Rapid determination of amino acid isomer is very important for the evaluation of the amino acid nutrition in different foods, so a fast and sensitive electrochemiluminescence (ECL) sensor was innovatively fabricated for the determination of tyrosine isomers in foods based on N-Acetyl-L-cysteine/upconversion nanomaterials possessed a good particular selectivity to L-tyrosine. Under the optimal conditions, for L-tyrosine, the limit of detection (LOD) of the sensor for L-tyrosine was 2.87 × 10−6 M, detection range of 5.5 × 10−5–5.5 × 10−3 M, for D-tyrosine, LOD was 2.56 × 10−5 M, detection range was from 5.5 × 10−4 to 5.5 × 10−3 M. The developed chiral sensor was used to determinate the tyrosine isomers in foods successfully, which provided a convenient method to quickly evaluate the nutritional value of amino acids in food.

中文翻译：

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基于N-乙酰-L-半胱氨酸/上转换纳米材料手性电化学发光传感器靶诱导淬灭快速测定食品中酪氨酸异构体


氨基酸异构体的快速测定对于评价不同食品中的氨基酸营养非常重要，因此创新性地制造了一种快速、灵敏的电化学发光 （ECL） 传感器，用于测定食品中酪氨酸异构体，该传感器基于对 L-酪氨酸具有良好的特殊选择性的 N-乙酰基-L-半胱氨酸/上转换纳米材料。在最佳条件下，对于 L-酪氨酸，传感器对 L-酪氨酸的检测限 （LOD） 为 2.87 × 10-6 M，检测范围为 5.5 × 10-5-5.5 × 10-3 M，对于 D-酪氨酸，LOD 为 2.56 × 10-5 M，检测范围为 5.5 × 10-4 至 5.5 × 10-3 M。开发的手性传感器用于成功测定食品中的酪氨酸异构体，为快速评价食品中氨基酸的营养价值提供了一种便捷的方法。