Journal of chromatography open最新文献_第3页

Use of a deep eutectic solvent-assisted matrix solid-phase dispersion extraction for phenolic compounds determination from pigmented wheat 用深共晶溶剂辅助基质固相分散萃取法测定色素小麦中酚类化合物

IF 3.2

Journal of chromatography open

Pub Date : 2025-11-01 DOI: 10.1016/j.jcoa.2025.100282

Susanna Della Posta, Vittoria Terrigno, Maria Chiara Frondaroli, Laura De Gara, Chiara Fanali

In this study, an innovative extraction method for the determination of phenolic compounds in pigmented wheat was developed and optimized. Using deep eutectic solvents (DESs), a greener alternative extraction procedure is offered to the conventional ones based on organic solvents. A matrix solid-phase dispersion (MSPD) extraction was performed and enhanced by the addition of DES in the homogenization step. In comparison with an ultrasound-assisted solid liquid extraction, the MSPD-DES technique allowed to obtain a higher extraction efficiency reducing organic solvent consumption and environmental impact. Although different DESs were tested, the one based on choline chloride and glycerol (1:2 molar ratio) showed the best extraction yield of phenolic compounds. A three-level four-factor Box-Behnken design optimization was performed: sample-to-dispersing material ratio, DES volume, extraction solvent volume, and number of cycles were evaluated. Under the optimal conditions a total phenolic content (TPC) of 3.562 ± 0.005 mg GAE/g was achieved. The AGREEprep, BAGI, and ComplexMoGAPI indicators confirmed the environmental sustainability of the proposed methodology. The qualitative profile of the extracted phenolic compounds was determined using high-performance liquid chromatography-photodiode array detector.

本研究建立并优化了色素小麦中酚类化合物的提取方法。利用深共晶溶剂（DESs），为传统的有机溶剂萃取提供了一种更环保的替代方法。采用基质固相分散（MSPD）萃取，并通过在均质步骤中加入DES增强萃取效果。与超声辅助固液萃取相比，MSPD-DES技术可以获得更高的萃取效率，减少有机溶剂的消耗和对环境的影响。虽然采用了不同的DESs，但氯化胆碱与甘油（1:2摩尔比）的DESs对酚类化合物的提取率最高。采用三水平四因素Box-Behnken设计优化：评估样品与分散物比、DES体积、萃取溶剂体积和循环次数。在最佳条件下，总酚含量（TPC）为3.562±0.005 mg GAE/g。AGREEprep、BAGI和ComplexMoGAPI指标证实了拟议方法的环境可持续性。采用高效液相色谱-光电二极管阵列检测器对提取的酚类化合物进行定性分析。

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引用次数: 0

Recent advances in green chromatography techniques for natural product analysis 天然产物绿色色谱分析技术的最新进展

IF 3.2

Journal of chromatography open

Pub Date : 2025-11-01 DOI: 10.1016/j.jcoa.2025.100284

Şeyda Yayla , Ahmet Cetinkaya , M․Mesud Hurkul , Sibel A. Ozkan

New developments in green chromatography (GrCh) techniques have helped scientists to study natural products. These developments have done two important things. First, they have made it possible to align analytical methods with sustainability and environmental safety principles. At the same time, accurate and reliable traditional chromatography methods are often heavily reliant on toxic organic solvents and energy-intensive procedures, with ecological and health risks being posed as a result. To address these concerns, researchers have developed various environmentally friendly approaches that reduce solvent consumption, waste generation, and energy demand. One of the most significant advancements is Supercritical Fluid Chromatography (SFC), which utilises carbon dioxide as a non-toxic and reusable mobile phase, greatly minimising the use of harmful solvents. The popularity of Micellar Liquid Chromatography (MLC) and High-Performance Thin Layer Chromatography (HPTLC) has grown thanks to their ability to minimise solvent use and provide miniaturised and efficient separations. Natural Deep Eutectic Solvents (NADES) are emerging as green alternatives for extraction and sample preparation, offering biodegradability and low toxicity.

Additionally, microextraction techniques are being used to reduce both solvent and sample volume requirements. Examples of microextraction techniques include Solid Phase Microextraction (SPME) and Liquid Phase Microextraction (LPME). The combination of online extraction and real-time detection systems increases the amount of analysis done while protecting the environment. These GrCh strategies hold great promise. They are suitable for the qualitative and quantitative analysis of plant-derived compounds. Examples of these compounds include flavonoids, alkaloids, terpenes, and phenolics. These methods provide high analytical performance with a lower ecological footprint when used in conjunction with advanced detection systems such as LC-MS/MS and GC–MS under optimised, environmentally friendly conditions. Overall, the way is paved for more responsible and sustainable practices in natural product research by GrCh.

绿色色谱（GrCh）技术的新发展帮助科学家研究天然产物。这些发展成就了两件重要的事情。首先，它们使分析方法与可持续性和环境安全原则保持一致成为可能。与此同时，准确可靠的传统色谱方法往往严重依赖有毒有机溶剂和能源密集型程序，从而带来生态和健康风险。为了解决这些问题，研究人员开发了各种环保方法，以减少溶剂消耗、废物产生和能源需求。最重要的进步之一是超临界流体色谱（SFC），它利用二氧化碳作为无毒和可重复使用的流动相，极大地减少了有害溶剂的使用。胶束液相色谱法（MLC）和高性能薄层色谱法（HPTLC）的普及得益于它们能够最大限度地减少溶剂的使用，并提供小型化和高效的分离。天然深共晶溶剂（NADES）具有生物可降解性和低毒性，正在成为萃取和样品制备的绿色替代品。此外，微萃取技术正在用于减少溶剂和样品体积的要求。微萃取技术的例子包括固相微萃取（SPME）和液相微萃取（LPME）。在线提取和实时检测系统的结合增加了分析量，同时保护了环境。这些GrCh策略大有希望。它们适用于植物源性化合物的定性和定量分析。这些化合物的例子包括类黄酮、生物碱、萜烯和酚类物质。这些方法与先进的检测系统（如LC-MS/MS和GC-MS）在优化的环境友好条件下结合使用时，具有较高的分析性能和较低的生态足迹。总的来说，GrCh在天然产品研究中为更负责任和可持续的实践铺平了道路。

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引用次数: 0

Editorial on “Tutorial 2024” virtual special issue 《2024教程》虚拟特刊社论

IF 3.2

Journal of chromatography open

Pub Date : 2025-11-01 DOI: 10.1016/j.jcoa.2025.100237

Sanka N. Atapattu

引用次数: 0

Development of a simultaneous pesticide analysis method for herbal medicines using a modified extraction procedure and ultrahigh-performance liquid chromatography tandem mass spectrometry 采用改进的提取工艺和超高效液相色谱串联质谱法建立中草药农药同时分析方法

IF 3.2

Journal of chromatography open

Pub Date : 2025-11-01 DOI: 10.1016/j.jcoa.2025.100281

Yeojin Yoon, Eunseong Jo, Jinchul Kim, Yong Beom Cho, Kyu-Heon Kim, Ji-Young Park, Seong Mi Lee, InYeong Hwang, Jonghwan Kim, Jinhee Hwang

Owing to complex matrix interference and low analyte concentrations, pesticide residues in herbal medicines pose considerable health and environmental risks. In this study, a modified QuEChERS protocol combined with ultra-high-performance liquid chromatography–tandem mass spectrometry was developed for the simultaneous determination of 239 pesticides in six widely used herbal medicines. Extraction was performed using MeCN/EtOAc (7:3, v/v) acidified with 0.1 % formic acid to enhance the recovery of both acidic and neutral compounds, followed by dispersive SPE cleanup using 150 mg of MgSO₄ and 25 mg of C₁₈ to reduce matrix effects. Chromatographic separation was performed on a C₁₈ column using a gradient of water and methanol (both containing 5 mM ammonium formate and 0.1 % formic acid), and sensitive MRM detection was achieved using electrospray ionization with positive/negative polarity switching. Method validation was conducted using Paeoniae Radix, Cnidii Rhizoma, Rehmanniae Radix, Corni Fructus, Artemisiae Argyi Folium, and Carthami Flos, following the European Commission SANTE/2020/12,830 guidance. For over 90 % of pesticides, calibration curves exhibited R² > 0.99, and recoveries ranged from 70 to 120 % with RSD < 20 %. Thus, the proposed method is rapid, facile, reliable, and effective for analyzing pesticide residues in diverse herbal medicines.

由于复杂的基质干扰和较低的分析物浓度，草药中的农药残留对健康和环境构成相当大的风险。本研究建立了一种改进的QuEChERS -超高效液相色谱-串联质谱联用方法，用于6种常用中草药中239种农药的同时测定。用0.1%甲酸酸化的MeCN/EtOAc （7:3, v/v）进行萃取，以提高酸性和中性化合物的回收率，然后用150 mg MgSO4和25 mg C18进行分散SPE净化，以减少基质效应。在C18色谱柱上使用水和甲醇梯度（均含有5 mM甲酸铵和0.1%甲酸）进行色谱分离，并使用具有正/负极性切换的电喷雾电离实现敏感的MRM检测。采用芍药、蛇床子、地黄、山茱萸、艾叶和红花，按照欧盟委员会SANTE/2020/ 12830指南进行方法验证。对90%以上的农药，其校准曲线为R²>； 0.99，回收率为70% ~ 120%，RSD < 20%。该方法快速、简便、可靠、有效，可用于多种中草药中农药残留的分析。

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引用次数: 0

Method for the simultaneous enantioselective analysis of 21 natural amino acids and its application to analytics of fluorenylmethoxycarbonyl-derivatives under liquid chromatography conditions 21种天然氨基酸同时对映选择分析方法及其在液相色谱条件下分析氟酰甲氧羰基衍生物中的应用

IF 3.2

Journal of chromatography open

Pub Date : 2025-11-01 DOI: 10.1016/j.jcoa.2025.100286

Antoine Falatas, Nicolas Hausser, Léa Kinderstuth, Mireille Schaeffer, Pilar Franco

The aim of this short communication is to show effective solutions for the control of enantiomeric excess simultaneously on free and protected amino acids (AAs). Such development has interest in the easy implementation of QC control of raw materials in peptide synthesis. Enantiomeric purity of Fmoc-l-AAs (containing fluorenylmethoxycarbonyl amine protecting group) is controlled on a routine base to determine the content of the Fmoc d-counterpart which can be present as impurity. However, the current analytical methods do not allow the simultaneous determination of potential unprotected l- and d-AAs which can be also present as impurities (in the same sample). The analytical conditions described in this publication were specifically achieved on a single ionic chiral column offering enantiomeric selectivity for free AAs derivatized with AQC (6-aminoquinolyl-N-hydroxysuccinimidyl carbamate) and for Fmoc-protected AAs. Only Fmoc-Proline quality control required the use of a different column, but with a similar mobile phase. The proposed methods enable both total and enantioselective AA quantification in a single chromatographic run. The workflow includes pre-column derivatization of the free AAs and optimization of chromatographic conditions for both derivatized and protected AA versions to be resolved in their enantiomeric forms in the same run. Representative results for the resolution of 21 AAs as AQC-derivatives are shown along with their retention behaviour. Subsequently, the analysis of every Fmoc-AA with their protected and unprotected chiral impurities is presented. The methods provide high resolution and selectivity as well as good reproducibility, which will facilitate efficient AAs profiling in diverse matrices.

本文的目的是为同时控制游离氨基酸和受保护氨基酸对映体过量提供有效的解决方案。这样的发展对多肽合成过程中原料的质量控制的容易实施感兴趣。在常规基础上控制Fmoc-l- aas（含氟酰甲氧羰基胺保护基）的对映体纯度，以确定可作为杂质存在的Fmoc- d对应物的含量。然而，目前的分析方法不允许同时测定潜在的未保护的l-和d- aa，它们也可以作为杂质存在（在同一样品中）。本出版物中描述的分析条件是在单离子手性柱上实现的，该柱为AQC（6-氨基喹啉- n -羟基琥珀酰氨基甲酸酯）衍生的游离原子吸收剂和fmoc保护的原子吸收剂提供对映体选择性。只有fmoc -脯氨酸质量控制需要使用不同的色谱柱，但具有相似的流动相。所提出的方法能够在单次色谱运行中进行总AA和对映选择性AA定量。工作流程包括游离AA的柱前衍生化和衍生化和保护AA版本的色谱条件优化，以便在同一运行中以其对映体形式进行解析。给出了21种AAs作为aqc衍生物的代表性结果及其保留行为。随后，分析了每种Fmoc-AA及其受保护和未受保护的手性杂质。该方法具有高分辨率、高选择性和良好的重现性，有助于在不同基质中进行高效的原子吸收光谱分析。

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引用次数: 0

Predicting enantioseparations on polysaccharide-based stationary phases using achiral and chiral molecular descriptors 利用非手性和手性分子描述符预测多糖基固定相的对映体分离

IF 3.2

Journal of chromatography open

Pub Date : 2025-11-01 DOI: 10.1016/j.jcoa.2025.100279

Pieter De Gauquier , Jordy Peeters , Fardine Ameli , Emmanuelle Lipka , Kenno Vanommeslaeghe , Yvan Vander Heyden , Debby Mangelings

Achiral and chiral molecular descriptors were used to build models that predict the global retention of chiral molecules on the one hand, and their enantioselectivity, separation and elution sequence on the other. Chromatographic separations of 48 structurally diverse molecules were performed on six polysaccharide-based chiral stationary phases (CSPs) with two mobile phases (i.e. twelve chromatographic systems). Subsequently, “achiral” and “chiral” models were constructed. For the achiral models, either the mean retention time of the enantiomers (

\overline{t_{R}}

) or the logarithm of the mean retention factor (log

\bar{k}

) was modelled as a function of achiral descriptors, whereas for chiral models, the enantioselectivity was modelled using “Ensemble Steric and Electrostatic Chirality” (ESEC) descriptors. Initially, various types of ESEC descriptors were used to create models. A variable reduction technique, known as the Variable - Wootton, Sergent, Phan-Tan-Luu’s (V-WSP) algorithm, was applied to discard highly correlated descriptors. Stepwise multiple linear regression was applied to build the models. The achiral models for log

\bar{k}

predicted the global retention rather well. For the enantioselectivity, separation and elution sequence, chiral models with good performance parameters and predictive abilities were obtained. Finally, the results from the achiral and chiral models were combined to predict the retention times of individual enantiomers. Predicted chromatograms were generated, to visualize both the expected and experimental separation. In most cases, the combined models yielded a moderate error (median relative error ranged from 5.8% to 22% across all systems) for the individual enantiomers.

利用非手性和手性分子描述符建立模型，一方面预测手性分子的整体保留，另一方面预测手性分子的对映选择性、分离和洗脱序列。采用6个多糖手性固定相（CSPs）和2个流动相（即12个色谱系统）对48个结构多样的分子进行了色谱分离。随后分别构建了“非手性”和“手性”模型。对于非手性模型，无论是对映体的平均保留时间（tR）或平均保留系数（log k¯）的对数被建模为非手性描述符的函数，而对于手性模型，对映体选择性是使用“集合立体和静电手性”（ESEC）描述符建模。最初，使用各种类型的ESEC描述符来创建模型。变量约简技术，被称为变量- Wootton， Sergent, Phan-Tan-Luu （V-WSP）算法，被用于丢弃高度相关的描述符。采用逐步多元线性回归建立模型。log k¯的非手性模型很好地预测了全局保留率。对于对映体选择性、分离和洗脱顺序，获得了具有良好性能参数和预测能力的手性模型。最后，结合非手性模型和手性模型的结果，预测了单个对映体的保留时间。生成预测色谱图，以可视化预期和实验分离。在大多数情况下，组合模型对单个对映体产生中等误差（所有系统的中位相对误差范围为5.8%至22%）。

{"title":"Predicting enantioseparations on polysaccharide-based stationary phases using achiral and chiral molecular descriptors","authors":"Pieter De Gauquier , Jordy Peeters , Fardine Ameli , Emmanuelle Lipka , Kenno Vanommeslaeghe , Yvan Vander Heyden , Debby Mangelings","doi":"10.1016/j.jcoa.2025.100279","DOIUrl":"10.1016/j.jcoa.2025.100279","url":null,"abstract":"<div><div>Achiral and chiral molecular descriptors were used to build models that predict the global retention of chiral molecules on the one hand, and their enantioselectivity, separation and elution sequence on the other. Chromatographic separations of 48 structurally diverse molecules were performed on six polysaccharide-based chiral stationary phases (CSPs) with two mobile phases (i.e. twelve chromatographic systems). Subsequently, “achiral” and “chiral” models were constructed. For the achiral models, either the mean retention time of the enantiomers (<span><math><mover><mrow><msub><mi>t</mi><mi>R</mi></msub></mrow><mo>‾</mo></mover></math></span>) or the logarithm of the mean retention factor (log <span><math><mover><mi>k</mi><mo>¯</mo></mover></math></span>) was modelled as a function of achiral descriptors, whereas for chiral models, the enantioselectivity was modelled using “Ensemble Steric and Electrostatic Chirality” (ESEC) descriptors. Initially, various types of ESEC descriptors were used to create models. A variable reduction technique, known as the Variable - Wootton, Sergent, Phan-Tan-Luu’s (V-WSP) algorithm, was applied to discard highly correlated descriptors. Stepwise multiple linear regression was applied to build the models. The achiral models for log <span><math><mover><mi>k</mi><mo>¯</mo></mover></math></span> predicted the global retention rather well. For the enantioselectivity, separation and elution sequence, chiral models with good performance parameters and predictive abilities were obtained. Finally, the results from the achiral and chiral models were combined to predict the retention times of individual enantiomers. Predicted chromatograms were generated, to visualize both the expected and experimental separation. In most cases, the combined models yielded a moderate error (median relative error ranged from 5.8% to 22% across all systems) for the individual enantiomers.</div></div>","PeriodicalId":93576,"journal":{"name":"Journal of chromatography open","volume":"8 ","pages":"Article 100279"},"PeriodicalIF":3.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145473832","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}

引用次数: 0

Corrigendum to “From multimodal liquid chromatography to supercritical fluid chromatography: Mapping chiral separation of the major organic ultraviolet filters” [J. Chromatogr. Open 8 (2025) 100251] 从多模态液相色谱到超临界流体色谱：绘制主要有机紫外线过滤器的手性分离图[J]。Chromatogr。第8期（2025）100251]

IF 3.2

Journal of chromatography open

Pub Date : 2025-11-01 DOI: 10.1016/j.jcoa.2025.100283

Leandro Oka-Duarte , Giovanni S. Baviera , Weston J. Umstead , Quezia B. Cass , Anderson R.M. de Oliveira

引用次数: 0

Rapid screening and identification of influenza virus polymerase inhibitors from Rubus idaeus L. by at-line nanofractionation 在线纳米分离快速筛选和鉴定小蠊流感病毒聚合酶抑制剂

IF 3.2

Journal of chromatography open

Pub Date : 2025-11-01 DOI: 10.1016/j.jcoa.2025.100278

Zhixu Chen , Rongkai Gu , Mingming Zhao , Kefeng Linghu , Huanwei Fan , Tingting Zhang , Jincai Wang , Zhengjin Jiang

The N-terminal region of the polymerase subunit (PAN) is considered as the most promising target for the development of broad-spectrum antivirals, since it is highly conserved in structure and sequences among different influenza strains. In this study, a PAN based at-line nanofractionation (ANF) platform was applied to rapidly screen for PAN inhibitors from Rubus idaeus L. extract which presented good inhibitory effect on PAN with a half maximal inhibitory concentration (IC₅₀) value of 11 μg/mL. Eight PAN inhibitors were successfully screened out, comprising four organic acids and four flavones. In parallel, magnetic ligand fishing was used to isolate the PAN ligands from the extract, and finally four compounds were fished out and considered as PAN ligands (including avicularin, quercetin-3-O-rutinoside, ellagic acid and luteoloside) which were also identified by the ANF platform. Among them, ellagic acid and luteoloside displayed satisfactory in vitro inhibitory activity against PAN, with IC₅₀ values of 1.31 ± 0.33 and 6.23 ± 0.97 μM, respectively. The molecular docking and dynamic simulations revealed that ellagic acid and luteoloside bind to PAN in a distinctly different mode compared to baloxavir. These compounds formed direct interactions with catalytic pocket residues and adjacent amino acids in PAN, establishing hydrogen bonds and water-mediated bridges that modulated the protein's secondary structure and stability. The result from the study suggests that ellagic acid and luteoloside could serve as promising anti-influenza molecules. Furthermore, the ANF platform was proved effective for high-throughput screening of PAN inhibitors from complex herbal extracts, highlighting its significant potential for future anti-influenza drug development.

聚合酶亚基（PAN）的n端区域在不同的流感病毒株中具有高度保守的结构和序列，被认为是开发广谱抗病毒药物最有希望的靶点。本研究采用基于PAN的在线纳米分离（ANF）平台，快速筛选出对PAN有良好抑制作用的小红草提取物的PAN抑制剂，其半数最大抑制浓度（IC50）为11 μg/mL。成功筛选出8种PAN抑制剂，包括4种有机酸和4种黄酮。同时采用磁性配体捞取法从提取物中分离出PAN配体，最终捞出4个化合物（分别为木蒜素、槲皮素-3- o -芦丁苷、鞣花酸和木黄素苷），并经ANF平台鉴定为PAN配体。其中鞣花酸和木犀草苷对PAN的体外抑制活性较好，IC50值分别为1.31±0.33 μM和6.23±0.97 μM。分子对接和动力学模拟表明，鞣花酸和木犀草苷与PAN的结合模式与巴洛韦明显不同。这些化合物与PAN中的催化袋残基和邻近氨基酸形成直接相互作用，建立氢键和水介导的桥，调节蛋白质的二级结构和稳定性。研究结果表明鞣花酸和木犀草苷可以作为有前途的抗流感分子。此外，ANF平台被证明对复杂草药提取物中PAN抑制剂的高通量筛选是有效的，这突出了其在未来抗流感药物开发中的巨大潜力。

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引用次数: 0

Comparative study of pesticide analysis in river water by gas chromatography/mass spectrometry screening and standard methods 气相色谱/质谱筛选法与标准法分析河水中农药的比较研究

IF 3.2

Journal of chromatography open

Pub Date : 2025-11-01 DOI: 10.1016/j.jcoa.2025.100285

Norihiro Kobayashi , Yuko Tsuchiya , Sumomo Nakamura , Kenta Nohara , Takako Yamazaki , Tomoko Oda , Teruaki Kinoshita

This study entailed a comparative analysis of the standard method (notification method) and the screening method based on gas chromatography/mass spectrometry (GC/MS) for detecting 168 pesticides. To clarify the qualitative and quantitative accuracy of the GC/MS screening method, the occurrence of pesticides in river water samples was determined using both methods. The lowest concentration in the calibration curves for 155 pesticides was 0.01 mg/L, corresponding to a limit of quantification (LOQ) of 0.01 μg/L in river water after accounting for the 1000-fold concentration factor from sample pretreatment. Except for two cases wherein the chromatogram showed interference peaks, both methods yielded consistent identification results. The quantitative values obtained by the screening method were 0.52–1.45 times (quantitative error ranging from −48% to +45%) those obtained by the notification method. The quantitative error associated with the screening method decreased significantly with increasing quantitative values. Calibration curves for each pesticide were prepared five times throughout the study period. Upon comparing with the initial calibration curve, the changes in these calibration curve slopes generally vary between −50% and +100% for each pesticide. Quantitative accuracy could be ensured by comprehensively maintaining the instrument conditions, even during prolonged use. This indicates that the quantitative errors of the screening method are controllable, although they are not equivalent to those of the notification method. Therefore, the GC/MS screening method can be effectively utilized for water quality management. To avoid underestimation of pesticide concentrations, the GC/MS screening method values may be multiplied by a safety factor of 2.

对168种农药的标准检测方法（通报法）和气相色谱/质谱（GC/MS）筛选方法进行了对比分析。为了明确GC/MS筛选方法的定性和定量准确性，采用两种方法对河流水样中农药的出现情况进行了测定。155种农药的校准曲线最低浓度为0.01 mg/L，考虑样品前处理的1000倍浓度因子，河流水体的定量限为0.01 μg/L。除两例色谱出现干扰峰外，两种方法鉴定结果一致。筛选法得到的定量值是通报法的0.52 ~ 1.45倍（定量误差范围为- 48% ~ +45%）。随着定量值的增加，与筛选方法相关的定量误差显著降低。在整个研究期间，每种农药的校准曲线制备了5次。与初始校准曲线比较，每种农药的校准曲线斜率的变化通常在- 50%到+100%之间。即使在长时间使用期间，也可以通过全面维护仪器条件来确保定量准确性。这表明，筛选方法的定量误差是可控的，尽管它们不等同于通知方法的定量误差。因此，GC/MS筛选方法可以有效地用于水质管理。为避免农药浓度的低估，GC/MS筛选方法的值可乘以2的安全系数。

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引用次数: 0

Comment on ‘From multimodal liquid chromatography to supercritical fluid chromatography: Mapping chiral separation of the major organic ultraviolet filters’ (JCO 8 (2025) 100251. https://doi.org/10.1016/j.jcoa.2025.100251) - peak assignment for cis- and trans-homosalate 对“从多模态液相色谱到超临界流体色谱：绘制主要有机紫外过滤器的手性分离图谱”（JCO 8(2025) 100251）的评论。https://doi.org/10.1016/j.jcoa.2025.100251) -顺式和反式homosalate的峰分配

IF 3.2

Journal of chromatography open

Pub Date : 2025-11-01 DOI: 10.1016/j.jcoa.2025.100277

Daniel Bury, Katharina E. Ebert, Holger M. Koch

引用次数: 0