室内空气中甲醛检测方法的改进研究  

Research on the Improvement of Formaldehyde Detection Methods in Indoor Ambient Air

作　　者：张巧丽 曹高品 郭红梅 崔征 左勇志 Zhang Qiaoli;Cao Gaopin;Guo Hongmei;Cui Zheng;Zuo Yongzhi(China Institute of Building Standard Design&Research,Beijing 100048,China)

机构地区：[1]中国建筑标准设计研究院有限公司,北京100048

出　　处：《山西化工》2025年第2期67-69,共3页Shanxi Chemical Industry

基　　金：国家重点研发计划项目(2021YFF0602000)。

摘　　要：根据《公共场所卫生检验方法 第2部分:化学污染物》(GB/T 18204.2-2014)中甲醛的酚试剂分光光度法,现场采样结束后需要将样品溶液由吸收管转移至比色管中进行检测分析。针对这一步骤,从理论和实验两方面,分别对三种不同操作方法的回收率、线性和重复性精密度进行了对比分析。其中方法 A为标准规定的方法;方法 B为转移样品溶液后,舍弃吸收管中的残留液,直接进行分析的方法;方法 C为增加样品溶液为10m L,转移其中5m L进行分析的方法。结果表明,与其他两种方法相比,方法 C可以获得更稳定的回收率、更好的线性以及更高的重复性精密度。因此,采用酚试剂分光光度法进行甲醛检测时,采样阶段可以量取10 m L的吸收液;采样结束时,只量取其中的5 m L进行检测,从而确保检测结果的准确性及可靠性。According to MBTH spectrophotometriy of formaldehyde in Examination Methods for Public Places-Part 2:Chemical Pollutants(GB/T 18204.2-2014),after the on-site sampling,the sample solution needs to be transferred from the absorption tube to the colorimetric tube for detection and analysis.Focusing on this step,the recovery rate,linearity and repeatability precision of three different operation modes are compared and analyzed theoretically and experimentally.Method A is the method specified in the standard.Method B is the method of direct analysis by discarding the residual liquid in the absorption tube after transferring the sample solution.Method C is the method of increasing the sample solution to 10 mL and transferring 5 mL of it for analysis.The results show that compared with the other two methods,method C can obtain more stable recovery rate,better linearity and higher repeatability precision.Therefore,when MBTH spectrophotometry is used to detect formaldehyde,10 mL of absorption solution can be measured at the sampling stage.At the end of sampling,only 5 mL of the sample is taken for detection,so as to ensure the accuracy and reliability of the detection results.

关 键 词：室内环境 酚试剂 甲醛 检测方法 改进 

分 类 号：O652.1[理学—分析化学] X511[理学—化学]