CN113281290A - 一种氨甲环酸制剂含量的测定方法 - Google Patents
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Abstract
本发明公开了一种氨甲环酸制剂中主药含量的测定方法,以水为溶液,在220nm的波长处采用紫外分光光度法测定样品的吸光度,以外标法计算氨甲环酸制剂中主药的含量。本发明的测定方法采用紫外分光光度法,以外标法测定氨甲环酸含量,经验证现行良好,结果准确,可靠;且当多批次需同时进行检测时可以大幅降低检验成本,缩短检验时间,并减少实验过程中出现因现有实验方法复杂、步骤繁琐带来的差错,提高检测效率。
Description
技术领域
本发明涉及化学分析技术领域,尤其涉及一种氨甲环酸制剂中主药含量的测定方法。
背景技术
氨甲环酸是合成的氨基酸类抗纤溶药,其主要作用机制是通过抑制蛋白溶酶和纤维蛋白溶酶原的激活,达到止血效果。临床药品有氨甲环酸片、氨甲环酸注射液和氨甲环酸胶囊。此外,研究发现氨甲环酸可抑制由紫外线照射导致的色素沉积,达到美白祛斑的疗效。目前在临床上氨甲环酸已作为治疗黄褐斑的药物。氨甲环酸作为祛斑剂,可添加至祛斑美白类化妆品中。氨甲环酸还是宣称祛黄褐斑的保健食品中的非法添加物质。氨甲环酸既是药物又是化妆品原料,测定氨甲环酸的含量具有意义。
现执行标准为中国药典2020年版二部标准,采用HPLC测定含量,此方法中以0.23%十二烷基硫酸钠溶液(取磷酸二氢钠18.3g,加水800ml溶解,加三乙胺8.3ml混匀后,再加入2.3g十二烷基硫酸钠,振摇使溶解,用磷酸调节pH至2.5,加水至1000ml)-甲醇(60∶40)为流动相,流动相配置繁琐,其中含有十二烷基硫酸钠与三乙胺等表面活性剂,还需调节pH值,对流动相的平衡提出了非常高的要求,提高了检测技术的门槛,此外检测波长为220nm在HPLC中,很接近200nm的截止波长,在水中溶解,因水的极性非常大,容易造成溶剂与辅料的干扰。
发明内容
本发明为解决现有检测方法中存在的实验方法复杂、步骤繁琐、检测效率低的缺陷,提出一种氨甲环酸制剂含量的测定方法。
为实现上述目的,本发明采用以下技术方案:
本发明提供一种氨甲环酸制剂中主药含量的测定方法,水为溶液,在220nm的波长处采用紫外分光光度法测定样品的吸光度,以外标法计算氨甲环酸制剂中主药的含量。
进一步地,所述的氨甲环酸制剂中主药含量的测定方法,包括如下步骤:
(1)供试液的配制:取氨甲环酸原料药或其制剂,约相当于氨甲环酸50mg,精密称定,置25ml量瓶中,加水溶解并稀释至刻度,摇匀,滤过;
(2)对照液的配制:取氨甲环酸对照品25mg,精密称定,置25ml量瓶中,水溶解并稀释至刻度,摇匀;
(3)取上述供试液与对照液,分别采用紫外光光度法于最大波长处测定吸光度,以外标法计算含量即得。
进一步优选地,所述紫外分光光度法为:参照紫外-可见分光光度法(中国药典2015年版四部通则通则0401),在272nm的波长处分别测定吸光度。
进一步优选地,步骤(1)中所述氨甲环酸制剂为氨甲环酸片或氨甲环酸胶囊。
进一步优选地,步骤(3)中将所述供试液的pH值调节为5.4-5.8后,再进行紫外分光光度检测,且在检测过程中控制温度在40-45℃。
本发明采用上述技术方案,与现有技术相比,具有如下技术效果:
本发明的氨甲环酸制剂含量测定方法,其采用紫外分光光度法,以外标法测定氨甲环酸含量,经验证现行良好,结果准确,可靠;且当多批次需同时进行检测时可以大幅降低检验成本,缩短检验时间,并减少实验过程中出现因现有实验方法复杂、步骤繁琐带来的差错,提高检测效率。
附图说明
图1为采用本发明方法的氨甲环酸含量检测的线性曲线图。
具体实施方式
下面通过具体实施例对本发明进行详细和具体的介绍,以使更好的理解本发明,但是下述实施例并不限制本发明范围。
实施例
提供一种氨甲环酸制剂中主药含量的测定方法,包括步骤:
(1)供试液的配制:取氨甲环酸原料药,约相当于氨甲环酸50mg,精密称定,置25ml量瓶中,加水溶解并稀释至刻度,摇匀,滤过;
(2)对照液的配制:取氨甲环酸对照品25mg,精密称定,置25ml量瓶中,水溶解并稀释至刻度,摇匀;
(3)取上述供试液与对照液,分别采用紫外光光度法在220nm的波长处测定吸光度,以外标法计算含量即得。
在本实施例中,所述紫外分光光度法为:参照紫外-可见分光光度法(中国药典2015年版四部通则通则0401),在272nm的波长处分别测定吸光度。
在本实施例中,步骤(3)中采用中国药典2020年四版通则0401紫外-可见分光光度法测定吸光度。
在本实施例中,作为一个优选方案,步骤(3)中将所述供试液的pH值调节为5.4-5.8后,再进行紫外分光光度检测。且在检测过程中控制检测温度在40-45℃。
方法验证
(1)对照储备液的制备:
取氨甲环酸对照品50mg,置25ml量瓶中,加水溶解并稀释至刻度,摇匀。
(2)供试液的制备:
浓度1.精密量取对照储备液2ml置10ml量瓶中,水稀释至刻度,摇匀。
浓度2.精密量取对照储备液3ml置10ml量瓶中,水稀释至刻度,摇匀。
浓度3.精密量取对照储备液5ml置10ml量瓶中,水稀释至刻度,摇匀。
浓度4.精密量取对照储备液6ml置10ml量瓶中,水稀释至刻度,摇匀。
浓度5.精密量取对照储备液8ml置10ml量瓶中,水稀释至刻度,摇匀。
(3)测定法:取上述各溶液,照紫外-可见分光光度法(中国药典2020年版四部通则通则0401),在220nm的波长处分别测定吸光度A。
(4)评价标准:按下表1所示的标准浓度对检测的吸光度进行线性回归,建立氨甲环酸含量测定的标准曲线方程,如图1所述,回归方程r不小于0.999。
表1含量线性范围确认数据
(5)结论:经验证,氨甲环酸含量在25%~160%之间线性良好,线性符合标准,方法验证成功。
相比现有的HPLC测定方法,本发明采用紫外分光光度法,任何检验员按照此方法操作,在紫外分光光度计上均会测得相同的数据,与对照品测得的数据对比,采用外标法来计算含量,准确,可靠;且采用水介质无需事先准备,且比上述流动相大幅降低检验成本;此外,紫外数据的秒读与人为滴定相比较毫无疑问更节约时间,解放检验员在操作过程中思想高度集中的压力,同时也避免了HPLC中门槛较高带来的差错的发生,在大批量检验上准确度、效率与成本上的优势则体现的更加明显。
以上对本发明的具体实施例进行了详细描述,但其只是作为范例,本发明并不限制于以上描述的具体实施例。对于本领域技术人员而言,任何对本发明进行的等同修改和替代也都在本发明的范畴之中。因此,在不脱离本发明的精神和范围下所作的均等变换和修改,都应涵盖在本发明的范围内。
Claims (3)
1.一种氨甲环酸制剂中主药含量的测定方法,其特征在于,以水为溶液,在220nm的波长处采用紫外分光光度法测定样品的吸光度,以外标法计算氨甲环酸制剂中主药的含量。
2.根据权利要求1所述的氨甲环酸制剂中主药含量的测定方法,其特征在于,包括如下步骤:
(1)供试液的配制:取氨甲环酸原料药或其制剂,约相当于氨甲环酸50mg,精密称定,置25ml量瓶中,加水溶解并稀释至刻度,摇匀,滤过;
(2)对照液的配制:取氨甲环酸对照品25mg,精密称定,置25ml量瓶中,水溶解并稀释至刻度,摇匀;
(3)取上述供试液与对照液,分别采用紫外光光度法于最大波长处测定吸光度,以外标法计算含量即得。
3.根据权利要求2所述的氨甲环酸制剂中主药含量的测定方法,其特征在于,所述紫外分光光度法为:参照紫外-可见分光光度法(中国药典2015年版四部通则通则0401),在272nm的波长处分别测定吸光度。
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童菲: "氨甲环酸有关物质及其含量分析方法的研究", 《中国优秀硕士学位论文全文数据库 (医药卫生科技辑)》, no. 5, 31 May 2011 (2011-05-31), pages 079 - 19 * |
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