新—阶导数双峰光谱法解析及应用──测定NO_3~－和NO_2~－

Analysis and Application of New First Order Derivative Dual peak Spectrometry-The Determination of NO_3￣- and NO_2￣-

本文通过对ＮＯ３－和ＮＯ２－的一阶导数光谱研究，提出利用它们各自导致光谱峰值的两种解析方法测定相互干扰的两组份含量，由于利用尽可能最大信息量和导数谱的特有功能，使测定ＮＯ３－和ＮＯ２－灵敏度分别为０．００５μｇ／ｍＬ、０．００９μｇ／ｍＬ（峰高－截矩比ｆ校正系数法）及０．００４μｇ／ｍｌ、０．００６μｇ／ｍＬ（双峰ｋ系组合导致法），线性范围皆为０～１．０μｇ／ｍＬ方法用于水样分析，结果令人满意。

In this paper, first order derivative spectrometry of NO and NO is studied. Two analytical methods for detection the of contents of two components which influence each other with derivative peak values are put forward. Using possiblly maximum information and special function of derivative spectromery, detection limits reach 0. 005μg/mL (NO), 0. 009μg/mL (NO) in peak value and ratio of the intercept f coefficoent correction method and 0. 004μg/mL (NO), 0. 006μg/mL. (NO) in dual peak k-coefficient-the combined derivative spectrometry method, respectively. Both linear ranges are o- 1. 0μg/mL The two proposed methods are applied to water samples for determination of NO and NO with satisfactory results.