室内空气.第3部分:室内和试验室空气中甲醛和其他羰基化合物的测定.活性取样法

[中文适用范围]： 本文件规定了空气中的甲醛（HCHO）和其他羰基化合物（醛和酮）的测定方法。该方法专门用于甲醛检测，但经修改后至少可以检测和定量其他12种芳香族、饱和和不饱和的脂类羰基化合物。适用于测定浓度范围在 1 µg/m³ 至 1 mg/m³ 之间的甲醛和其他羰基化合物。采样方法给出加权时间平均（TWA）样品。可用于长期（1 小时至 24 小时）或短期（5 分钟至 60 分钟）空气采样以测定甲醛。本文件规定了涉及从空气中采集样本至涂有 2,4-二硝基苯肼（DNPH）试剂的吸附剂载体 cartridge 并通过高效液相色谱法（HPLC）结合紫外分光检测分析生成的衍生物的采样和分析程序。该方法不适合用于较长链或不饱和的羰基化合物。本文件适用于以下物质的测定：乙酸醛、丙酮、苯甲醛、丁醛、己醛、2,5-二甲基苯甲醛、甲醛、异戊醛、丙醛、间甲酚醛、对甲酚醛、对甲酚醛、戊醛。 [外文原描述]： This document specifies a determination of formaldehyde (HCHO) and other carbonyl compounds (aldehydes and ketones) in air. The method is specific to formaldehyde but, with modification, at least 12 other aromatic as well as saturated and unsaturated aliphatic carbonyl compounds can be detected and quantified. It is suitable for determination of formaldehyde and other carbonyl compounds in the approximate concentration range 1 µg/m 3 to 1 mg/m 3 . The sampling method gives a time-weighted average (TWA) sample. It can be used for long-term (1 h to 24 h) or short-term (5 min to 60 min) sampling of air for formaldehyde. This document specifies a sampling and analysis procedure for formaldehyde and other carbonyl compounds that involves collection from air on to adsorbent cartridges coated with 2,4-dinitrophenylhydrazine (DNPH) and subsequent analysis of the hydrazones formed by high performance liquid chromatography (HPLC) with detection by ultraviolet absorption [12],[16] . The method is not suitable for longer chained or unsaturated carbonyl compounds.