
Distribution of 25-hydroxyvitamin D3 in dried blood spots and implications for its quantitation by tandem mass spectrometry
Keywords: 25OHD3, 25-hydroxyvitamin D3; APCI, atmospheric pressure chemical ionization; DBS, dried blood spots; LC–MS/MS, liquid chromatography tandem mass spectrometryDried blood spots; 25-Hydroxyvitamin D; Punch location; Whatman 903; FTA; LC–MS/MS