Salthammer Tunga, Mentese Sibel
Fraunhofer Wilhelm-Klauditz-Institute (WKI), Material Analysis and Indoor Chemistry, Bienroder Weg 54 E, 38108 Braunschweig, Germany.
Chemosphere. 2008 Nov;73(8):1351-6. doi: 10.1016/j.chemosphere.2008.06.054. Epub 2008 Aug 22.
The level of carbonyl compounds in indoor air is crucial due to possible health effects and the high prevalence of their potential sources. Therefore, selecting a convenient and rapid analytical technique for the reliable detection of carbonyl compound concentrations is important. The acetyl acetone (acac) method is a widely used standard procedure for detecting gaseous formaldehyde. For measuring formaldehyde along with other carbonyl compounds, the DNPH-method is commonly applied. The recommended procedure for measuring volatile organic compounds (VOCs) is sampling on Tenax TA, followed by thermal desorption and GC/MS analysis. In this study, different analytical techniques for the quantification of formaldehyde, pentanal, and hexanal are critically compared. It was found that the acac- and DNPH-method are in very good agreement for formaldehyde. In contrast, the DNPH-method significantly underestimates indoor air concentrations of the higher aldehydes in comparison to sampling on Tenax TA, although both methods are strongly correlated. The reported results are part of the EURIMA-WKI study on levels of indoor air pollutants resulting from construction, building materials and interior decoration.
由于可能对健康产生影响以及其潜在来源的高普遍性，室内空气中羰基化合物的水平至关重要。因此，选择一种方便快捷的分析技术来可靠地检测羰基化合物浓度非常重要。乙酰丙酮（acac）法是检测气态甲醛的一种广泛使用的标准方法。为了同时测量甲醛和其他羰基化合物，通常采用2,4-二硝基苯肼（DNPH）法。测量挥发性有机化合物（VOCs）的推荐程序是在Tenax TA上采样，然后进行热解吸和气相色谱/质谱分析。在本研究中，对用于定量甲醛、戊醛和己醛的不同分析技术进行了严格比较。结果发现，acac法和DNPH法对甲醛的测定结果非常一致。相比之下，尽管两种方法相关性很强，但与在Tenax TA上采样相比，DNPH法显著低估了室内空气中较高醛类的浓度。报告的结果是EURIMA-WKI关于建筑、建筑材料和室内装饰产生的室内空气污染物水平研究的一部分。
