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首页> 外文期刊>International Journal of Electrochemical Science >Adsorptive Stripping Voltammetric Determination of Tartrazine and Sunset Yellow in Gelatins and Soft Drink Powder in the presence of Cetylpyridinium Bromide
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Adsorptive Stripping Voltammetric Determination of Tartrazine and Sunset Yellow in Gelatins and Soft Drink Powder in the presence of Cetylpyridinium Bromide

机译：溴化十六烷基吡啶存在下的吸附溶出伏安法测定明胶和软饮料粉中的酒石黄和日落黄

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摘要

The use of a hanging mercury drop electrode (HMDE) to determine tartrazine and sunset yellow ingelatins and soft drink powder by adsorptive stripping voltammetry in the presence of cetylpyridiniunbromide (CPB) is reported. With an HMDE it is possible to determine individually tartrazine andsunset yellow at pH values of 8.5 and 9.8, respectively. Under these conditions tartrazine was reduced at .60 V and sunset yellow at .65 V, and the linear calibration curves ranged from 6.600 gL and 3.360 gL , respectively. When CPB was added to the electrochemical cell, a tartrazine/CPBaggregate was formed, changing the reduction to 100 mV more negative potentials with a finer signal,while sunset yellow was reduced at almost the same potential (.55 V at pH 8.5) and the peak currentdecreased. Under these conditions the simultaneous determination of these dyes was possible. The limits of detection were 3.3 and 1.6 g L for tartrazine and sunset yellow, respectively (pH 8.5, ammonium buffer, Eads = .3 V and tads = 30 s) and the linear range was up to 100 gL for both. Themethod was validated using undyed gelatin spiked with tartrazine and sunset yellow. Finally, themethod was successfully applied to the determination of these dyes in lemon-, orange- and papaya- flavored gelatin and in a peach flavored soft drink powder.
机译：据报道，在十六烷基吡啶基十一溴化物（CPB）存在下，通过吸附溶出伏安法使用悬挂式汞滴电极（HMDE）测定酒石黄和日落黄色明胶和软饮料粉。使用HMDE可以分别测定pH值为8.5和9.8的酒石黄和夕阳黄。在这些条件下，酒石黄在0.60 V时降低，日落黄在.65 V时降低，线性校准曲线分别为6.600 gL和3.360 gL。当将CPB添加到电化学电池中时，形成了酒石黄/ CPB聚集体，将还原度更改为100 mV，并带有一个更精细的信号，从而产生了更多的负电势，而日落黄在几乎相同的电势下（pH 8.5时为0.55 V）降低了。峰值电流减小。在这些条件下，可以同时测定这些染料。酒石黄和日落黄的检测极限分别为3.3和1.6 g L（pH 8.5，铵缓冲液，Eads = .3 V和tads = 30 s），两者的线性范围均高达100 gL。使用掺有酒石黄和日落黄的未染色明胶验证了该方法。最终，该方法成功地用于测定柠檬味，橙味和木瓜味明胶以及桃味软饮料粉中的这些染料。

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