Study on the Degradation Effect of Three Organophosphorus Hydrolase Mutant on Sarin Qiamin Gu, Chuanxin Zhao, Hailing Xi, Min Liu and Gaoyun Chen E3S Web Conf., 271 (2021) 03054 Published online: 15 June 2021 DOI: 10.1051/e3sconf/202127103054