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铵氮(NH_4~+)、硝态氮(NO_3~-)、亚硝态氮(NO_2~-)是水质污染的重要指标。方法有比色、紫外分光光度、气相色谱、化学发光、脉冲极谱、离子选择电极等。本文提出了一种简便地测定水中三种氮化物(铵氮、硝态氮、亚硝态氮)的分析方法。这种同时测定三种氮化物的简易方法,尚未见有报道。实验与讨论 1.仪器与试剂:氨气敏电极。PHS-3型酸度计。节瓦尔德合金(即定氮合金)上海试剂一厂生产,后用纯铝(99.999％)、纯铜(99.999％)、纯锌(99.999％)在真空充氩气氛下
Ammonium nitrogen (NH 4 +), nitrate nitrogen (NO 3 -) and nitrite nitrogen (NO 2 -) are important indicators of water pollution. Methods are colorimetric, UV spectrophotometry, gas chromatography, chemiluminescence, pulsed polarography, ion-selective electrode. This paper presents a simple method for the determination of three nitrides in water (ammonium nitrogen, nitrate, nitrite). This simple method for the simultaneous determination of three nitrides has not been reported yet. Experimental and discussion 1. Instruments and reagents: ammonia gas sensing electrode. PHS-3 type acid meter. After the production of pure aluminum (99.999%), pure copper (99.999%) and pure zinc (99.999%),