Development of cost-effective dispersive liquid-liquid micro-extraction technique for preconcentration of multi-residue herbicides in environmental waters prior to Chromatographic analysis

IF 17.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-07-12 DOI:10.4314/bcse.v38i5.1

Habtamu Bekele, Abi Legesse, W. Yohannes, Negussie Megersa

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Abstract

High-density dispersive liquid-liquid microextraction method coupled with high-performance liquid chromatography with a diode array detector (HD-DLLME-HPLC-DAD) was developed for extraction and determination of six commonly used sulfonylurea herbicides in matrices of environmental waters. For simultaneous extraction of the target herbicides, the optimum experimental parameters that 024influence extraction efficiency were investigated. Under optimized conditions, the limit of detection (LOD) and quantification (LOQ) were 0.8-1.5 and 1.9-5.1 ng mL−1, respectively. The precisions in terms of relative standard deviations (% RSDs) of both intra-day and inter-day precisions (n = 6) were found to be 2.92 to 7.08 and 3.01 to 8.13, respectively. Furthermore, applicability of the developed method was investigated by analyzing spiked tap, lake, river and underground water samples and satisfactory recoveries were obtained in the range of 84.3–101.7% with RSDs < 9.8% (n = 6) and the target analytes were not detected in real samples. The proposed method offered several attractive features including fast analysis time, simplicity, sensitivity, and selectivity. Therefore, the trace level enrichment and assessment of sulfonylurea herbicides residues from environmental water matrices using HD-DLLME-HPLC-DAD could be utilized as a reliable alternative in routine laboratory analysis of contaminated environmental waters. KEY WORDS: Environmental water, High-density dispersive liquid-liquid microextraction, HPLC-DAD, Miniaturization analytical technique, Sulfonylurea herbicides, Trace level enrichment Bull. Chem. Soc. Ethiop. 2024, 38(5), 1189-1204. DOI: https://dx.doi.org/10.4314/bcse.v38i5.1

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开发具有成本效益的分散液-液微萃取技术，用于在色谱分析前预浓缩环境水体中的多残留除草剂

建立了环境水体中6种常用磺酰脲类除草剂的高密度分散液相微萃取-高效液相色谱-二极管阵列检测器(HD-DLLME-HPLC-DAD)萃取检测方法。为了同时萃取目标除草剂，研究了影响萃取效率的最佳实验参数。在优化条件下，检出限（LOD）和定量限（LOQ）分别为 0.8-1.5 和 1.9-5.1 ng mL-1。日内和日间精密度（n = 6）的相对标准偏差（% RSDs）分别为 2.92 至 7.08 和 3.01 至 8.13。此外，还通过分析加标自来水、湖水、河水和地下水样品考察了所开发方法的适用性，结果令人满意，回收率在 84.3-101.7% 之间，RSD < 9.8% (n = 6)，且在实际样品中未检测到目标分析物。该方法具有分析时间短、操作简单、灵敏度高和选择性强等优点。因此，利用 HD-DLLME-HPLC-DAD 对环境水体中的磺酰脲类除草剂残留进行痕量富集和评估，可作为一种可靠的替代方法用于受污染环境水体的常规实验室分析。关键词：环境水体高密度分散液相微萃取 HPLC-DAD 微型化分析技术磺酰脲类除草剂微量富集 Bull.Chem.Soc. Ethiop.2024, 38(5), 1189-1204. DOI: https://dx.doi.org/10.4314/bcse.v38i5.1

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.