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

IF 1.3 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Bulletin of the Chemical Society of Ethiopia Pub Date : 2024-07-12 DOI:10.4314/bcse.v38i5.1
Habtamu Bekele, Abi Legesse, W. Yohannes, Negussie Megersa
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引用次数: 0

摘要

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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Development of cost-effective dispersive liquid-liquid micro-extraction technique for preconcentration of multi-residue herbicides in environmental waters prior to Chromatographic analysis
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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来源期刊
CiteScore
2.20
自引率
8.30%
发文量
113
审稿时长
6-12 weeks
期刊介绍: The Bulletin of the Chemical Society of Ethiopia (BCSE) is a triannual publication of the Chemical Society of Ethiopia. The BCSE is an open access and peer reviewed journal. The BCSE invites contributions in any field of basic and applied chemistry.
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