Journal
ANALYTICA CHIMICA ACTA
Volume 605, Issue 1, Pages 41-45Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2007.10.034
Keywords
cloud point extraction; Sudan dyes; high performance liquid chromatography; chilli powder
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A CPE-HPLC (UV) method was developed for the determination of Sudan (I-IV) dyes, nonionic surfactant Triton X-100 was used to extract and preconcentrate Sudan dyes from chilli powder prior to their determination by HPLC-UV. The separation and determination of Sudan dyes was then carried out in the HPLC-UV system with isocratic elution, and the detector was set at 500 nm. The parameters and variables that affect the extraction were investigated. Under optimum conditions: 3% of Triton X-100 (W/V), 10% of Na2CO3 (W/V), heat-assisted at 70 degrees C for 30 min. Recoveries of the Sudan dyes ranged from 80.70% to 85.45% in chilli powder by CPE method, with all the relative standard deviations of less than 3%. Limit of detection (LOD) and limit of quantification (LOQ) were in the range of 2.0-4.0 and 7.0-12.0 mu g kg(-1) in chilli powder, respectively. (c) 2007 Elsevier B.V. All rights reserved.
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