采用中空纤维液相微萃取和毛细管区带电泳法测定河口和河流水体中的水杨酸
Salicylic acid determination in estuarine and riverine waters using hollow fiber liquid-phase microextraction and capillary zone electrophoresis.
作者信息
da Silva Gilmar Silvério, Lima Diana L D, Esteves Valdemar Inocêncio
机构信息
Federal Institute of Education, Science and Technology of Maranhão, Department of Chemistry, Monte Castelo Campus, Getúlio Vargas Avenue, n° 04, São Luís, MA, Zip Code 65030-005, Brazil.
CESAM & Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal.
出版信息
Environ Sci Pollut Res Int. 2017 Jun;24(18):15748-15755. doi: 10.1007/s11356-017-9183-2. Epub 2017 May 20.
A low-cost methodology using hollow fiber liquid-phase microextraction (HF-LPME) and capillary zone electrophoresis (CZE) with UV-Vis detector was developed to analyze the salicylic acid (SA) in estuarine and riverine waters. The technique is easy-to-use and rapid, and demands little volume of organic solvent. The extraction was carried out using a polypropylene membrane supporting into octan-1-ol. HF-LPME under optimized conditions (donor solution sample pH 2, acceptor solution pH 14, sample volume 25 mL, fiber length 10 cm, acceptor volume 25 μL, extraction time 3 h and stirring speed 350 rpm) presented high enrichment factor (407 times) and good recovery in real water samples (from 88 to 110%). A limit of detection of 2.6 μg L was achieved using CZE with UV-Vis detector as quantification method. The method was applied to direct quantification of SA in environmental complex estuarine and riverine water matrices.
开发了一种低成本方法，该方法采用中空纤维液相微萃取（HF-LPME）和配备紫外可见检测器的毛细管区带电泳（CZE）来分析河口和河流水体中的水杨酸（SA）。该技术易于使用且快速，并且所需有机溶剂体积很少。萃取是使用支撑于1-辛醇中的聚丙烯膜进行的。在优化条件下（供体溶液样品pH值为2，受体溶液pH值为14，样品体积25 mL，纤维长度10 cm，受体体积25 μL，萃取时间3 h，搅拌速度350 rpm）的HF-LPME在实际水样中呈现出高富集因子（407倍）和良好的回收率（88%至110%）。使用配备紫外可见检测器的CZE作为定量方法时，检测限达到2.6 μg/L。该方法应用于直接定量环境复杂的河口和河流水体基质中的SA。
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