Rapid quantification of epigoitrin in the extraction process of Radix Isatidis using near infrared spectroscopyCaixia Li, Wenjing Huang, Qian Wang, Zhiwei Huang and Shikai YanE3S Web Conf., 233 (2021) 02020DOI: https://doi.org/10.1051/e3sconf/202123302020