Abstract：The differential pulse stripping voltammetric(DPSV) method was developed,to determine hree colorants,sunset yellow,amaranth and tartrazine.The method proposed was based on the adsorptive accumulation of the colorants on the carbon electrode,and the oxidation of the absorptive species by the voltammetry.The 40.0×10-6 mol·L-1 of cetyltrimethyl ammonium bromide(CTAB) was used as the optimal for the experiment.The linear concentration ranges were found to be 4.0-40.0,5.0-60.0 and 2.5-35.0 nmol·L-1,for sunset yellow,amaranth and tartrazine,respectively.Their corresponding detection limits were 1.54,2.38 and 1.10 nmol·L-1.Since the voltammograms of these colorants were seriously overlapped,it was difficult to determine them individually from the voltammetric signals of the mixtures.Thus,some chemometrics methods,such as partial least squares(PLS),principle component regression(PCR) and their first-order derivative methods(DPLS and DPCR),were applied to quantitatively resolve the overlapping signals in this paper.We found that the DPLS gave the best results with total relative prediction error(RPET) of 6.18 %.The method was applied to determine three colorants in several commercial food samples,like soft drink,ice cream and candy samples,and yielded satisfactory recoveries.
钟永生； 桂怿； 倪永年. 基于表面活性剂存在下电化学结合化学计量学同时测定3种着色剂[J]. 南昌大学学报（理科版）, 2012, 36(02): 147-149.
ZHONG Yong-shenga,b,CUI Yia,b,NI Yong-niana,. Simultaneous differential pulse stripping voltammetric determination of three food colorants in presence of CTAB with aid of chemometrics. , 2012, 36(02): 147-149.
2012, Vol. 36 
