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產(chǎn)品詳細介紹

USGS41L-glutamic aid Inorganic   Pure Substance

This reference material was prepared by Qi et al. [1] from commercially available L-glutamic acids which were dissolved in water and mixed with small amounts of L-glutamic acids isotopically enriched in δ13C or in δ15N. The solution was dried again and packaged. Its recommended δ13C value was determined in an international calibration [2].

(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)

References:

1. QI, H., COPLEN, T.B., GEILMANN, H., BRAND, W.A., B?HLKE, J.K., Two new organic reference materials for δ13C and δ15N measurements and a new value for the δ13C of NBS 22 oil, Rapid Commun. Mass Spectrom. 17 (2004) 2483-2487.

2. COPLEN, T.B., BRAND, W.A., GEHRE, M., GR?NING M., MEIJER, H.A.J., TOMAN, B., VERKOUTEREN, R.M., New Guidelines for 13C Measurements, Anal. Chem. 78 7 (2006) 2439-2441.