Novel rapid coordination of ascorbic acid 2-phosphate and iron(III) as chromogenic substrate system based on Fe2O3 nanoparticle and application in immunoassay for the colorimetric detection of carcinoembryonic antigen

Xuwei Chen, Xuan Zheng, Xiangyong Yu, Xiaoqin Li, Youxiu Lin, Huizi Lin, Shuai Ye, Xinyu Huang, Dianping Tang, Wenqiang Lai