SPECTROPHOTOMETRIC DETERMINATION OF UREA AND AMMONIA IN NATURAL WATERS WITH HYPOCHLORITE AND PHENOL

被引：24

作者：

EMMET, RT

机构：

[1] Naval Ship Research and Development Laboratory, Annapolis Division, Annapolis

来源：

ANALYTICAL CHEMISTRY | 1969年 / 41卷 / 12期

关键词：

D O I：

10.1021/ac60281a007

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Colored compounds formed from urea and ammonia with absorbancy maxima at 454 and 630 mμ, respectively, may be used to determine micromolar quantities of those compounds in natural waters. Optimal procedures yield molar absorbance indices of 4.4×103 for urea and 5.6×103 for ammonia in distilled water and of 8.0×10s for urea and 3.6×103 for ammonia in seawater. The lower limits of detection of both compounds in seawater are 0.2 μg-atom nitrogen per liter, and both relative standard deviations in seawater are about 10% at a nitrogen concentration of 1 μg-atom per liter. © 1969, American Chemical Society. All rights reserved.

引用

页码：1648 / &

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