毛细管气相色谱法同时测定饮用水中多种微量的挥发酚

本文建立了同时测定饮用水中多种微量挥发酚:苯酚、2-氯苯酚、对甲基苯酚、2,4-二氯苯酚的毛细管气相色谱方法。水样以乙醚及硫酸的混合液萃取,经氢氧化钠溶液反萃取,调整酸度后再以乙醚萃取,利用毛细管柱气相色谱-FID检测,以外标法定量。该方法测定的苯酚、2-二氯苯酚、对甲基苯酚、2,4-二氯苯酚的标准工作曲线方程分别为y=15.275x+2.5942(r=0.9995)、y=11.42x+2.9701(r=0.9992)、y=15.506x+3.6894(r=0.9996)、y=8.9453x?2.185(r=0.9991),检出限(S/N=3)分别为9.5×10-5μg.mL-1、1.3×10-4μg.mL-1、9.4×10-5μg.mL-1、1.6×10-4μg.mL-1,线性范围分别是3.2×10-4~15μg.mL-1、4.3×10-4~9.1μg.mL-1、3.1×10-4~16μg.mL-1、5.3×10-4~5.3μg.mL-1。对标准混合物溶液进行了3个不同水平的添加,每个水平重复5次进样,苯酚、2-氯苯酚、对甲基苯酚、2,4-二氯苯酚的加标回收率分别为89%~101%、83%~93%、77%~...

Simultaneous Determination of Several Trace Volatile Phenols in Drinking Water by Capillary Gas Chromatograph

Capillary gas chromatography was established for simultaneous determination of trace volatile phenols in drinking water,including phenol,2-chlorophenol,p-methylphenol and 2,4-dichloro phenol.The samples,extracted with mixture of sulfuric acid and ether and reextracted by sodium hydroxide,then extracted with the same mixture indicated above were quantified by external standards using a capillary column with a flame ionization detector.The equations for linear regression calibration curves of phenol,2-chlorop...