da Silva Gilmar Silvério, Lima Diana L D, Esteves Valdemar Inocêncio
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.
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。
