Determination of Trace Nitrobenzene in Water by Leach-Spectrophotometry
- VernacularTitle:水中微量硝基苯的萃取-分光光度测定法
- Author:
Jinquan GUO
- Publication Type:Journal Article
- Keywords:
Water;
Extraction;
Spectrophotometry;
Nitrobenzene
- From:
Journal of Environment and Health
1992;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To develop a rapid method for the determination of trace nitrobenzene in water. Methods In the acidic medium, the separation and enrichment of trace nitrobenzene in water by the technique of extraction-back extraction was done. With catalyst copper salt, nitrobenzene can be reduced into aniline and through the diazotization with hydrochloride naphthyl ethylenediamine, then form a stable purple complex which can be determined by spectrophotometry. Results The maximum absorption of the complex was at 540 nm and the molar absorptivity was ?540=2.6?104 L/(mol?cm). Beer’s law was obeyed in the range of 0.5～40 ?g/25 ml. The rates of recovery were 104.1%～109.1% and the lowest detectable concentration was 0.002 mg/L, RSDs
