Determination of 13 synthetic food colorants in water-soluble foods by reversed-phase high-performance liquid chromatography coupled with diode-array detector.

Full Abstract

A reversed-phase high performance liquid chromatographic method for the successful separation and determination of 13 synthetic food colorants (Tartrazine E 102, Quinoline Yellow E 104, Sunset Yellow E 110, Carmoisine E 122, Amaranth E 123, Ponceau 4R E 124, Erythrosine E 127, Red 2G E 128, Allura Red AC E 129, Patent Blue V E 131, Indigo Carmine E 132, Brilliant Blue FCF E 133 and Green S E 142) was developed. A C18 stationary phase was used and the mobile phase contained an acetonitrile-methanol (20:80 v/v) mixture and a 1% (m/v) ammonium acetate buffer solution at pH 7.5. Successful separation was obtained for all the compounds using an optimized gradient elution within 29 min. The diode-array detector was used to monitor the colorants between 350 and 800 nm. The method was thoroughly validated. Detection limits for all substances varied between 1.59 (E 142) and 22.1 (E 124) microg L(-1). The intra-day precision (as R.S.D.(r)) ranged from 0.37% (E 122 in fruit flavored drink at a concentration of 100 mg L(-1)) to 4.8% (E 142 in icing sugar at a level of 0.9 mg kg(-1)). The inter-day precision (as R.S.D.(R)) was between 0.86% for E 122 in fruit flavored drink at 100 mg L(-1) and 10% for E142 in jam at a concentration of 9 mg kg(-1). Satisfactory recoveries, ranging from 94% (E 142 in jam) to 102% (E 131 in sweets), were obtained. The method was applied to the determination of colorants in various water-soluble foods, such as fruit flavoured drinks, alcoholic drinks, jams, sugar confectionery and sweets, with simple pre-treatment (dilution or water extraction).

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Author information

Author/s: Minioti, Katerina S (KS); Sakellariou, Christina F (CF); Thomaidis, Nikolaos S (NS);

Affiliation: Laboratory of Analytical Chemistry, Department of Chemistry, University of Athens, Panepistimioupolis Zografou, 15771 Athens, Greece.

Journal and publication information

Publication Type: Journal Article

Journal: Analytica chimica acta (Anal Chim Acta), published in Netherlands. (Language: eng)

Reference: 2007-Jan; vol 583 (issue 1) : pp 103-10

Dates: Created 2007/03/27; Completed 2007/06/08;

PMID: 17386533, status: MEDLINE (last retrieval date: 12/26/2008)

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Chromatography, High Pressure Liquid - methods
Chromatography, Liquid
Electrochemistry
Food Analysis
Food Coloring Agents - analysis; chemical synthesis; chemistry; isolation & purification

Associated Chemicals: Food Coloring Agents (0) ; Indicators and Reagents (0)

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