涂料中甲醛的光度法测定  

PHOTOMETRIC DETERMINATION OF FORMALDEHYDE IN PAINTS WITH FUCHSIN-SODIUM SULFITE REACTION SYSTEM

作　　者：赵金伟[1,2] 程薇[3] 卢志刚[3] 陈光[1] 

机构地区：[1]南京理工大学材料科学与工程系 [2]江苏出入境检验检疫局,南京210001 [3]江苏出入境检验检疫局

出　　处：《理化检验（化学分册）》2005年第1期17-18,20,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：在室温和酸性条件下,甲醛与品红-亚硫酸钠作用呈现玫瑰红色,遇硫酸后颜色变成深蓝色,可比色定量。文中选用品红-亚硫酸钠法测定涂料中甲醛含量,确定了方法的最佳试验条件。方法的线性范围为0.20-1.00mg·L-1,检出限为0.20mg·L-1,相对标准偏差小于2.03%。与其它吸光光度法相比,几种方法的结果基本一致。The fuchsin-sodium sulfite photometric method was used for the determination of formaldehyde in paints. The conditions of determination was optimized. Linearity relationship between the absorbance (measured at 580 nm with 1 cm cell against reagent blank) and the concentration of formaldehyde was found in the range of 0. 20 -1. 00 mg·@L-1 with a detection limit of 0. 20 mg·L-1. RSD's (n=6) found were less than 2. 03%. The results obtained were checked with some other photometric method and no significant deviations were found.

关 键 词：光度法 品红-亚硫酸钠 甲醛 涂料 

分 类 号：O653.21[理学—分析化学]