气相色谱法测定水质中的内吸磷  

Determination of Demeton in Water by Gas Chromatography

作　　者：朱小梅 张宗祥 丁金美 ZHU Xiao-mei;ZHANG Zong-xiang;DING Jin-mei(Jiangsu Taizhou Environmental Monitoring Center,Taizhou,Jiangsu 225300,China)

机构地区：[1]江苏省泰州环境监测中心

出　　处：《环境监控与预警》2019年第4期32-36,共5页Environmental Monitoring and Forewarning

摘　　要：优化了气相色谱法测定水质中的内吸磷,当取样量为100 mL时,内吸磷-O方法检出限为0.30μg/L,测定下限为1.20μg/L;内吸磷-S方法检出限为0.80μg/L,测定下限为3.20μg/L。内吸磷-O和内吸磷-S标准曲线线性良好,相关系数分别为0.999 2和0.999 8。不同水质中内吸磷-O的加标回收率为90.3%~104%,相对标准偏差为3.6%~9.2%;内吸磷-S的加标回收率为92.1%~94.9%,相对标准偏差为4.6%~8.7%。该方法灵敏度高,能有效分离内吸磷-O和内吸磷-S,同时能将内吸磷-O、内吸磷-S与其他有机磷农药类干扰物分离。The detection method of demeton in water by gas chromatography was optimized.When the sample volume was 100 mL,detection limit of demeton-O was 0.30μg/L,with a lower detection limit of 1.20μg/L,while the detection limit of demeton-S was 0.80μg/L,with a lower detection limit of 3.20μg/L.Demeton-O and demeton-S both showed excellent linarity,the correlation coefficients were 0.999 2 and 0.999 8,respectively.In different water quality,the spike recoveries of demeton-O ranged from 90.3%to 104%,the relative standard deviations were in the range of 3.6%~9.2%.And the spike recoveries of demeton-S ranged from 92.1%to 94.9%,the relative standard deviations were in the range of 4.6%~8.7%.The method had high sensitivity,it could effectively separate demeton-O and demeton-S,and could be separated effectively from other organophosphorus pesticide distractors.

关 键 词：气相色谱法 水质 内吸磷 内吸磷-O 内吸磷-S 分离 

分 类 号：X832[环境科学与工程—环境工程] O657.71[理学—分析化学]