A rapid screening procedure for cholesterol and dehydrocholesterol by electrospray ionization tandem mass spectrometry.
[5] Nonstandard abbreviations: SLOS, Smith-Lemli-Opitz syndrome; GC-MS, gas chromatography-mass spectrometry; DHC, dehydrocholesterol; ES, electrospray; MS/MS, tandem MS/MS; GP, Girard P; LC, liquid chromatography; [MS.sup.2], [[M].sup.+][right arrow]; [MS.sup.3], [[M].sup.+][right arrow][[M-79].sup.+][right arrow]; RIC, reconstructed ion chromatogram; MRM, multiple reaction monitoring.