Compound-specific carbon isotope ratio determination of enriched cholesterol.
Compound-specific carbon isotope ratio determination of enriched cholesterol.
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富集胆固醇的化合物特异性碳同位素比测定。
DOI:
10.1021/ac00063a006
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发表时间:
1993
影响因子:
7.4
通讯作者:
Schoeller,D
中科院分区:
文献类型:
--
作者:
Guo,ZK;Luke,AH;Lee,WP;Schoeller,D
On-line gas chromatography/combustion/isotope ratio mass spectrometry (GC/C/IRMS) was evaluated for use in stable isotope studies of human cholesterol metabolism. Calibration curves were constructed by analyzing underivatized and TMS-cholesterol over a range of 13C abundances from natural abundance to 0.05 mol of [3, 4-13C] choles-terol per mole of unlabeled cholesterol (S 13C-24 to 270% o). The calibration curves were highly linear (r* 12=0.99) with slopes of 0.98 and 0.88 for underivatized and TMS-cholesterol, respectively. Higher precision of 13C/12C ratio determination was obtained using TMS-cholesterol, with a detection limit (2 SD) of 0.3% o or 0.004 mol% of [3, 4-13C]-cholesterol. By comparison standard GC/MS had a detection limit of 0.06 mol% for [3, 4-13C] choles-terol. A 57-day study of cholesterol elimination was conducted in one human subject with oral administration of 50 mg of [3, 4-13C] cholesterol. Peak enrichment was 9% o above baseline (40 times the detection limit) and could be followed for 40-50 days. The results indicate that GC/C/IRMS provides 15-fold lower detection limits for [3, 4-13C]-choleseterol than GC/MS and is useful for human studies of cholesterol metabolism.
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影响因子:
6.5
作者:
W. Wong;D. Hachey;A. Feste;J. Leggitt;L. L. Clarke;W. Pond;P. Klein
通讯作者:
P. Klein
影响因子:
15.9
作者:
L. Hellman;R. Rosenfeld;M. L. Eidinoff;D. Fukushima;T. Gallagher;C. Wang;D. Adlersberg
通讯作者:
D. Adlersberg
DOI:
--
发表时间:
1991
期刊:
影响因子:
--
作者:
D. M. Jones;J. Carter;G. Eglinton;E. J. Jumeau;C. Fenwick
通讯作者:
C. Fenwick
影响因子:
7.1
作者:
S. Quarfordt
通讯作者:
S. Quarfordt
影响因子:
7.4
作者:
GOODMAN, KJ;BRENNA, JT
通讯作者:
BRENNA, JT