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首页> 外文期刊>Talanta: The International Journal of Pure and Applied Analytical Chemistry >Spectrophotometric multicomponent determination of sunset yellow, tartrazine and allura red in soft drink powder by double divisor-ratio spectra derivative, inverse least-squares and principal component regression methods
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Spectrophotometric multicomponent determination of sunset yellow, tartrazine and allura red in soft drink powder by double divisor-ratio spectra derivative, inverse least-squares and principal component regression methods

机译：双除数比光谱导数，最小二乘反方和主成分回归法分光光度法测定饮料粉中的日落黄，酒石黄和诱惑红

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摘要

Double divisor-ratio spectra derivative (graphical method), classical least-squares and principal component regression (two numerical methods) methods were developed for the spectrophotometric multicomponent analysis of soft drink powders and synthetic mixtures containing three colorants without any chemical separation. The graphical method is based on the use of derivative signals of the ratio spectra using double divisor. In this method, the linear determination ranges were 2-8 μg ml~(-1) sunset yellow, 4-18 μg ml~(-1) tartrazine and 2-8 μg ml~(-1) allura red in 0.1 M HCl. In the numerical methods, a training set was randomly prepared by using 18 samples containing between 0 and 8 μg ml~(-1) of sunset yellow, 0-18 μg ml~(-1) of tartrazine and 0-8 μg ml~(-1) of allura red. The chemometric calibrations were calculated by using the prepared training set and its absorbances at seven points (from 375.0 to 550.0 nm) in the spectral region 325-584 nm. The proposed methods were validated by using synthetic ternary mixtures and applied to the simultaneous determination three colorants in soft drink powders. The obtained results were statistically compared with each other.
机译：开发了双除数比光谱导数（图形方法），经典最小二乘法和主成分回归（两种数值方法）方法，用于分光光度法对软饮料粉和含有三种着色剂的合成混合物进行分光光度多组分分析，而无需进行任何化学分离。图形方法基于使用双除数的比率光谱的导数信号。该方法的线性测定范围是在0.1 M HCl中为2-8μgml〜（-1）日落黄，4-18μgml〜（-1）酒石黄和2-8μgml〜（-1）艳红。 。在数值方法中，通过使用18个样本随机准备训练集，其中包含0至8μgml〜（-1）的日落黄，0-18μgml〜（-1）的酒石黄和0-8μgml〜 （-1）极光红。通过使用准备的训练集及其在光谱区325-584 nm的七个点（从375.0到550.0 nm）的吸光度，计算化学计量学校准值。通过使用合成的三元混合物验证了所提出的方法，并将其用于同时测定软饮料粉中的三种着色剂。将获得的结果进行统计学比较。

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