Determination of Trace Formaldehyde in Textiles by Discoloring Kinetic Spectrophotometry
- VernacularTitle:纺织品中痕量甲醛的褪色动力学分光光度测定法
- Author:
Ningsheng CHEN
;
Xinyuan GUO
;
Haiqing LUO
- Publication Type:Journal Article
- Keywords:
Laboratory techniques and procedure;
Spectrophotometry;
Formaldehyde;
Textiles
- From:
Journal of Environment and Health
1993;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish a discoloring kinetic analysis method for determination of trace formaldehyde in textiles. Methods Based on the catalysis of formaldehyde on the discoloring reaction of bromophenol blue oxidized by potassium bromated in phosphoric acid medium,the contents of formaldehyde in textiles were determinated by spectrophotometry. The optimum condition and kinetic parammeters of the reaction were studied in detail. Results The optimum required volumes of reagents were 2.0,3.0,1.0 ml for H3PO4,KBrO3 and bromophenol blue respectively.The reaction was optimized at 85 ℃ for10 min.At working wave length of 430 nm,the linear range was 0.05-0.40 ?g/ml,the detection limit was 0.006 9 ?g/ml ,the recovery rate and RSD were 96%-106% and 2.9%-3.2% respectively. Conclusion This method was easy ,rapid and sensitive for the determination of trace formaldehyde in textiles.
