Objective To establish a method for the determination of N-Sulfo-glucosamine potassium salt by reversed-phase high performance liquid chromatography (RP-HPLC) with online pre-column derivation in health food. Methods Online pre-column derivation were reacted by using phthalic dicarboxaldehyde (OPA) derived reagents and amino of N-Sulfo-glucosamine potassium salt. The products were separated by C18 column with 0.68% acetic acid buffer: methanol (V:V=82:18) as mobile phase, the flow rate of 1.0 mL/min, and detection wavelength of 340 nm. Results D-glucosamine hydrochloride concentration had a good linearity in the range of 0.052~1.045 mg/mL. The average recovery rate was 97.5%, RSD%=1.2 (n=9). Conclusion The method is high, simple and accurate, and can be used to determine the content of N-Sulfo-glucosamine potassium salt in pharmaceutics and health food.
标题:反相高效液相色谱柱前在线衍生法测定氨基葡萄糖硫酸钾盐的含量
英文标题:Determination of N-Sulfo-glucosamine potassium salt by reversed-phase high performance liquid chromatography with online pre-column derivation