Polyurethane foams as solid chromogenic reagents for diffuse reflectance spectroscopy

被引：31

作者：

Dmitrienko, SG ^{[1
]}

Sviridova, OA ^{[1
]}

Pyatkova, LN ^{[1
]}

Senyavin, VM ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Chem, Div Analyt Chem, Moscow 119992, Russia

来源：

ANALYTICAL AND BIOANALYTICAL CHEMISTRY | 2002年 / 374卷 / 03期

关键词：

polyurethane foams; nitrite and nitrate determination; IR spectroscopy; diffuse reflectance spectroscopy;

D O I：

10.1007/s00216-002-1513-6

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

The chemical reactions of the functional groups in polyurethane foams (PUF) have been studied by use of diffuse reflectance spectroscopy and infrared spectroscopy. It was found that the functional groups are highly reactive towards diazotization by sodium nitrite, azo coupling with 4-nitrophenyldiazonium tetrafluoroborate, oxidation by active chlorine, and condensation with formaldehyde, resulting in the formation of intensely colored products. Heterogeneous chemical reactions of PUF with these compounds in aqueous solution proceed rapidly at room temperature and at low solute concentrations. PUF do not undergo degradation as a result of chemical interactions. The linear response of the Kubelka-Munk function to analyte concentration makes it possible to recommend PUF as solid chromogenic reagents for the determination of nitrite, nitrate, and 1- and 2-naphthols.

引用

页码：361 / 368

页数：8

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