Determination of Chromium in Human Hair by Spectrophotometry
- VernacularTitle:人发中铬的分光光度测定法
- Author:
Guangmei GUO
;
Gengliang YANG
;
Shiwen DING
- Publication Type:Journal Article
- Keywords:
Laboratory techniques and procedure;
Chromium;
Spectrophotometry
- From:
Journal of Environment and Health
1993;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the determination of chromium in human hair by spectrophotometry using starch as color agent. Methods The total chromium(Cr)in human hair was oxidized by (NH4?雪2S2O3 into Cr6+,which could oxidize KI to form I-3 in acid medium. I-3 reacted with starch to form a blue colored complex,which revealed the maximum absorption peak at 590 nm. Results The contents of Cr in human hair were 8.46-29.56 ?g/g.The lowest detection limit and linear range were 0.02 and 0.02-1.0 ?g/ml respectively.The coefficient of variation and standard material-added recovery rates were 3.3% and 94.8%-104.5% respectively. Conclusion This methods was rapid,accurate and convenient for the determination of chromium in human hair.
