Laboratory Medicine ›› 2015, Vol. 30 ›› Issue (5): 416-420.DOI: 10.3969/j.issn.1673-8640.2015.05.003

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Establishment on a LC-MS/MS and its performance characteristic evaluation for the determination of serum 25-hydroxyvitamin D

SONG Binbin, QIN Jiaqian, PENG Yingfei, ZHANG Chunyan, WU Jiong, WANG Beili, GUO Wei, PAN Baishen   

  1. Department of Clinical Laboratory, Zhongshan Hospital, Fudan University, Shanghai 200032, China
  • Received:2014-04-03 Online:2015-05-30 Published:2015-06-17

Abstract: Objective To establish a liquid chromatography-tandem mass spectrometry (LC-MS/MS) for the quantitation determination of serum 25-hydroxyvitamin D [25(OH)D] and perform the general method performance verification. Methods The LC-MS/MS was used for the quantitation determination of 25(OH)D2 and 25(OH)D3 in serum by Waters® XevoTM TQ MS ACQUITY UPLC® mass spectrometry instrument. According to US Food and Drug Administration (FDA)'s guideline (Guidance for Industry Bioanalytical Method Validation), the general method performance verification was performed for linearity, determination limit, precision and accuracy. Results The linear ranges of 25(OH)D2 and 25(OH)D3 were 6.25-500.00 nmol/L. The LC-MS/MS had quantitation determination limits of 2.50 nmol/L for 25(OH)D2 and 1.25 nmol/L for 25(OH)D3. The within-run and between-run coefficients of variation (CV) of 25(OH)D2 and 25(OH)D3 were <4% and <6%, respectively. The recovery rates were 93.26%-112.16%. The result of the Vitamin D External Quality Assessment Scheme (DEQAS) interlaboratory quality assessment had a bias <10%. Conclusions The basic performance of LC-MS/MS meets the evaluation standards, and LC-MS/MS is sensitive and accurate for detecting the concentrations of 25(OH)D2 and 25(OH)D3 in serum.

Key words: 25-hydroxyvitamin D, Liquid chromatography-tandem mass spectrometry, Performance verification

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