The Determination of Nitrate and Nitrite in Human Urine and Blood by High-Performance Liquid Chromatography and Cloud-Point Extraction

Jiao Zhao1, Jun Wang2,3, Yaling Yang1* and Yunhui Lu4 Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China, Pittsburgh Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15213, USA, Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA, and The First People’s Hospital of Yunnan Province, Kunming 650228, China