ISO 20552:2007 工作场所空气 汞蒸汽测定 建立在原子吸收光谱法或原子荧光光谱法基础上的金汞齐收集分析法

标准编号：ISO 20552:2007

中文名称：工作场所空气 汞蒸汽测定 建立在原子吸收光谱法或原子荧光光谱法基础上的金汞齐收集分析法

英文名称：Workplace air — Determination of mercury vapour — Method using gold-amalgam collection and analysis by atomic absorption spectrometry or atomic fluorescence spectrometry

发布日期：2007-02

标准范围

ISO 20552:2007规定了使用金汞合金收集法测定工作场所空气中汞蒸汽质量浓度的程序，并通过冷蒸汽原子吸收光谱法（CVAAS）或冷蒸汽原子荧光光谱法（CVAFS）进行分析。本程序规定了不同应用的多种取样方法。该程序适用于在流速介于100 ml/min和1000 ml/min之间进行采样时进行短期测量（例如15 min），以评估长期的稳定性-在汞蒸气浓度预计低于每立方米20微克的工作场所，如8小时的长期暴露，该程序可在采样流速为每分钟100毫升的情况下使用。如果汞蒸气的预期浓度高于每立方米20微克，则有必要使用ISO 17733中规定的程序。ISO 20552:2007不适用于测量大气中存在氯时空气中的汞蒸气，例如氯碱厂中的汞蒸气。气态有机汞化合物会造成正干扰。

ISO 20552:2007 specifies a procedure for determination of the mass concentration of mercury vapour in workplace air using a method of gold-amalgam collection with analysis by either cold vapour atomic absorption spectrometry (CVAAS) or cold vapour atomic fluorescence spectrometry (CVAFS). The procedure specifies a number of sampling methods for different applications.The procedure is suitable for making short-term measurements (e.g. 15 min) when sampling at a flow rate of between 100 ml per min and 1 000 ml per min. For assessment of long-term exposure, such as 8 h, this procedure can be used with sampling flow rate of 100 ml per min in workplaces where the concentration of mercury vapour is expected to be lower than 20 micrograms per cubic metre. If the expected concentration of mercury vapour is higher than 20 micrograms per cubic metre, it is necessary to use the procedure prescribed in ISO 17733.ISO 20552:2007 is unsuitable for making measurements of mercury vapour in air when chlorine is present in the atmosphere, e.g. in chloralkali works. Gaseous organo-mercury compounds can cause a positive interference.

标准预览图