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首页> 外文期刊>Analytica chimica acta >A new tool for inorganic nitrogen speciation study: Simultaneous determination of ammonium ion, nitrite and nitrate by ion chromatography with post-column ammonium derivatization by Nessler reagent and diode-array detection in rain water samples
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A new tool for inorganic nitrogen speciation study: Simultaneous determination of ammonium ion, nitrite and nitrate by ion chromatography with post-column ammonium derivatization by Nessler reagent and diode-array detection in rain water samples

机译：无机氮形态研究的新工具：通过离子色谱法同时测定纳秒勒试剂柱和柱后铵离子，同时测定雨水样品中的二极管阵列，同时测定铵离子，亚硝酸根和硝酸根

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The paper presents a new method for a simultaneous determination of inorganic nitrogen species in the oxidized (NO2-, NO3-) and reduced (NH4+) form in rain water samples. The method is based on a system of nitrogen species separation employing ion exchange and diode-array detection. The ions are separated in a strong ion-exchanger, nitrites and nitrates are determined directly at 208 and 205 nm, respectively, while the ammonium ions are determined in the column hold-up time after a post-column derivatization by the Nessler reagent, at 425 nm. The use of a diode-array detector permits a simultaneous identification of the inorganic nitrogen species in 8 min. The detection limits obtained are: NO2-, 0.1 mg L-1; NO3-, 0.05 mg L-1; NH4+, 1 mg L-1. The method proposed has been successfully used for speciation analysis of inorganic nitrogen in precipitation. (c) 2006 Elsevier B.V. All rights reserved.
机译：本文提出了一种同时测定雨水样品中氧化态（NO2-，NO3-）和还原态（NH4 +）中无机氮种类的新方法。该方法基于采用离子交换和二极管阵列检测的氮物质分离系统。离子在强离子交换器中分离，亚硝酸盐和硝酸盐分别直接在208和205 nm处测定，而铵离子在Nessler试剂进行柱后衍生后，在柱保留时间中在425纳米二极管阵列检测器的使用允许在8分钟内同时识别无机氮物种。获得的检出限为：NO2-，0.1 mg L-1; NO 3-0.05 mg L-1; NH4 +，1 mg L-1。所提出的方法已成功用于降水中无机氮的形态分析。 （c）2006 Elsevier B.V.保留所有权利。

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