Spectrophotometric Determination of Formaldehyde in the System of Cobaltous Sulfate With Ethylenediamine
- VernacularTitle:环境中甲醛的硫酸亚钴-乙二胺体系分光光度测定法
- Author:
Aiming LIU
;
Duxiao JIANG
- Publication Type:Journal Article
- Keywords:
Formaldehyde;
Spectrophotometry;
Cobaltous sulfate;
Ethylenediamine
- From:
Journal of Environment and Health
1993;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To propose a new spectrophotometric method for determination of trace formaldehyde. Methods The method was based on the sensitive effect of formaldehyde in the system of cobaltous sulfate with ethylenediamine in sulfuric acid medium. Results The stable system of cobaltous sulfate with ethylenediamine could be kept seven days at least. Formaldehyde in the linear concentration range of 0.10-3.6 ?g/ml was determined with a detection limit of 0.16 ?g/ml, and the correlation coefficient was 0.997 6. Conclusion This method is simple, quick and has a high sensitivity and a good reproducibility. It has been applied to measure the given formaldehyde in tap water and free formaldehyde in UF resin with satisfactory results.
