气相色谱质谱法测定地表水中的7种工业多氯联苯  

DETERMINATION OF SEVEN INDUSTRIAL POLYCHLORINATED BIPHENYLS IN SURFACE WATER BY GAS CHROMATOGRAPHY MASS SPECTROMETRY

作　　者：李玉泽 马亮 王玉功 LI Yu-ze;MA Liang;WANG Yu-gong(The Third Institute of Geology and Mineral Exploration,Gamu Provincial Bureau of Geology and Mineral Exploralion and Development,Lanzhou 730050,China)

机构地区：[1]甘肃省地矿局第三地勘院,甘肃兰州730050

出　　处：《甘肃地质》2021年第4期80-84,共5页Gansu Geology

摘　　要：建立以液液萃取—气相色谱质谱法测定地表水中7种工业多氯联苯(Aroclor)总量的方法。采用质谱选择离子模式采集数据,通过比对色谱图定性,选择特征定量峰定量。采用Aroclor 1016与Aroclor 1260的混合标准液进行了精密度、准确度、方法检出限与校准曲线实验。实验结果表明:该方法在20~1000 ug/L范围内线性关系良好(r;≥0.9990),7种工业多氯联苯的相对标准偏差(RSD)为:3.00%~8.87%,检出限(LOD)为0.008 ug/L,且样品的加标回收率、替代物回收率分别为84.3%~105%、87.2%~112%,该法准确度和精密度均满足分析方法的要求,实现了对地表水中7种工业多氯联苯的准确测定。A method was established for the determination of total amount of 7 industrial polychlorinated biphenyls(Aroclor)in surface water by gas chromatography-mass spectrometry coupled with liquid-liquid extraction.The selected ion mode of mass spectrometry was used to collect data,and the characteristic quantitative peak was selected for quantitative analysis by comparing the chromatogram qualitatively.The mixed standard solution of aroclor1016 and aroclor 1260 was used to test the precision,accuracy,detection limit and calibration curve.The results showed that this method provided a wide linearity in the range of 20~1000 ug/L with correlation coefficient of 0.9990,The relative standard deviations(RSDs)were 3.0%~8.87%for seven industrial polychlorinated biphenyls.the detection limits were 0.008 ug/L,and the sample recovery rate and the recovery rate of substitutes can reach 84.3%~105%,87.2%~112%,respectively.It was found that the accuracy and precision canmeet the requirements for analysis method,which realize the accurate detection of seven industrial polychlorinated biphenyls in surface water.

关 键 词：地表水 多氯联苯Aroclor 液液萃取 气相色谱质谱 

分 类 号：O657.7[理学—分析化学]