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衍生化HPLC法测定酒石酸伐尼克兰中甲醛和乙二醛的含量

Determination of formaldehyde and glyoxal in varenicline tartrate using derivative method with HPLC

  • 摘要: 建立酒石酸伐尼克兰原料药和中间体中基因毒性杂质甲醛和乙二醛的检查方法。甲醛和乙二醛经2,4-二硝基苯肼衍生化,改善HPLC-UV检查的色谱保留和检测灵敏度。利用C8 (150 mm × 4.6 mm,5 μm)色谱柱,乙腈-水(50∶50)流动相进行线性梯度洗脱分离,在紫外光波长380 nm下进行检测,外标法测定供试品中的甲醛和乙二醛的含量。甲醛和乙二醛均在0.094 ~ 1.88 μg/L范围内线性关系良好,检测限和定量限分别达0.047 μg/mL (19 μg/g)和0.094 μg/mL (38 μg/g),平均回收率分别为(95.0 ± 1.1)%和(99.4 ± 2.6)%。经过方法学验证,本方法适用于酒石酸伐尼克兰原料药及其中间体中的微量基因毒性杂质甲醛和乙二醛的含量测定。伐尼克兰原料药及其中间体成品中甲醛和乙二醛的含量检查结果均符合每日允许最大摄入量的限度要求,而中间体粗品中乙二醛的含量易超出限度。研究所建立的方法可应用于酒石酸伐尼克兰生产工艺过程的质量控制。

     

    Abstract: To establish a method for the determination of formaldehyde and glyoxal simultaneously in varenicline tartrate active pharmaceutical ingredient (API) and its intermediate, formaldehyde and glyoxal were derivatized by 2, 4-dinitrophenylhydrazine (2,4-DNPH) to improve the HPLC retention and UV detection sensitivity. Separation was performed on a C8 (150 mm × 4.6 mm, 5 μm) column by linear gradient elution using acetonitrile and water as the mobile phase; the detective wavelength was set at 380 nm.Formaldehyde and glyoxal were quantitatively determined by an external reference method.Linear calibration was established for both formaldehyde and glyoxal in the range from 0.094 to 1.88 μg/mL.The detection and the quantification limits were 0.047 μg/mL (19 μg/g) and 0.094 μg/mL (38 μg/g), respectively.The recoveries were (95.0±1.1)% and (99.4 ± 2.6)% for formaldehyde and glyoxal, respectively.This method has been fully validated to be applicable to quantitative analysis of trace amount of formaldehyde and glyoxal in varenicline tartrate API and its intermediate.Test results demonstrated that the contents of both formaldehyde and glyoxal met the permitted daily exposure (PDE) limits for the finished products of varenicline tartrate API as well as its intermediate, though the glyoxal contents in the crude intermediates were likely to exceed the limit.The established method is valuable for the manufacturing process and quality control of varenicline tartrate.

     

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