引用本文:朱小梅,张宗祥,丁金美.气相色谱法测定水质中的内吸磷[J].环境监控与预警,2019,11(4):32-36
ZHU Xiao-mei, ZHANG Zong-xiang, DING Jin-mei.Determination of Demeton in Water by Gas Chromatography[J].Environmental Monitoring and Forewarning,2019,11(4):32-36
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气相色谱法测定水质中的内吸磷
朱小梅,张宗祥,丁金美
江苏省泰州环境监测中心,江苏 泰州 225300
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0.30 μg/L,测定下限为120 μg/L;内吸磷-S方法检出限为0.80 μg/L,测定下限为3.20 μg/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。
关键词:  气相色谱法  水质  内吸磷  内吸磷-O  内吸磷-S,分离
DOI:
分类号:X832;O657.7+1
文献标识码:B
基金项目:
Determination of Demeton in Water by Gas Chromatography
ZHU Xiao-mei, ZHANG Zong-xiang, DING Jin-mei
Jiangsu Taizhou Environmental Monitoring Center, Taizhou, Jiangsu 225300,China
Abstract:
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 0.30 μg/L, with a lower detection limit of 1.20 μg/L, while the detection limit of demeton S was 0.80 μg/L, with a lower detection limit of 3.20 μg/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.
Key words:  Gas chromatography  Water quality  Demeton  Demeton O  Demeton S  Separation