A novel potential primary method for quantification of enantiomers by high performance liquid chromatography-circular dichroism.

ABSTRACT: Primary methods play an important role in metrology. They can be used for the value assignment of certified reference materials, enabling the accuracy and comparability of the measurement. A novel potential primary method for enantiomer quantitation based on high-performance liquid chromatography-circular dichroism is described using L-phenylalanine as an example. The optimal quantitation range of L-Phe was from 0.1?mg/g to 1.2?mg/g, where both the relative bias and method variance were lower than 1%. The LOD and LOQ were 4??g/g and 30??g/g, respectively. The proposed method was also applied to the determination of the mass fraction of pure porcine insulin in solid. The average mass fraction obtained was 0.922?g/g with a RSD of 1.5%, and the associated relative uncertainty is 3.8% (k?=?2), which agreed well with that obtained from the traditional isotope dilution mass spectrometry method. The LOD and LOQ for insulin quantitation were found to be 0.12?mg/g and 0.44?mg/g, respectively. The proposed method can be entirely described and understood by equations and a complete uncertainty statement can be defined in SI units.Therefore, it may be a potential primary method useful for the quantification of chiral compounds and proteins, and a supplementary method to the traditional isotope dilution mass spectrometry approach.

SUBMITTER: Luo Y 

PROVIDER: S-EPMC5943587 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature