Zhao Yao-Qiang, He You-Zhao, Gan Wu-Er, Yang Li
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
Talanta. 2002 Mar 11;56(4):619-25. doi: 10.1016/s0039-9140(01)00624-5.
A new sequential injection analysis (SIA) method of an electrokinetic flow analysis (EKFA) system for the determination of nitrite-nitrogen is presented in this paper. The proposed system mainly consisted of an electroosmotic pump, two solenoid valves and a spectrophotometer etc. All the pump and valves were controlled by a personal computer automatically. The determination method of nitrite-nitrogen was based on the reaction among nitrite, sulfanilamide and naphthylethylenediamine to form a colored compound, which was measured at 540 nm. The linear calibration range of nitrite-nitrogen was 10-800 mug l(-1). The detection limit was 1 mug l(-1) (K=3, n=11). The analytical method can provide a throughput of 33 samples per h.
本文介绍了一种用于测定亚硝酸盐氮的电动流动分析（EKFA）系统的新型顺序注射分析（SIA）方法。所提出的系统主要由一个电渗泵、两个电磁阀和一台分光光度计等组成。所有的泵和阀门均由个人计算机自动控制。亚硝酸盐氮的测定方法基于亚硝酸盐、磺胺和萘乙二胺之间的反应形成一种有色化合物，该化合物在540nm处进行测量。亚硝酸盐氮的线性校准范围为10 - 800μg l⁻¹。检测限为1μg l⁻¹（K = 3，n = 11）。该分析方法每小时可提供33个样品的通量。
