Determination of anthraquinones in urine samples by pH-dependent solidified floating liquid-liquid microextraction-HPLC
DU Xuehong,XIN Xiaoying,WANG Jipeng,ZHANG Hongyi,YANG Bing
Journal of Hebei University (Natural Science Edition) . 2018, (6): 596 -602 .  DOI: 10.3969/j.issn.1000-1565.2018.06.007