Case Study
Direct Quantitation of 1a,25-dihydroxyvitamin D3in Serum using a Highly Sensitive LC-MS/MS System
Application Note: AN 120B Global Headquarters: 32 Nixon RD, Unit 1, Bolton ON, L7E 1W2, Canada. Email: info@ionics.ca, Phone: 1-905-857-5665, Fax: 1-905-857-3040, www.ionics.ca For Research Use Only Direct Quantitation of 1 a,25-dihydroxyvitamin D 3 in Serum using a Highly Sensitive LC-MS/MS System 1. Introduction Vitamin D (VD) promotes intestinal calcium absorption, bone matrix mineralization, normal muscle function and re