Michael J. Varley

Measurement of 25-hydroxyvitamin D2, 25-hydroxyvitamin D3, 24,25-dihydroxyvitamin D2 and 25,26-dihydroxyvitamin D2 in a single plasma sample by mass fragmentography

Ruth D. Coldwell, D.J.H. Trafford, Michael J. Varley et al. · Clinica Chimica Acta · 1989 · 40 citations

Medicine, Endocrinology, Mass Spectrometric Analysis +7

Specific estimation of 24,25-dihydroxyvitamin D in plasma by gas chromatography-mass spectrometry.

Ruth D. Coldwell, D.J.H. Trafford, H.L.J. Makin et al. · Clinical Chemistry · 1984 · 38 citations · Full text

Agriculture, Biochemistry, Chromatographic Analysis +16

Specific mass fragmentographic assay for 25,26-dihydroxyvitamin D in human plasma using a deuterated internal standard

Ruth D. Coldwell, D.J.H. Trafford, H.L.J. Makin et al. · Journal of Chromatography B Biomedical Sciences and Applications · 1985 · 22 citations

Medicine, Biochemistry, Endocrinology +14

Synthesis of tryptophan stereoselectively labelled with tritium and deuterium in the β-methylene group; the steric course of hydroxylation in sporidesmin biosynthesis

Gordon W. Kirby, Michael J. Varley · Journal of the Chemical Society Chemical Communications · 1974 · 22 citations

Natural Sciences, Biochemistry, Chemistry +7

The measurement of vitamins D2 and D3 and seven major metabolites in a single sample of human plasma using gas chromatography/Mass Spectrometry

Ruth D. Coldwell, D.J.H. Trafford, Michael J. Varley et al. · Journal of Mass Spectrometry · 1988 · 22 citations

Life Sciences, Biochemistry, Nutritional Sciences +17