DETERMINATION OF TRACE CHROMIUM IN BIOLOGICAL SAMPLES BY 2.5TH ORDER DIFFERENTIAL POLAROGRAPHIC ANALYSIS
- VernacularTitle:2.5次微分极谱法测定生物样品中痕量铬
- Author:
Xiaoli ZHANG
;
Lizeng WANG
;
Guangrong LIN
;
Kongli CHEN
- Publication Type:Journal Article
- Keywords:
chromium polarographic analysis
- From:
Acta Nutrimenta Sinica
1956;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
In NH4Cl-NH2CH2NH2-EDTA (pH = 9.0) supporting electrolyte containing cupferron, chromium( Ⅵ) complex with cupferron has a rather sensitive adsorptive wave. The reduction peak potential is -1.45V. The determination limit is 9,6?10-10mol/L. This method has been successfully used to samples of tea, grain and water.
