ISO 17733:2015 工作场所空气 汞和无机汞化合物的测定 用冷蒸汽原子吸收光谱法或原子荧光光谱法

标准编号：ISO 17733:2015

中文名称：工作场所空气 汞和无机汞化合物的测定 用冷蒸汽原子吸收光谱法或原子荧光光谱法

英文名称：Workplace air — Determination of mercury and inorganic mercury compounds — Method by cold-vapour atomic absorption spectrometry or atomic fluorescence spectrometry

发布日期：2015-12

标准范围

This International Standard specifies a procedure for determination of the time-weighted average massconcentration of mercury vapour and inorganic mercury compounds in workplace air. Mercury vapouris collected on a solid sorbent using either a diffusive badge or a pumped sorbent tube. Particulateinorganic mercury compounds, if present, are collected on a quartz fibre filter. Samples are analysedusing either cold vapour atomic absorption spectrometry (CVAAS) or cold vapour atomic fluorescencespectrometry (CVAFS) after acid dissolution of the mercury collected.This International Standard is applicable to the assessment of personal exposure to mercury vapourand/or particulate inorganic mercury compounds in air for comparison with long-term or short-termexposure limits for mercury and inorganic mercury compounds and for static (area) sampling.The lower limit of the working range of the procedure is the quantification limit. This is determinedby the sampling and analysis methods selected by the user, but it is typically in the range 0,01 μg to0,04 μg of mercury (see 13.1). The upper limit of the working range of the procedure is determined bythe capacity of the diffusive badge, sorbent tube or filter used for sample collection, but it is at least30 μg of mercury (see 13.2). The concentration range of mercury in air for which this InternationalStandard is applicable is determined in part by the sampling method selected by the user, but it is alsodependent on the air sample volume.The diffusive badge method is not applicable to measurements of mercury vapour when chlorine ispresent in the atmosphere, e.g. in chloralkali works, but chlorine does not interfere with the pumpedsorbent tube method (see 13.12.1). Gaseous organomercury compounds could cause a positiveinterference in the measurement of mercury vapour (see 13.12.2). Similarly, particulate organomercurycompounds and gaseous organomercury compounds adsorbed onto airborne particles could cause apositive interference in the measurement of particulate inorganic mercury compounds (see 13.12.3).

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