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Determination of the food dye carmine in milk and candy products by differential pulse polarography

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As a basis for the development of a sensitive analytical method for the determination of carmine food dye, a study of the differential pulse polarographic reduction of carminic acid (CA) on a dropping mercury electrode was performed. For the analytical differential pulse polarographic method running at pH 2.0 BrittoneRobinson (BeR) buffer solution (peak at
489 mV), the relationship between the peak current and CA concentration was linear in the range of 1 mM to 90 mM with a detection limit of 0.16 mM. The proposed electrochemical procedure was successfully applied to the determination of carmine food dye in spiked commercially available strawberry flavored milk. The method was extended to the determination of CA in candy and results were in agreement with that obtained by a spectrophotometric comparison method. A cyclic voltammogram of CA in 2.0 BeR buffer electrolyte was obtained on the dropping mercury electrode at pH 2.0 during potential scans from 0.00 mV to 1000 mV versus Ag/AgCl. From repetitive cyclic voltammograms,one cathodic peak at
500 mV and three anodic peaks on the reverse scan between approximately
340 mV and
460 mV were recorded. The influences of some other commonly found inorganic and organic salts on the determination of CA were also examined. The sufficiently good recoveries and low standard deviations for the data reflect the high accuracy and precision of the proposed differential pulse polarographic method.

Keywords:
Additive Carminic acid Electrochemical determination Polarography Trace

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Ketersediaan

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Informasi Detail

Judul Seri

j ournal of food and drug anal ys i s

No. Panggil

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Penerbit

: Elsevier Taiwan., 2014

Deskripsi Fisik

j ournal of food and drug anal ys i s 2 2 ( 2 0 1 4 ) 3 2 9 e3 3 5

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

-

Subjek

Food And Health

Info Detail Spesifik

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Pernyataan Tanggungjawab

Wati/Agus

Versi lain/terkait

Lampiran Berkas

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