摘要
目的:建立罗氟司特有关物质测定的HPLC方法。方法:采用十八烷基硅烷键合硅胶为填料的色谱柱,以0.01 mol·L^(-1)磷酸二氢钾溶液(磷酸调节p H至3.5±0.1)为流动相A,乙腈为流动相B,梯度洗脱,流速0.5 m L·min^(-1),柱温为25℃,检测波长为215 nm,对有关物质进行定性、定量分析。结果:罗氟司特和相邻杂质以及各杂质之间的分离度均大于1.5;3-环丙基甲氧基-4-二氟甲氧基苯甲酸(杂质A)、4-氨基-3,5-二氯吡啶(杂质B)、3-(环丙基甲氧基)-N-(3,5-二氯吡啶-4-基)-4-羟基苯甲酰胺(杂质C)、3-羟基-N-(3,5-二氯吡啶-4-基)-4-(二氟甲氧基)苯甲酰胺(杂质D)、3,4-二羟基-N-(3,5-二氯吡啶-4-基)苯甲酰胺(杂质E)、3-(环丙基甲氧基)-N-(吡啶-4-基)-4-(二氟甲氧基)苯甲酰胺(杂质F)、3-(环丙基甲氧基)-N-(3-氯吡啶-4-基)-4-(二氟甲氧基)苯甲酰胺(杂质G)、3-(二氟甲氧基)-N-(3,5-二氯吡啶-4-基)-4-(环丙基甲氧基)苯甲酰胺(杂质H)、3,4-二(环丙基甲氧基)-N-(3,5-二氯吡啶-4-基)苯甲酰胺(杂质I)、3,4-二(二氟甲氧基)-N-(3,5-二氯吡啶-4-基)苯甲酰胺(杂质J)和罗氟司特氮氧化物(杂质K)在各自的线性范围内线性关系良好(r>0.999 0,n=5),相对校正因子分别为1.14、1.00、1.17、0.96、0.70、1.76、1.08、1.37、1.14、1.65和1.22,检测限分别为0.1、0.03、0.1、0.1、0.1、0.03、0.1、0.1、0.1、0.1和0.1 ng;定量限分别为0.3、0.1、0.3、0.2、0.2、0.1、0.2、0.2、0.2、0.3和0.3 ng,低、中、高3种浓度的平均回收率(n=9)分别为102.9%、100.0%、107.6%、107.5%、98.1%、99.9%、98.3%、97.6%、86.9%、100.0%和98.7%。5批样品有关物质测定结果显示,各已知杂质的含量均低于0.1%,其他最大单个杂质的含量均低于0.1%,杂质总量均低于0.5%。结论:本方法可用于罗氟司特的有关物质测定。
Objective: To establish an HPLC method for the determination of related substances in roflumilast raw material. Methods: HPLC was adopted on a Cls column with a gradient elution system of acetonitrile 0.01 mol L-1 potassium dihydrogen phosphate solution( pH was adjusted to 3.5 ± 0.1 with phosphate acid ) with a flow rate of 0.5 mL min-1, and the column temperature was maintained at 25 ℃, the detection wavelength was set at 215 nm. The related substances were qualified and quantified by the established method. Results: The resolutions between roflumilast and adjacent impurities, and between the known impurities were greater than 1.5. The calibration curves of 11 known impurities were linear in the concentration range ( r〉0.999 0, n=5 ). The relative correction factors were 1.14, 1.00, 1.17, 0.96, 0.70, 1.76, 1.08, 1.37, 1.14, 1.65 and 1.22 for 3- ( cyclopropylmethoxy ) -4- ( difluoromethoxy ) benzoic acid ( impurity A ), 3,5-dichloropyridin-4-amine ( impurity B ), 3- ( cyelopropylmethoxy ) -N- ( 3,5-dichloropyridin-4-yl ) -4-hydroxybenzamide ( impurity C ), N- ( 3, 5-diehloropyridin-4-yl ) -4- ( difluoromethoxy ) -3-hydroxybenzamide ( impurity D ), N- ( 3,5-dichloropyridin- 4-yl ) -3,4-dihydroxybenzamide ( impurity E ), 3- ( cyclopropylmethoxy ) -4- ( difluoromethoxy ) -N- ( pyridin- 4-yl ) benzamide ( impurity F ), N- ( 3-chloropyridin-4-yl ) -3- ( cyclopropylmethoxy ) -4- ( difluoromethoxy ) benzamide ( impurity G ), 4- ( eyelopropylmethoxy ) -N- ( 3,5-dichloropyridin-4-yl ) -3- ( difluoromethoxy ) henzamide ( impurity H ), 3,4-his ( cyelopropylmethoxy ) -N- ( 3,5-dichloropyridin-4-yl ) henzamide ( impurity I ) , N- ( 3,5-dichloropyridin-4-yl ) -3,4-his ( difluoromethoxy ) benzamide ( impurity J ) and roflumilast oxynitride ( impurity K ), rspectively; The deteetion limits were 0.1,0.03,0.1,0.1,0.1,0.03,0.1,0.1,0.1, 0.1 and 0.1 ng, and the quantitation limits were 0.3,0.1
出处
《药物分析杂志》
CAS
CSCD
北大核心
2017年第6期1097-1106,共10页
Chinese Journal of Pharmaceutical Analysis