Document Detail


A simple method for simultaneous determination of basic dyes encountered in food preparations by reversed-phase HPLC.
MedLine Citation:
PMID:  22320095     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
The present method utilizes a simple pretreatment step, cleanup on polyamide SPE cartridges, and HPLC resolution on reversed-phase C18 for the detection of the three basic nonpermitted dyes encountered in food matrixes. Polyamide cartridges were chosen because both acidic and basic dyes can be cleaned up due to their amphoteric nature. Analysis was performed on a reversed-phase C18 micro-Bondapak column using the isocratic mixture of acetonitrile-sodium acetate with a flow rate of 1.5 mL/min and a programmable lambda(max) specific visible detection to monitor colors, achieving higher sensitivity and expanded scope to test multicolor blends. All the colors showed linearity with the regression coefficient, from 0.9983 to 0.9995. The LOD and LOQ ranged between 0.107 and 0.754 mg/L and 0.371 and 2.27 mg/L or mg/kg, respectively. The intraday and interday precision gave good RSDs, and percentage recoveries in different food matrixes ranged from 75 to 96.5%. The study demonstrates that the use of a combination of a simple SPE cleanup and HPLC resolution with UV-Vis end point detection was successful in screening the presence of these three basic nonpermitted dyes individually or in blend, in a variety of food matrixes.
Authors:
Sumita Dixit; Subhash K Khanna; Mukul Das
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of AOAC International     Volume:  94     ISSN:  1060-3271     ISO Abbreviation:  J AOAC Int     Publication Date:    2011 Nov-Dec
Date Detail:
Created Date:  2012-02-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9215446     Medline TA:  J AOAC Int     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1874-81     Citation Subset:  IM    
Affiliation:
Council of Scientific and Industrial Research, Indian Institute of Toxicology Research, Food Toxicology Division, Mahatma Gandhi Marg, PO Box 80, Lucknow - 226001, Uttar Pradesh, India.
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