使用低成本被动取样器和分光光度测定法评估学校用品的甲醛排放

C. Furlan, Lúcia Helena Gomes Coelho
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引用次数: 0

摘要

本文介绍了一种低成本的室内甲醛(CH2O)被动监测仪的研制与应用。该系统是基于甲醛和副玫瑰苯胺在收集过滤器上的扩散取样,然后用分光光度法对产物进行洗脱和分析。该系统在甲醛标准气氛下进行了验证,收集效率为99%。将该装置应用于学校用品(闪光胶、造型粘土、蜡笔、胶棒、毛笔和塑料墨水)的甲醛释放量评估,其中毛笔的甲醛浓度最高(约170 μg/g),而胶棒的甲醛浓度较低(14 μg/g)。被动采样器在小学教室环境中的应用表明,在学校中可以测量到相对较高的甲醛水平,通常被认为与教室中高密度的家具有关,但也证实,当与通风不良有关时,学校用品会显著增加室内甲醛浓度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of formaldehyde emissions by school supplies using a low-cost passive sampler and spectrophotometric determination
This article presents the development and application of a low-cost passive monitor for indoor formaldehyde (CH2O) monitoring. The system is based on the diffusion sampling of formaldehyde and the pararosaniline reaction on a collection filter, followed by the elution and analysis of the product by spectrophotometry. The system was validated against a standard atmosphere of formaldehyde with 99% of collection efficiency. The device was applied in the assessment of formaldehyde emissions for school supplies (glitter glue, modeling clay, crayons, glue stick, felt pen, and plastic ink), in which the highest concentrations of formaldehyde were obtained for the felt-tip pen (approximately, 170 μg/g) and the lesser to glue stick (14 μg/g). The application of the passive sampler in a primary classroom environment demonstrated that relative high levels of formaldehyde can be measured in schools are usually considered to be linked to the high density of furniture in the classrooms, but it was also verified that school supplies can significantly contribute in the concentrations of formaldehyde indoor when associated to poor ventilation.
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