Key Laboratory of Analytical Chemistry for Biology and Medicine(Ministry of Education);
Department of Chemistry;
Wuhan University;
Wuhan 430072;
China;
Key Laboratory of Analytical Chemistry of State Ethnic Affairs Commission;
College of Chemistry and Materials Science;
South-Central University for Nationalities;
Wuhan 430074;
China;
Pharmaceutical College;
Guangxi Medical University;
Nanning 530021;
China;
Amino acids; Dried blood spots; Stable isotope derivatization; LC-MS; Newborn screening;