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Subject: search.filters.subject.25 Hydroxy Vitamin D

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    CHALLENGES IN VITAMIN D ANALYSIS
    (SCIENDO, 2012-01-01) Serteser, Mustafa; Coskun, Abdurrahman; Inal, Tamer C.; Unsal, Ibrahim
    Vitamin D is an important determinant for the regulation of calcium and phosphorus levels and mineralization of the bone. The most reliable indicator of vitamin D status is the measurement of plasma or serum 25OH-D concentration. Several studies reported discrepancies between the results of assays. These high variabilities in 25OH-D measurements are due to used assay technologies and lack of standardization against the reference materials. Different assays have been employed for the measurement of 25OH-D levels: Competitive Protein Binding Assays, immunoassays, direct detection methods. Choosing an assay platform is important both for clinical laboratory professionals and researchers, and several factors affect this process. Recently, liquid chromatography and tandem mass spectrometry is an alternative method to traditional assays and provides higher specificity and sensitivity than many assays