Optimization of enrichment processes

Optimization of enrichment processes of pentachlorophenol (PCP) from water samples

Abstract： The method of enriching PCP (pentachlorophenol) from aquatic environment by solid phase extraction (SPE) was studied.Several factors affecting the recoveries of PCP, including sample pH, eluting solvent, eluting volume and flow rate of water sample, were optimized by orthogonal array design(OAD). The optimized results were sample pH 4; eluting solvent, 100% methanol; eluting solvent volume, 2 mi and flow rate of water sample, 4 mi/min. A comparison is made between SPE and liquid-liquid extraction(LLE) method. The recoveries of PCP were in the range of 87.6 % 133.6 % and 79 %- 120.3 % for S PE and LLE, respectively. Important advantages of the SPE compared with the LLE include the short extraction time and reduced consumption of organic solvents. SPE can replace LLE for isolating and concentrating PCP from water samples. 作 者： LI Ping    LIU Jun-xin   作者单位： Research Center for Eeo-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085  期 刊： 环境科学学报(英文版)  ISTICSCI   Journal： JOURNAL OF ENVIRONMENTAL SCIENCES  年，卷(期)： 2004, 16(1)  分类号： X703  Keywords： pentachlorophenol(PCP)    solid- phase extraction    liquid- liquid extraction