尿中N-甲基乙酰胺直接进样-氮磷检测气相色谱分析法
Zhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi = Chinese journal of industrial hygiene and occupational diseases(2012)
Abstract
目的 建立直接进样-气相色谱法检测尿中N-甲基乙酰胺(NMAC),为研制职业接触二甲基乙酰胺生物限值提供配套检测方法.方法 用甲醇稀释经冷冻离心的尿样,分离蛋白沉淀后直接进样,经聚乙二醇毛细管色谱柱程序升温分离,氮磷检测器检测.结果 尿中NMAC的线性范围为1.0~250 mg/L,相关系数为1.0000;最低检测浓度为0.2 mg/L;添加水平为10.58、52.90、211.60 mg/L时,NMAC回收率为96.0%~99.4%,平均回收率为97.8%;批内和批间相对标准偏差为1.5%~3.4%.结论 本方法简便快速,灵敏准确,适用于DMAC职业暴露人群尿样中NMAC的监测.
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Key words
N-methylacetamide,N-dimethylacetamide,Human urine,Direct sample injection,GC/NPD
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