Measurement methods of total organic carbon in seawater Shuwei Zhang, Zhaoyu Wang, Xuejiao Yan, Jing Wang, Li Zhang, Qian Shi, Da Yuan, Ran Ma and Yan Liu E3S Web Conf., 233 (2021) 01078 Published online: 27 January 2021 DOI: 10.1051/e3sconf/202123301078