Department of Chemistry,Fuzhou University,Fuzhou,Fujian,350002,China;
College of Chemistry and Chemical Engineering,Southwest China Normal University,Chongqing,400715,China;
Analytical and Testing Center,Fuzhou University;
Fuzhou,Fujian,350002,China;
Department of Chemistry,Fuzhou University,Fuzhou,Fujian,350002,China;
heparin; chemically modified electrode; lead; differential pulse anodic stripping;