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Fatibello-Filho O, Nóbrega JA, Moraes Guaritá-Santos AJ. Flow injection potentiometric determination of saccharin in dietary products with relocation of filtration unit. Talanta. 1994;41(5):731-4doi: 10.1016/0039-9140(93)e0018-9.
Fatibello-Filho, O., Nóbrega, J. A., & Moraes Guaritá-Santos, A. J. (1994). Flow injection potentiometric determination of saccharin in dietary products with relocation of filtration unit. Talanta, 41(5), 731-4. https://doi.org/10.1016/0039-9140(93)e0018-9
Fatibello-Filho, O, et al. "Flow injection potentiometric determination of saccharin in dietary products with relocation of filtration unit." Talanta vol. 41,5 (1994): 731-4. doi: https://doi.org/10.1016/0039-9140(93)e0018-9
Fatibello-Filho O, Nóbrega JA, Moraes Guaritá-Santos AJ. Flow injection potentiometric determination of saccharin in dietary products with relocation of filtration unit. Talanta. 1994 May;41(5):731-4. doi: 10.1016/0039-9140(93)e0018-9. PMID: 18965991.
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Talanta. 1994 May;41(5):731-4. doi: 10.1016/0039-9140(93)e0018-9.

Flow injection potentiometric determination of saccharin in dietary products with relocation of filtration unit.

Talanta

O Fatibello-Filho, J A Nóbrega, A J Moraes Guaritá-Santos

Affiliations

  1. Departamento de Química, Universidade Federal de São Carlos, Caixa Postal 676, CEP 13565-905, Sáo Carlos, SP, Brazil.

PMID: 18965991 DOI: 10.1016/0039-9140(93)e0018-9

Abstract

A flow injection potentiometric procedure for saccharin determination in dietary products is proposed. Saccharin is precipitated as mercurous saccharinate and the excess of the mercurous cation is potentiometrically measured using a silver wire coated with a mercury film as the working electrode. A filter unit is used to avoid contact between the precipitate and the electrode surface. With relocation in the flow manifold, the accumulated precipitate is removed on-line. Sucrose, glucose, aspartame, sodium cyclamate and sodium benzoate do not interfere when present in amounts similar to those observed in commercial products. Results are comparable with those obtained by UV-spectrophotometry and the correlation coefficient between methods is equal to 0.9930. A linear relationship between DeltaE (mV) and the logarithm of saccharin concentration was obtained in the saccharin concentration range 2 x 10(-3) - 1 x 10(-2)M. The sampling frequency is 60/hour and only 0.76 mg of Hg(2+)(2) is consumed in each determination.

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