"Do it yourself" reference materials for δ13C determinations by isotope ratio mass spectrometry

被引:17
|
作者
Carter, J. F. [1 ]
Fry, B. [2 ]
机构
[1] Archerfield, Queensland Hlth Forens & Sci Serv, Brisbane, Qld 4109, Australia
[2] Griffith Univ, Australian Rivers Inst, Brisbane, Qld 4111, Australia
关键词
Stable isotope ratio measurements; Isotope ratio mass spectrometry; Reference materials; Quality assurance;
D O I
10.1007/s00216-013-6851-z
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
A method is described to prepare inexpensive organic reference materials for routine stable isotope work. The method blends isotope-enriched and isotope-depleted materials to match closely international measurement standards. Examples are presented showing how C-13-enriched and C-13-depleted glucose were blended to match the isotopic compositions of the international carbon isotope standards, NBS 19 and L-SVEC. Preparation of the blended standards was straightforward, and the prepared solutions proved easy to dispense into tin capsules and easy to combust in a conventional isotope analysis system. The blended materials allow a laboratory to perform a two-point calibration for isotopic composition on a daily basis, with the use of an international reference material recommended for routine quality assurance. The blending method can be applied widely to make isotope standards for other elements and compounds.
引用
收藏
页码:4959 / 4962
页数:4
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