Determination of Trace Cadmium in River Water by Victoria Pure Blue BO-Iodide Spectrophotometry
- VernacularTitle:测定水体中镉的维多利亚艳蓝BO-碘分光光度法
- Author:
Wenjian SHI
;
Haifeng WEN
;
Mengcheng PENG
- Publication Type:Journal Article
- Keywords:
Laboratory techniques and procedures;
Water;
Cadmium;
Spectrophotometry
- From:
Journal of Environment and Health
1992;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish a new method for determination of trace cadmium in river water. Methods Cadmium in river water was separated and enriched with sulfhydryl cotton, in the presence of 4?10~3 % emulsifier OP and H3PO4-NaH2PO4 water solution, Victoria Pure Blue BO reacted with [CdI4]2- forming an ionic-associated complex and the color of the solution changed from yellow to pure blue, and the content of trace cadmium in river water was determined by spectrophotometry. Results When cadmium was enriched fifty times, the apparent molar absorptivity of the associated complex was ?=2.79?10_5 L/(mol?cm). Beer's law was obeyed in the range 2-100 ?g/L. The recovery rate and RSD of the method was 96.2%-98.6% and 2.5% respectively. Conclusion The method was accurate and sensitive,and was suitable for determination of trace cadmium in river water.
