Development of a Highly Sensitive and Specific Immunoassay for Determining Chrysoidine, A Banned Dye, in Soybean Milk Film
作者:Hongtao Lei、Jin Liu、Lijun Song、Yudong Shen、Simon A. Haughey、Haoxian Guo、Jinyi Yang、Zhenlin Xu、Yueming Jiang、Yuanming Sun
DOI:10.3390/molecules16087043
日期:——
A highly specific and sensitive indirect competitive enzyme-linked immunosorbent assay (icELISA)was developed for the first time for the detection of chrysoidine, a dye banned in soybean milk film. Two haptens with different spacer arms were synthesized to produce antibodies. Both homologous and heterologous immunoassay formats were compared to enhance the icELISA sensitivity. The heterologous icELISA exhibited better performance, with an IC50 (50% inhibitory concentration) of 0.33 ng/mL, a limit of detection (LOD, 10% inhibitory concentration) of 0.04 ng/mL, and a limit of quantitation (LOQ, 20%–80% inhibitory concentration) from 0.09 to 4.9 ng/mL. The developed icELISA was high sensitive and specific, and was applied to determine chrysoidine in fortified soybean milk film samples. The results were in good agreement with that obtained by high-performance liquid chromatography (HPLC) analyses.
首次开发了高特异性、高灵敏度的间接竞争酶联免疫吸附试验(icELISA)用于检测豆浆膜禁用染料克苏啶。合成了两种不同间隔臂的半抗原产生抗体。比较异源免疫分析格式以提高 icELISA 灵敏度 异源 icELISA 表现出更好的性能,IC50(50% 抑制浓度)为 0.33 ng/mL,检测限(LOD,10% 抑制浓度)为 0.04 ng/mL。定量限(LOQ,20%–80% 抑制浓度)为 0.09 至 4.9 ng/mL。所开发的 icELISA 具有高灵敏度和特异性,可用于测定强化豆奶膜样品中的高粱碱。与高效液相色谱 (HPLC) 分析获得的结果非常吻合。