Determination of nitrate in environmental water samples by conversion into nitrophenols and solid phase extraction-spectrophotometry, liquid chromatography or gas chromatography-mass spectrometry

被引：36

作者：

Lohumi, N

Gosain, S

Jain, A

Gupta, VK

Verma, KK ^{[1
]}

机构：

[1] Rani Durgavati Univ, Dept Chem, Jabalpur 482001, India

[2] Ravishankar Shukla Univ, Dept Chem, Chhattisgarh, India

来源：

ANALYTICA CHIMICA ACTA | 2004年 / 505卷 / 02期

关键词：

nitrate; solid phase extraction; UV-Vis spectrophotometry; liquid chromatography; gas chromatography-mass spectrometry; water samples;

D O I：

10.1016/j.aca.2003.10.060

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Conversion of nitrate into a nitro-phenol derivative by reaction with 2-methylphenol or 2,6-dimethylphenol allowed at least 100-fold enrichment of the derivative on Lichrolut EN polymeric cartridge, and it is stable for up to 1 month on the cartridge. The derivative could be eluted with ammonia-methanol mixture. This reaction for nitrate determination has permitted a choice of final measurement by UV-Vis spectrophotometry, liquid chromatography or gas chromatography-mass spectrometry when the limits of detection were 10, 6 and 3 mug l(-1), respectively, and the calibration range 20 mug to 10 mg l(-1) nitrate. The method has been validated by spiking natural water samples, when the recovery of nitrate was 98.5-108.4% (relative standard deviation 2.5-6.1%). (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：231 / 237

页数：7

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