Research Article

Simultaneous Quantification of 25-Hydroxyvitamin D3 and 24,25-Dihydroxyvitamin D3 in Rats Shows Strong Correlations between Serum and Brain Tissue Levels

Figure 4

Production mass spectra of 25(OH)D3-PTAD (a) and 24,25(OH)2D3-PTAD (b).
(a)
(b)