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- W830244358 abstract "AIM To establish a chiral precolumn derivatization method for testing the optical purity of L-carnosine. METHODS Enantiomers as a pair of non-chiral derivative was derivatized from ortho-phthalaldehyde/N-acety-L-cysteine (OPA/NAC) as chiral derivatization agent which was carried out on a CI8 (250mm×4.6mm, 5μm) column at 35℃ with a mixture of 50 mmol•L^(-1) acetate buffer (pH=6.0) - methanol (70:30, V/V) as mobile phase with a flow rate of 1.0mL•min^(-1); with fluorescence detector at λ(subscript ex)=350nm and λ(subscript em)=450nm. RESULTS The separation grade was greater than 3.0 between L-carnosine and its enantiomers within the range of 0.104 to 2.68mg•L^(-1). The peak chromato-area of D-carnosine and its concentration showed good linear correlation, and the limit of detection (LOD) was 0.02 mg•L^(-1). CONCLUSION The established chiral derivatization HPLC testing method is simple and accurate for the optical purity control of L-carnosine." @default.
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- W830244358 date "2010-01-25" @default.
- W830244358 modified "2023-09-23" @default.
- W830244358 title "手性衍生化-反相高效液相色谱法测定L-肌肽的光学纯度" @default.
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