Determination of para red, Sudan dyes, canthaxanthin, and astaxanthin in animal feeds using UPLC.
A simple high-performance liquid chromatography method was developed for quantitative determination of para red, Sudan I, Sudan II, Sudan III, Sudan IV, canthaxanthin, and astaxanthin in feedstuff. The sample was extracted using acetonitrile and cleaned up on a C(18) SPE column. The residues were analyzed using ultra-performance liquid chromatography coupled to a diode array detector at 500 nm. The mobile phase was acetonitrile-formic acid-water with a gradient elution condition. The external standard curves were calibrated. The mean recoveries of the seven colorants were 62.7-91.0% with relative standard deviation 2.6-10.4% (intra-day) and 4.0-13.2% (inter-day). The detection limits were in the range of 0.006-0.02 mg/kg.
Hou
Xiaolin
X
Department of Animal Science, Beijing University of Agriculture, Beijing, PR China, 102206.
Li
Yonggang
Y
Wu
Guojuan
G
Wang
Lei
L
Hong
Miao
M
Wu
Yongnin
Y
D000821:Animal Feed / Q000032:analysis*; D001391:Azo Compounds / Q000032:analysis*; D016644:Canthaxanthin / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005505:Food Coloring Agents / Q000032:analysis*; D057230:Limit of Detection; D009284:Naphthols / Q000032:analysis; D024341:Xanthophylls / Q000032:analysis
D001391:Azo Compounds; D005505:Food Coloring Agents; D009284:Naphthols; D024341:Xanthophylls; C024336:1-phenylazo-2-naphthol; D016644:Canthaxanthin; C033003:sudan red; C005948:astaxanthine; C009213:Scarlet Red; C033006:sudan III