Application of Isotopic Method to Identify the Sources of Nitrate in Freshwater: Principles, Biases, and Optimizations. - Liu, Deze; Song, Linlin; Wang, Xueyan; Zhou, Xulun; Wang, Fangna; Yu, Haoming; Duan, Yihang; Su, Chenxia; Tu, Ying; Wang, Ang (Water Environment Research (10614303), 2026)