Determination of Nitrate Nitrogen in Water With Hydrazine Sulfate-NEDD Spectrophotometry
- VernacularTitle:水中硝酸盐氮的硫酸肼-N-(1-萘基)乙二胺盐酸分光光度测定法
- Author:
Baoliang LI
;
Shujian LI
- Publication Type:Journal Article
- Keywords:
Water;
Nitrates;
Spectrophotometry;
Hydrazine sulfate
- From:
Journal of Environment and Health
1989;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To make a accurate, simple method for determination which is suitable for application in basic level units to test nitrate nitrogen in drinking water. Methods Based on the principle that catalyzed by the Cu2+, NO3- is reduced by hydrazine sulfate into NO2-, then it reacts on sulfanilamide in hydrochloric acid to produce a diazo compound, the latter reacts on NEDD to produce a rose dye. Results The maximum wave-length of the was 555 nm, the molar absorption coefficient was 6.5?106L/(mol?cm), RSD were 0.55%-2.07%, the rates of recovery were 91.3%-109.6%. Beer's law was obeyed in the range of 40-320 ?g/L(1-8 ?g /25 ml). Conclusion This method is simple, rapid, accurate and suitable for application in basic level units to determine nitrate nitrogen in drinking water.
