室内空气中甲醛快速检测的研究

A Method for Quick Determination of Formaldehyde in Indoor Air

对使用BH-1型甲醛分析仪测定室内空气中甲醛浓度的方法进行了研究。对于低、中、高甲醛浓度的测定,其相对误差<1.8%,相对标准偏差(RSD)<5.6%(n=6),平均相对标准偏差(MRSD)<4.9%(n=6)。同时与国家标准方法(GB/T 18204.26酚试剂分光光度法)进行了实验室和现场比对,测定结果无显著差异,该仪器测定的总不确定度为10.4%,其方法快速、灵敏,适合现场多点、大批量监测,可与酚试剂分光光度法等效使用。

A method of determining the formaldehyde in indoor air is studied by using formaldehyde analyzer BH-1. According to our study of typical low, medium and high concentration formaldehyde gases, the relative error is below 1.8 %, RSD is below 5.6% （ n = 6）, and the mean relative standard deviation is below 4.9% （ n = 6） .Also this method is compared with the national standard mothod （GB/T 18204.26 Hydroxybenzene reagent spectrophotometer method） at laboratory and on the spot, and the results show no distinct difference between these two methods. The total uncertainty of the BH-I analyzer analyzing formaldehyde is 10.4% . This instrument method is fast and sensitive, and suitable for determining formaldehyde on the spot, especially when the spots or the sites are numerous. It proves that this fast method can be used with equal efficiency as the hydroxybenzene reagent spectrophotometer method.