气相分子吸收光谱法与纳氏试剂分光光度法测定水中氨氮的比较

Comparison Study of Gas Phase Molecular Absorption Spectrometry and Nessler's Reagent Spectrophotometry on Ammonia Nitrogen Determination

在实际监测工作中,采用传统的纳氏试剂分光光度法测定水中氨氮,测定结果容易受到pH、悬浮物、色度、浊度等因素的干扰。用气相分子吸收光谱法与纳氏试剂分光光度法分别对具有以上各种干扰因素的代表性水样进行测定,结果证实,经过前处理去除干扰后的纳氏试剂分光光度法和气相分子吸收光谱法的测定值具有一致性。气相分子吸收光谱法具有抗干扰能力强、准确度精密度高、使用试剂简单无毒、高效智能等优势。

In actual monitoring, the measurements of ammonia nitrogen by traditional Nessler＇s reagent spectrophotometry are affected by pH, suspended solids, chroma, turbidity and other factors. The representative water samples with the above interference factors were determined by gas phase molecular absorption spectroscopy and Nessler＇s reagent spectrophotometry respectively. The results showed consistent measurements between Nessler＇s reagent spectrophotometry and gas phase molecular absorption spectroscopy after pre-treatment to eliminate interference. Gas phase molecular absorption spectrometry has the advantages of strong anti-interference ability, high accuracy and precision, simple and non-toxic reagents and high efficiency.