CN105092757A - 一种克林霉素磷酸酯的分析方法 - Google Patents

一种克林霉素磷酸酯的分析方法 Download PDF

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CN105092757A
CN105092757A CN201510473448.XA CN201510473448A CN105092757A CN 105092757 A CN105092757 A CN 105092757A CN 201510473448 A CN201510473448 A CN 201510473448A CN 105092757 A CN105092757 A CN 105092757A
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mobile phase
clindamycin phosphate
oxidation impurities
phosphate
acetonitrile
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CN105092757B (zh
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朱炜
张健
李志永
陈学文
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Suzhou Erye Pharmaceutical Co Ltd
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Abstract

本发明涉及一种克林霉素磷酸酯氧化杂质,其通过对克林霉素磷酸酯在双氧水中氧化得到。该分析方法操作简单,适合该杂质的快速检测。

Description

一种克林霉素磷酸酯的分析方法
技术领域
本发明涉及药物分析化学领域,特别涉及克林霉素磷酸酯氧化杂质的分析和制备方法。
背景技术
克林霉素磷酸酯属于克林霉素前药,其在体内可迅速水解为克林霉素而显示药理活性。相比于克林霉素,克林霉素磷酸酯具有抗菌活性高、吸收快、脂溶性及渗透性强、副作用少等特点。
克林霉素磷酸酯分子结构中含有磷酸酯键、硫甲基、卤素等活泼基团,易发生水解、氧化、取代、消除、重排等反应。分子中含有硫原子,易被氧化产生高价硫,或在酸性条件下磷酸酯键和硫甲基易水解。在碱性或受热时化合物容易产生卤素水解和消除反应。在上述降解过程中还会发生异构化反应。
由于克林霉素磷酸酯的稳定性低,因此对其稳定性和有关物质的充分研究对于保障药品安全至关重要。
发明内容
我们对克林霉素磷酸酯在酸破坏、碱破坏、热破坏、氧破坏以及光破坏下的的稳定性进行了研究。
母液的制备:精密称取克林霉素磷酸酯1882.48mg,置25ml量瓶中,加流动相A溶解并稀释至刻度,摇匀,室温放置,作为破坏性试验的母液。
a.酸破坏:精密吸取母液1ml,置25ml量瓶中,加入1ml1mol/L盐酸溶液,充分摇匀,室温下放置10h,用1ml1mol/L氢氧化钠溶液中和后,加流动相稀释至刻度,摇匀。
b.碱破坏:精密吸取母液1ml,置25ml量瓶中,加入1ml1mol/L氢氧化钠溶液,充分摇匀,室温下放置10h,用1ml1mol/L盐酸溶液中和后,加流动相稀释至刻度,摇匀。
c.热破坏:精密吸取母液1ml,置25ml量瓶中,加流动相稀释至刻度,摇匀,置100℃水浴中加热30min,取出,放冷至室温。
d.氧破坏:精密吸取母液1ml,置25ml量瓶中,加入2ml2%双氧水溶液,充分摇匀,室温下放置30min,加流动相稀释至刻度,摇匀。
e.光破坏:精密吸取母液1ml,置25ml量瓶中,5000lx照度下放置10小时,加流动相稀释至刻度,摇匀。
精密量取上述溶液各20μl注入液相色谱仪,并对各有关物质进行归属。
表1、破坏性试验样品的杂质与主成分含量(归一化法)及杂质归属
通过对比可以发现,样品在酸破坏、光照破坏条件下,杂质均没有明显变化;在碱破坏条件下,杂质G有所增加,有少量杂质A生成;在加热破坏条件下,有大量杂质F,杂质E生成,相对保留时间0.10,0.11,0.13,0.16,0.75处,均有少量杂质生成;在氧化破坏条件下,有大量杂质A生成,并且在相对保留时间0.33处有一个含量9.99%的未知杂质生成。
由于该氧化杂质含量较大,因此有必要对其进一步进行研究。
本发明涉及一种克拉霉素磷酸酯氧化杂质的分析方法:
(1)母液的制备:精密称取克林霉素磷酸酯1882.48mg,置25ml量瓶中,加流动相A溶解并稀释至刻度,摇匀,室温放置,作为破坏性试验的母液;
(2)氧化:精密吸取母液1ml,置25ml量瓶中,加入2ml2%双氧水溶液,充分摇匀,室温下放置30min,加流动相稀释至刻度,摇匀;
(3)分离:精密量取上述溶液20μl注入高效液相色谱仪,利用二维液相进行分析和检测:
A、一维液相色谱条件:
流动相A:0.1mol/L磷酸二氢钾溶液:乙腈=790:210,v/v
流动相B:0.1mol/L磷酸二氢钾溶液:乙腈=400:600,v/v
柱温30℃;
流速为每分钟1.1ml;
检测波长为210nm;
梯度洗脱条件:
时间(min) 流动相A 流动相B
0 100 0
13 100 0
18 50 50
39 50 50
40 100 0
50 100 0
B、二维液相色谱条件:
流动相A:0.1%甲酸
流动相B:乙腈
时间(min) 流动相A 流动相B
0 95 5
1 95 5
10 0 100
C、质谱:安捷伦Q-TOF电压:+175V
截取一维液相中较大的未知杂质,进入二维液相,起始1分钟冲去磷酸盐,再将样品冲入高分辨质谱仪,确定该氧化杂质的精确质量为521.1200,其元素组成为C18H35N2O9PSCl,结构为:
所述0.1mol/L磷酸二氢钾溶液采用450mg/mL的氢氧化钾溶液调pH值至6.0得到。
本发明的分析方法操作简便,非常适合克林霉素磷酸酯氧化杂质的快速检测。
附图说明
图1为克林霉素磷酸酯氧破坏后的LC-MS图谱。
具体实施方式
精密称取克林霉素磷酸酯1882.48mg,置25ml量瓶中,加流动相A溶解并稀释至刻度,摇匀,室温放置,作为破坏性试验的母液;
精密吸取母液1ml,置25ml量瓶中,加入2ml2%双氧水溶液,充分摇匀,室温下放置30min,加流动相稀释至刻度,摇匀;
精密量取上述溶液20μl注入高效液相色谱仪,利用二维液相进行分析和检测。
A、一维液相色谱条件:
流动相A:0.1mol/L磷酸二氢钾溶液(采用450mg/mL的氢氧化钾溶液调pH值至6.0得到):乙腈=790:210,v/v
流动相B:0.1mol/L磷酸二氢钾溶液(采用450mg/mL的氢氧化钾溶液调pH值至6.0得到):乙腈=400:600,v/v
柱温30℃;流速为每分钟1.1ml;检测波长为210nm;
梯度洗脱条件:
时间(min) 流动相A 流动相B
0 100 0
13 100 0
18 50 50
39 50 50
40 100 0
50 100 0
B、二维液相色谱条件:
流动相A:0.1%甲酸
流动相B:乙腈
时间(min) 流动相A 流动相B
0 95 5
1 95 5
10 0 100
质谱:安捷伦Q-TOF电压:+175V
截取一维液相中较大的未知杂质,进入二维液相,起始1分钟冲去磷酸盐,再将样品冲入高分辨质谱仪,确定该氧化杂质的精确质量为521.1200,其元素组成为C18H35N2O9PSCl,结构为:

Claims (6)

1.一种克林霉素磷酸酯氧化杂质,其结构为:
2.一种克林霉素磷酸酯氧化杂质的分析方法,其包括如下步骤:
(1)母液的制备:精密称取克林霉素磷酸酯1882.48mg,置25ml量瓶中,加流动相溶解并稀释至刻度,摇匀,室温放置,作为母液;
(2)氧化:精密吸取母液1ml,置25ml量瓶中,加入2ml2%双氧水溶液,充分摇匀,室温下放置30min,加流动相稀释至刻度,摇匀;
(3)分离:精密量取上述溶液20μl注入高效液相色谱仪,利用二维液相进行分析和检测,高分辨质谱确定该氧化杂质的精确质量为521.1200,其元素组成为C18H35N2O9PSCl,结构为:
3.根据权利要求2所述的克林霉素磷酸酯氧化杂质的分析方法,其特征在于:
A、一维液相色谱条件:
流动相A:0.1mol/L磷酸二氢钾溶液:乙腈=790:210,v/v;
流动相B:0.1mol/L磷酸二氢钾溶液:乙腈=400:600,v/v;
柱温30℃;
流速为每分钟1.1ml;
检测波长为210nm;
梯度洗脱条件:
B、二维液相色谱条件:
流动相A:0.1%甲酸;
流动相B:乙腈;
C:高分辨质谱:安捷伦Q-TOF,电压为+175V;
截取一维液相中较大的未知杂质,进入二维液相,起始1分钟冲去磷酸盐,再将样品冲入高分辨质谱仪。
4.根据权利要求2所述的克林霉素磷酸酯氧化杂质的分析方法,其特征在于:所述流动相为0.1mol/L磷酸二氢钾溶液:乙腈=790:210,v/v。
5.根据权利要求3或4所述的克林霉素磷酸酯氧化杂质的分析方法,其特征在于:所述0.1mol/L磷酸二氢钾溶液采用450mg/mL的氢氧化钾溶液调pH值至6.0得到。
6.根据权利要求3所述的克林霉素磷酸酯氧化杂质的分析方法,其特征在于:所述的较大的未知杂质的相对保留时间为0.33。
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CN106950290A (zh) * 2016-12-20 2017-07-14 宁夏多维药业有限公司 克林霉素磷酸酯凝胶中有关物质的检测方法
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CN112684056A (zh) * 2020-12-30 2021-04-20 海南海神同洲制药有限公司 一种克林霉素磷酸酯阴道片的含量测定方法
CN112684056B (zh) * 2020-12-30 2022-04-29 海南海神同洲制药有限公司 一种克林霉素磷酸酯阴道片的含量测定方法
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CN114354810B (zh) * 2022-01-04 2024-04-19 武汉九州钰民医药科技有限公司 克林霉素磷酸酯中杂质n的检测方法、及杂质的分离方法

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