Utilization of Polyurethane Foams in Sorption–Photometric Analysis

Дмитриенко, С. Г.; Kosyreva, Olga A.; Runov, V. K.; Zolotov, Yury A.

doi:10.1070/mc1991v001n02abeh000046

Cited by 19 publications

(8 citation statements)

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“…The possibility of this combination was first discussed by Dmitrienko and coworkers. 63,64 It was shown 25 that PUF offer a number of advantages over other sorbents regarding their use in sorption ± photometric and sorption ± luminescence procedures and in test methods. First of all, this facilitates the final stage of analysis because the sorbate can be easily separated from other components present in the sorption system, which looks like a coloured tight pellet; owing to the uniform distribution of the analyte over the sorbent matrix, PUF pellets can be used without any additional operations.…”

Section: Diffuse Reflection Spectroscopymentioning

confidence: 99%

Polyurethane foams in chemical analysis: sorption of various substances and its analytical applications

Дмитриенко¹,

Zolotov²

2002

Russ. Chem. Rev.

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Section: Diffuse Reflection Spectroscopymentioning

confidence: 99%

Polyurethane foams in chemical analysis: sorption of various substances and its analytical applications

Дмитриенко¹,

Zolotov²

2002

Russ. Chem. Rev.

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“…An approach combining preconcentration by PUF and direct determination on the sorbent by thin layer spectrophotometry [11], diffuse reflectance spectroscopy [12,13,14,15,16,17], luminescence [18,19,20,21] or X-ray fluorescence [22] also seems promising.…”

Section: Introductionmentioning

confidence: 99%

“…One approach is based on the sorption of colored compounds formed by an analytical reagent and the test component in the analyzed solution. This approach has been applied to metal ions [12], phenols [13], 1-naphthol [16], and cationic [14] and anionic [15] surfactants. Another approach is based on the use of loaded PUF.…”

Section: Introductionmentioning

confidence: 99%

Polyurethane foams as solid chromogenic reagents for diffuse reflectance spectroscopy

Дмитриенко

et al. 2002

Analytical and Bioanalytical Chemistry

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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.

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“…Great achievements in this area are presented in a monograph 1 and reviews. [2][3][4] To describe the sorption of metal acidocomplexes, some mechanisms (a cation-chelated mechanism, ligand connection or exchange and extraction 1,5 ) are proposed.…”

mentioning

confidence: 99%

“…Our previous studies [5][6][7][8][9][10][11] allowed us to conclude that the mechanism of extraction by PUFs depends on both the nature of the sorbed compound (this is rather obvious) and the chemical structure of the monomer unit of the polymers: based on ethers (R 1…”

mentioning

confidence: 99%