A rapid method is described for quantification of six illegal colorants in beverages, i.e., soft beverages, energy beverages, alcoholic beverages, teas, and fruit juices. Paper spray (PS) ionization combined with tandem mass spectrometry (MS/MS) allowed detection of particular dyes in times of less than 1 min per sample. Samples where diluted in methanol and isotopically-labeled internal standards were utilized to obtain linear responses over ranges of two or three orders of magnitude. The LODs were below 1.5 ng mL⁻¹ and LOQs were below 5 ng mL⁻¹. Quality control experiments gave accuracies that ranged between 80% and 120%. Matrix effects were evaluated for different samples but had little effect given the use of the dilution method.

中文翻译：

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纸喷雾电离质谱法快速定量非法饮料染料

描述了一种用于定量饮料中的六种非法着色剂的快速方法，这些饮料即软饮料，能量饮料，酒精饮料，茶和果汁。纸喷雾（PS）电离与串联质谱（MS / MS）相结合，每个样品的检测时间少于1分钟。利用在甲醇和同位素标记的内标物中稀释的样品获得两个或三个数量级范围内的线性响应。LOD低于1.5 ng mL ^-1，LOQ低于5 ng mL ^-1。质量控制实验得出的准确度在80％到120％之间。评价了不同样品的基质效应，但考虑到使用稀释法的影响很小。