Simultaneous determination of seven organophosphorus pesticide residues and their stability in animal-derived foods with liquid chromatography–tandem mass spectrometry - Xilong Liu; Keying Feng; Wenzi Liu; Chubiao Huang; Zishuo Liu; Huajie Lao; Qiqi Liang; Hongkai Wu; Huangzhong Ding; Xiangguang Shen (Food Chemistry, 2026)