Research Article

Interference-free determination of carmine in food samples using ultrasonic assisted cloud point extraction coupled with spectrophotometry

Volume: 40 Number: 2 June 30, 2019
EN TR

Interference-free determination of carmine in food samples using ultrasonic assisted cloud point extraction coupled with spectrophotometry

Abstract

In this study, a simple, green and cost effective method of extraction and preconcentration of carmine used as a food additive in some food samples was developed using ultrasonic assisted cloud point extraction (UA-CPE) before spectrophotometric determination. Carmine was extracted from the aqueous solution using polyoxyethylenesorbitan monolaurate (Tween 20) as the extraction solvent in presence of Ni(II) at pH 6.5. Variables such as pH, amount of metal, temperature, ultrasonic effect, solvent type, type and concentration of nanionic surfactant have been optimized in detail. Under the optimum conditions, the analytical characteristics of the method are as follows; linear working range 1.5-350 μg L-1; the detection limit, 0.4 μg L-1; and preconcentration factor, 80. The relative standard deviation (RSD%) obtained for the 10 μg L-1 concentration (n: 5) of carmine was 3.7%. Recovery values for two different concentration levels were in the range of 94.8-104.7%. The accuracy and precision of the method were evaluated by intra- and inter-day studies. Finally, the method has been successfully applied to the determination of carmine in various foods.

Keywords

References

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Details

Primary Language

English

Subjects

-

Journal Section

Research Article

Publication Date

June 30, 2019

Submission Date

November 22, 2018

Acceptance Date

February 4, 2019

Published in Issue

Year 2019 Volume: 40 Number: 2

APA
Elik, A. (2019). Interference-free determination of carmine in food samples using ultrasonic assisted cloud point extraction coupled with spectrophotometry. Cumhuriyet Science Journal, 40(2), 305-316. https://doi.org/10.17776/csj.486753

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