Improved sensitivity of serum/plasma 1α,25-dihydroxyvitamin D quantification by DAPTAD derivatization
Keywords: 1α,25-Dihydroxyvitamin D; Liquid chromatography-tandem mass spectrometry; 4-(4â²-Dimethylaminophenyl)-1,2,4-triazoline-3,5-dione; Immunoaffinity extraction; Pre-analytical validation; Clinical applications;