飞蓟素、水飞蓟素、水飞蓟宾、水飞蓟宾B、异水飞蓟宾A、异水飞蓟宾B的分析。采用单因素法研究了影响分散液液微萃取（DLLME）工艺的关键参数，包括分散溶剂和萃取溶剂的选择、分散溶剂和萃取溶剂的体积、pH的调节、盐浓度、萃取时间等。在最佳条件下，所有目标分析物均具有良好的线性关系（r > 0.9991），加样回收率为89.5%，相对标准偏差（RSD）为4.6%。检测限和定量限分别为0.16 ~ 0.74 ng kg-1和0.42 ~ 2.52 ng kg-1。该方法灵敏、快速、准确，可同时测定水飞蓟中6种目标化合物。
{"title":"IONIC LIQUID-BASED DISPERSIVE LIQUID-LIQUID MICROEXTRACTION FOLLOWED BY HPLC FOR THE DETERMINATION OF SIX EFFECTIVE COMPOSITION OF Silybum marianum","authors":"Nan Li, Peng Sun, Xue Yang","doi":"10.21577/0100-4042.20250109","DOIUrl":"https://doi.org/10.21577/0100-4042.20250109","url":null,"abstract":"A novel pretreatment method ionic liquid-based dispersive liquid-liquid microextraction followed by high-performance liquid chromatography (HPLC) was established and applied in the analysis of silychristin, silydianin, silybin, silybin B, isosilybin A, isosilybin B in Silybum marianum. The critical parameters affecting dispersive liquid-liquid micro-extraction (DLLME), including selection of dispersive solvent and extraction solvent, volume of dispersive solvent and extraction solvent, adjustment of pH, salt concentration, extraction time, were investigated by single factor study. Under optimum conditions, all of the target analytes presented good linearity (r > 0.9991) and satisfied recoveries (recoveries > 89.5%, relative standard deviation (RSD) < 4.6%). The limits of detection and quantification were 0.16 to 0.74 ng kg–1 and 0.42 to 2.52 ng kg–1, respectively. The developed method is sensitive, rapid, accurate and employable to simultaneously determine six target compounds in Silybum marianum.","PeriodicalId":20939,"journal":{"name":"Química Nova","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147331717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-27DOI: 10.21577/0100-4042.20230061
A. Flacker, Cristina B. Adamo, Salomão M. da Silva, Michele O. Silva, Melissa Mederos, R. C. Teixeira
The morphology and adhesion strength of the autocatalytic electroless nickel phosphorus (Ni-P) film, deposited at 40 ºC on polished alumina (Al 2 O 3 99.6%) substrate, pretreated by sulfur/nitric solution, sensitizing with acid stannous chloride and activated using palladium chloride solutions, was studied using contact angle (CA), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), mechanical profilometer (DekTak), and direct laser writer (“maskless lithography”). The results showed that after treatment of the polished Al 2 O 3 substrate, it presented a high performance in the electroless deposition of Ni-P thin-film at low temperature (40 ºC). It was obtained a more compact and continuous film, with small grain size and strong adherence.
在 40 ºC 下沉积在抛光氧化铝（Al 2 O 3 99.研究使用了接触角 (CA)、扫描电子显微镜 (SEM)、能量色散光谱 (EDS)、机械轮廓仪 (DekTak) 和直接激光写入器（"无掩模光刻"）。结果表明，经过处理的抛光 Al 2 O 3 基底在低温（40 ºC）下无电沉积 Ni-P 薄膜时表现出很高的性能。获得的薄膜更紧凑、更连续，晶粒更小，附着力更强。
{"title":"WET TREATMENT AND THE BEHAVIOR OF ELECTROLESS Ni-P DEPOSITION AT 40 °C ON POLISHED ALUMINA","authors":"A. Flacker, Cristina B. Adamo, Salomão M. da Silva, Michele O. Silva, Melissa Mederos, R. C. Teixeira","doi":"10.21577/0100-4042.20230061","DOIUrl":"https://doi.org/10.21577/0100-4042.20230061","url":null,"abstract":"The morphology and adhesion strength of the autocatalytic electroless nickel phosphorus (Ni-P) film, deposited at 40 ºC on polished alumina (Al 2 O 3 99.6%) substrate, pretreated by sulfur/nitric solution, sensitizing with acid stannous chloride and activated using palladium chloride solutions, was studied using contact angle (CA), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), mechanical profilometer (DekTak), and direct laser writer (“maskless lithography”). The results showed that after treatment of the polished Al 2 O 3 substrate, it presented a high performance in the electroless deposition of Ni-P thin-film at low temperature (40 ºC). It was obtained a more compact and continuous film, with small grain size and strong adherence.","PeriodicalId":20939,"journal":{"name":"Química Nova","volume":"164 1","pages":"854 - 859"},"PeriodicalIF":0.0,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139312397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21577/0100-4042.20230119
Giovanna Machado, Jorge David, Nelson Morgon
{"title":"PANORAMA ATUAL E PERSPECTIVAS PARA 2024","authors":"Giovanna Machado, Jorge David, Nelson Morgon","doi":"10.21577/0100-4042.20230119","DOIUrl":"https://doi.org/10.21577/0100-4042.20230119","url":null,"abstract":"","PeriodicalId":20939,"journal":{"name":"Química Nova","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135362633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21577/0100-4042.20230108
Giovanna Machado, Jorge David, Nelson Morgon
{"title":"OS DESAFIOS ENFRENTADOS PELOS EDITORES DE PERIÓDICOS CIENTÍFICOS: PLÁGIO E PRODUÇÃO DE PESQUISA FALSA","authors":"Giovanna Machado, Jorge David, Nelson Morgon","doi":"10.21577/0100-4042.20230108","DOIUrl":"https://doi.org/10.21577/0100-4042.20230108","url":null,"abstract":"","PeriodicalId":20939,"journal":{"name":"Química Nova","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136007868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-01DOI: 10.21577/0100-4042.20170524
A. Rossin, Évelin Lemos de Oliveira, Flavia Amanda Pedroso de Moraes, R. C. D. S. Junior, D. Scheidt, Wilker Caetano, Noboru Hioka, D. Dragunski
{"title":"China sucata de metal de alta qualidade best selling Fabricante da enfardadeira","authors":"A. Rossin, Évelin Lemos de Oliveira, Flavia Amanda Pedroso de Moraes, R. C. D. S. Junior, D. Scheidt, Wilker Caetano, Noboru Hioka, D. Dragunski","doi":"10.21577/0100-4042.20170524","DOIUrl":"https://doi.org/10.21577/0100-4042.20170524","url":null,"abstract":"","PeriodicalId":20939,"journal":{"name":"Química Nova","volume":"61 43","pages":"613-622"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141207757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-01DOI: 10.21577/0100-4042.20170524
A. Rossin, Évelin Lemos de Oliveira, Flavia Amanda Pedroso de Moraes, R. C. D. S. Junior, D. Scheidt, Wilker Caetano, Noboru Hioka, D. Dragunski
{"title":"China sucata de metal de alta qualidade best selling Fabricante da enfardadeira","authors":"A. Rossin, Évelin Lemos de Oliveira, Flavia Amanda Pedroso de Moraes, R. C. D. S. Junior, D. Scheidt, Wilker Caetano, Noboru Hioka, D. Dragunski","doi":"10.21577/0100-4042.20170524","DOIUrl":"https://doi.org/10.21577/0100-4042.20170524","url":null,"abstract":"","PeriodicalId":20939,"journal":{"name":"Química Nova","volume":"38 13","pages":"613-622"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141207428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-01DOI: 10.21577/0100-4042.20170524
A. Rossin, Évelin Lemos de Oliveira, Flavia Amanda Pedroso de Moraes, R. C. D. S. Junior, D. Scheidt, Wilker Caetano, Noboru Hioka, D. Dragunski
{"title":"China sucata de metal de alta qualidade best selling Fabricante da enfardadeira","authors":"A. Rossin, Évelin Lemos de Oliveira, Flavia Amanda Pedroso de Moraes, R. C. D. S. Junior, D. Scheidt, Wilker Caetano, Noboru Hioka, D. Dragunski","doi":"10.21577/0100-4042.20170524","DOIUrl":"https://doi.org/10.21577/0100-4042.20170524","url":null,"abstract":"","PeriodicalId":20939,"journal":{"name":"Química Nova","volume":"53 4","pages":"613-622"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141208129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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