Abstract

目的 研制作业场所空气中氯化氰的检测方法.方法 采用磷酸盐缓冲液和吡啶-巴比妥酸作吸收液进行采样,用分光光度法测定.同时对pH值、显色时间、温度、氯胺T加入量、缓冲液不同配比、显色剂配比、最大吸收波长等条件进行优化.对方法的线性范围、检出限、精密度、回收率、采样效率等特性指标进行试验.结果 方法的测定范围为0~0.4 μg/ml,相关系数为0.9993,回归方程为(Y)=1.547x-0.005,检出限为0.016μg/ml,测定下限为0.07 μg/ml,变异度为1.1%~2.8%,样品回收率为98.9%~109.8%.采样效率为92.9%~98.9%.结论 吡啶-巴比妥酸光度法测定氯化氰,是一种简单、快速、准确、灵敏、经济、特异度好、易于推广的检测方法,性能指标满足职业接触限值的检测要求。

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