柠檬黄
苋菜
检出限
材料科学
雕刻
石墨烯
电化学
纳米颗粒
纳米技术
线性范围
化学
电极
色谱法
复合材料
食品科学
物理化学
作者
Jingjuan Wang,Juan Wu,Mimi Sun,Jing Bai,Xiangjie Bo
标识
DOI:10.1016/j.foodchem.2023.137611
摘要
This study presents the first integrated electrochemical platform (IEP) with point-of-use and portable features for on-site determination of ponceau 4R (RP), amaranth (AM), and tartrazine (TZ) in food by integrating a mass-producible Pt nanoparticles/laser-engraved graphene (Pt NPs/LEG)-based sensing chip and a reusable electrochemical miniaturized workstation. The sensing chip utilizes Pt NPs/LEG with unique architectures as electrode material and exhibits desirable analytical performance towards RP, AM, or TZ with satisfied linear range (0.25-50 μM for RP, AM, and TZ), high sensitivity (7.29 μA μM-1 cm-2, 7.18 μA μM-1 cm-2, and 2.02 μA μM-1 cm-2 for RP, AM, and TZ, respectively) and low limit of detection (50 nM, 58 nM, and 204 nM for RP, AM, and TZ, respectively). The sensing chip shows excellent selectivity, high stability, outstanding reproducibility, and acceptable mechanical stability. IEP can be implemented to test RP, AM, or TZ in real samples with satisfactory accuracy and recoveries.
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