Article(id=1308817688177238614, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1308817633789698171, articleNumber=null, orderNo=null, doi=10.16438/j.0513-4870.2025-1172, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1759161600000, receivedDateStr=2025-09-30, revisedDate=1763049600000, revisedDateStr=2025-11-14, acceptedDate=null, acceptedDateStr=null, onlineDate=1789976053518, onlineDateStr=2026-09-21, pubDate=1770825600000, pubDateStr=2026-02-12, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789976053518, onlineIssueDateStr=2026-09-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789976053518, creator=13701087609, updateTime=1789976053518, updator=13701087609, issue=Issue{id=1308817633789698171, tenantId=1146029695717560320, journalId=1189982191388893191, year='2026', volume='61', issue='2', pageStart='321', pageEnd='676', issueExtLink='null', onlineDate='null', pubDate='1770825600000', pubDateStr='2026-02-12', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1789976040551, creator='13701087609', updateTime=1789984264575, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1308852127921963901, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1308817633789698171, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1308852127921963902, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1308817633789698171, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=569, endPage=576, ext={EN=ArticleExt(id=1308817688370176599, articleId=1308817688177238614, tenantId=1146029695717560320, journalId=1189982191388893191, language=EN, title=Discovery and exploration of trace unknown impurities in low concentration epinephrine injections, columnId=1190335348761793317, journalTitle=Acta Pharmaceutica Sinica, columnName=Original Articles, runingTitle=null, highlight=null, articleAbstract=
During the development and analysis of low-concentration epinephrine injections, two unreported trace impurities (impurity H and impurity M) have been newly identified. Their analysis and identification were particularly difficult due to their low content, poor stability, and difficult separation in some cases. For impurity H with short retentiontime, poor separation, low content and poor stability, a two-dimensional liquid chromatography-tandem mass spectrometry (2DLC-MS/MS) with column switching technique was employed. This enabled on-line separation, desalination and structure characterization. In contrast, impurity M which exhibits better separability and stability, was isolated and prepared through enrichment and concentration processes. Its structure was then identified using techniques such as liquid chromatography-high resolution mass spectrometry (LC-HRMS) and NMR, enabling the acquisition of more comprehensive structural information. Experimental results showed that impurity H achieved effective separation in the first-dimensional chromatography and successful on-line desalination and fraction cutting in the second-dimensional chromatography. Its potential chemical structure was deduced through multi-stage mass spectrometry data analysis. For impurity M, efficient enrichment and concentration were accomplished; its structure was further confirmed by combining molecular weight and fragment information from LC-HRMS with spectral data from NMR. This study compared the performance of 2DLC-MS/MS with column switching technology with the traditional impurity concentration and identification technology. The experimental results not only provide a valuable strategy for analyzing and identifying trace impurities in complex matrix samples, but also offer an effective analytical tool for the quality control of trace impurities in low concentration epinephrine injections.
, authors=Xiang LI
1, 2, Ya MENG
2, Xiao-chuan TAN
2, Yu-jia ZHANG
2, Guang-zhi SHAN
3, Xu-dong WANG
4, Hong-zhuo LIU
1, *, Wen-sheng ZHENG
2, *, authorsList=Xiang LI, Ya MENG, Xiao-chuan TAN, Yu-jia ZHANG, Guang-zhi SHAN, Xu-dong WANG, Hong-zhuo LIU, Wen-sheng ZHENG, authorCompany=null, correspAuthors=Hong-zhuo LIU, Wen-sheng ZHENG, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2026 Acta Pharmaceutica Sinica. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1308817692233130608, articleId=1308817688177238614, tenantId=1146029695717560320, journalId=1189982191388893191, language=CN, title=低浓度肾上腺素注射液中微量未知杂质的发现与探究, columnId=1190335348896011050, journalTitle=药学学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
在低浓度肾上腺素注射液开发研究中新发现了两个未见报道的微量杂质(分别命名为杂质H、杂质M), 其含量低、稳定性差、分离困难等使分析鉴定的挑战极大。对于保留时间短、分离度差、含量低、稳定性差的杂质H, 采用2DLC-MS/MS柱切换技术在线分离、脱盐与采用质谱结构鉴定; 对于分离度、稳定性较好的杂质M通过富集、浓缩的方法分离制备, 通过LC-HRMS、NMR等技术进行结构鉴定, 从而获得更丰富的结构信息。杂质H在一维和二维色谱中分别实现了良好分离、脱盐及在线切割, 并通过多级质谱数据分析鉴定了其可能的结构。另外成功富集、浓缩了杂质M, 并通过LC-HRMS分子质量及碎片信息及NMR数据等确证了杂质M的结构。两个研究对比了2DLC-MS/MS柱切换技术与传统的杂质浓缩鉴定技术, 为复杂基质样品中微量杂质的分析鉴别提供了思路, 同时也为低浓度肾上腺素注射液中微量杂质的质量控制提供了有效的方法。
, authors=李想
1, 2, 孟雅
2, 谭晓川
2, 张宇佳
2, 山广志
3, 王旭东
4, 刘洪卓
1, *, 郑稳生
2, *, authorsList=李想, 孟雅, 谭晓川, 张宇佳, 山广志, 王旭东, 刘洪卓, 郑稳生, authorCompany=null, correspAuthors=刘洪卓, 郑稳生, authorNote=
作者贡献:
李想负责部分实验、杂质数据统计和文章的撰写及修改工作; 孟雅负责实验指导; 谭晓川、张宇佳负责文章的思路指导及审阅; 山广志、王旭东负责质谱氢谱的相关实验及结果统计; 刘洪卓、郑稳生教授负责最终定稿工作。
, correspAuthorsNote=
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1Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110000, China
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1沈阳药科大学无涯创新学院, 辽宁 沈阳 110000
2中国医学科学院北京协和医学院, 药物研究所, 药物传输技术及新型制剂北京市重点实验室, 北京 100050, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1308817961343869509, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, xref=1, ext=[AuthorCompanyExt(id=1308817961352258118, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, companyId=1308817961343869509, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1沈阳药科大学无涯创新学院, 辽宁 沈阳 110000)]), AuthorCompany(id=1308817961427755592, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, xref=2, ext=[AuthorCompanyExt(id=1308817961436144201, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, companyId=1308817961427755592, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2中国医学科学院北京协和医学院, 药物研究所, 药物传输技术及新型制剂北京市重点实验室, 北京 100050)])]), Author(id=1308817961952043608, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, orderNo=1, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1308817962031735386, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, authorId=1308817961952043608, language=EN, stringName=Ya MENG, firstName=Ya, middleName=null, lastName=MENG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2Beijing Key Laboratory of Drug Delivery Technology and Novel Formulation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1308817962098844251, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, authorId=1308817961952043608, language=CN, stringName=孟雅, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2中国医学科学院北京协和医学院, 药物研究所, 药物传输技术及新型制剂北京市重点实验室, 北京 100050, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1308817961427755592, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, xref=2, ext=[AuthorCompanyExt(id=1308817961436144201, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, companyId=1308817961427755592, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2中国医学科学院北京协和医学院, 药物研究所, 药物传输技术及新型制剂北京市重点实验室, 北京 100050)])]), Author(id=1308817962186924637, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1308817962262422111, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, authorId=1308817962186924637, language=EN, stringName=Xiao-chuan TAN, firstName=Xiao-chuan, middleName=null, lastName=TAN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2中国医学科学院北京协和医学院, 药物研究所, 药物传输技术及新型制剂北京市重点实验室, 北京 100050, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1308817961427755592, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, xref=2, ext=[AuthorCompanyExt(id=1308817961436144201, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, companyId=1308817961427755592, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2中国医学科学院北京协和医学院, 药物研究所, 药物传输技术及新型制剂北京市重点实验室, 北京 100050)])]), Author(id=1308817962396639842, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1308817962467943012, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, authorId=1308817962396639842, language=EN, stringName=Yu-jia ZHANG, firstName=Yu-jia, middleName=null, lastName=ZHANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2中国医学科学院北京协和医学院, 药物研究所, 药物传输技术及新型制剂北京市重点实验室, 北京 100050, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1308817961427755592, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, xref=2, ext=[AuthorCompanyExt(id=1308817961436144201, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, companyId=1308817961427755592, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2中国医学科学院北京协和医学院, 药物研究所, 药物传输技术及新型制剂北京市重点实验室, 北京 100050)])]), Author(id=1308817962593772135, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, orderNo=4, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1308817962665075305, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, authorId=1308817962593772135, language=EN, stringName=Guang-zhi SHAN, firstName=Guang-zhi, middleName=null, lastName=SHAN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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3Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1308817962765738602, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, authorId=1308817962593772135, language=CN, stringName=山广志, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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3中国医学科学院北京协和医学院, 医药生物技术研究所, 北京 100050, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1308817961524224587, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, xref=3, ext=[AuthorCompanyExt(id=1308817961536807500, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, companyId=1308817961524224587, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3中国医学科学院北京协和医学院, 医药生物技术研究所, 北京 100050)])]), Author(id=1308817962849624684, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, orderNo=5, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1308817962950287982, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, authorId=1308817962849624684, language=EN, stringName=Xu-dong WANG, firstName=Xu-dong, middleName=null, lastName=WANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
4, address=
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Active pharmaceutical ingredient (API) chemicals: a critical review of current biotechnological approaches [J]. Bioengineered, 2022, 13: 4309-4327., articleTitle=null, refAbstract=null), Reference(id=1308817966062461589, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=2, rfOrder=1, authorNames=null, journalName=null, refType=null, unstructuredReference=Szekely G, Amores de Sousa MC, Gil M, et al. Genotoxic impurities in pharmaceutical manufacturing: sources, regulations, and mitigation [J]. 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A systematic review of epinephrine degradation with exposure to excessive heat or cold [J]. Ann Allergy Asthma Immunol, 2016, 117: 79-87., articleTitle=null, refAbstract=null), Reference(id=1308817966494474907, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=8, rfOrder=7, authorNames=null, journalName=null, refType=null, unstructuredReference=Cok I, Emerce E. Overview of impurities in pharmaceuticals: toxicological aspects [J]. 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Rubus idaeus ′glen ample′ cultivar variety [J]. J Pharm Biomed Anal, 2016, 121: 99-106., articleTitle=null, refAbstract=null), Reference(id=1308817966653858461, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=10, rfOrder=9, authorNames=null, journalName=null, refType=null, unstructuredReference=Iguiniz M, Heinisch S. Two-dimensional liquid chromatography in pharmaceutical analysis. Instrumental aspects, trends and applications [J]. J Pharm Biomed Anal, 2017, 145: 482-503., articleTitle=null, refAbstract=null), Reference(id=1308817966733550238, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=11, rfOrder=10, authorNames=null, journalName=null, refType=null, unstructuredReference=Jiang YF, Zhao XJ, Shan GZ. Development and application of valve interface technology in two-dimensional liquid chromatography [J]. Chin J Anal Lab (分析试验室), 2023, 42: 1127-1136., articleTitle=null, refAbstract=null), Reference(id=1308817966800659103, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=12, rfOrder=11, authorNames=null, journalName=null, refType=null, unstructuredReference=Ye CX, Huang WJ, Qin SY, et al. Application progress of 2D-LC in analysis and quality control of traditional Chinese medicine [J]. Chem Reagents (化学试剂), 2022, 44: 1103-1110., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1308817961343869509, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, xref=1, ext=[AuthorCompanyExt(id=1308817961352258118, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, companyId=1308817961343869509, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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4武汉久安药物研究院有限公司, 湖北 武汉 100730)])], figs=[ArticleFig(id=1308817964636398212, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=EN, label=null, caption=null, figureFileSmall=z14gupKqlMo8Lg8cKt1wZw==, figureFileBig=urITdAVKIep/vRDRYXfY8Q==, tableContent=null), ArticleFig(id=1308817964703507077, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=CN, label=Fig.1, caption=
Structure of epinephrine, impurity H, and impurity M, figureFileSmall=z14gupKqlMo8Lg8cKt1wZw==, figureFileBig=urITdAVKIep/vRDRYXfY8Q==, tableContent=null), ArticleFig(id=1308817964804170374, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=EN, label=null, caption=null, figureFileSmall=Z9t/3mtWz+lABkhDGaLr/w==, figureFileBig=b1ItL2xxgnsIHw1tJNQM6g==, tableContent=null), ArticleFig(id=1308817964883862151, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=CN, label=Fig.2, caption=
Column switching 2DLC-MS analysis system diagram, figureFileSmall=Z9t/3mtWz+lABkhDGaLr/w==, figureFileBig=b1ItL2xxgnsIHw1tJNQM6g==, tableContent=null), ArticleFig(id=1308817964980331144, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=EN, label=null, caption=null, figureFileSmall=n1nWZWOk67rGlxHji4Avzw==, figureFileBig=hf697Eq5sbmuYWR3UiY5IQ==, tableContent=null), ArticleFig(id=1308817965122937481, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=CN, label=Fig.3, caption=
Chromatogram of impurity H. A: Retention time of high performance liquid chromatography (HPLC); B: One-dimensional HPLC; C: 2DHPLC. 1: Impurity H; 2: Impurity F; a: Test solution; b: Blank solution, figureFileSmall=n1nWZWOk67rGlxHji4Avzw==, figureFileBig=hf697Eq5sbmuYWR3UiY5IQ==, tableContent=null), ArticleFig(id=1308817965194240650, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=EN, label=null, caption=null, figureFileSmall=+ts62lUeaE7Z+rkY8jeVEw==, figureFileBig=/wtxgT03SF2t8PiRsqy4dg==, tableContent=null), ArticleFig(id=1308817965257155211, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=CN, label=Fig.4, caption=
Related pictures of impurity H. A: Ion chromatogram and mass spectrum under 2DLC-MS/MS (ESI+); B: Ion chromatogram and mass spectrum under 2DLC-MS/MS (ESI-); C: Possible fragmentation pathway in the mass spectrometry, figureFileSmall=+ts62lUeaE7Z+rkY8jeVEw==, figureFileBig=/wtxgT03SF2t8PiRsqy4dg==, tableContent=null), ArticleFig(id=1308817965320069772, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=EN, label=null, caption=null, figureFileSmall=kJXw7VaaiYBC/j73NAZA2Q==, figureFileBig=ZFcHQfi7N8oD5oiqny8i5g==, tableContent=null), ArticleFig(id=1308817965416538765, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=CN, label=Fig.5, caption=
Related pictures of impurity M. A: Retention time of HPLC chromatogram; B: Mass spectrum; C: Possible fragmentation pathway in the mass spectrometry; D: Hydrogen spectrum, figureFileSmall=kJXw7VaaiYBC/j73NAZA2Q==, figureFileBig=ZFcHQfi7N8oD5oiqny8i5g==, tableContent=null), ArticleFig(id=1308817965483647630, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=EN, label=null, caption=null, figureFileSmall=BPw7733guKXElPwMqlFC2Q==, figureFileBig=Yh3KNZQnsakBiAlmGcsC2g==, tableContent=null), ArticleFig(id=1308817965563339407, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=CN, label=Fig.6, caption=
HPLC chromatogram of impurities in epinephrine injection, figureFileSmall=BPw7733guKXElPwMqlFC2Q==, figureFileBig=Yh3KNZQnsakBiAlmGcsC2g==, tableContent=null), ArticleFig(id=1308817965626253968, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=EN, label=null, caption=null, figureFileSmall=HQiUXCjG29VwxJo3AwNQZw==, figureFileBig=gdBhDPBepClaOjYQ0cOW/w==, tableContent=null), ArticleFig(id=1308817965701751441, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=CN, label=Fig.7, caption=
The formation mechanism of impurities and the change trend of impurity content under different factors. A: The formation mechanism of impurity H; B: The influence of different factors on the content of impurity H (n = 2; Lot number: 20231211, 20231215, 20231217); C: The formation mechanism of impurity M; D: The influence of different factors on the content of impurity M (n = 2; Lot number: 20231211, 20231215, 20231217), figureFileSmall=HQiUXCjG29VwxJo3AwNQZw==, figureFileBig=gdBhDPBepClaOjYQ0cOW/w==, tableContent=null), ArticleFig(id=1308817965777248914, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| Known specific impurity | Structure | Source | Recorded in Pharmacopoeia |
| F |  | Reaction product of API and sodium pyrosulfite | Chinese Pharmacopoeia, British Pharmacopoeia, United States Pharmacopeia |
| B |  | By-products in the synthesis process of API | Chinese Pharmacopoeia, British Pharmacopoeia, United States Pharmacopeia |
| C |  | By-products in the synthesis process of API | Chinese Pharmacopoeia, British Pharmacopoeia, United States Pharmacopeia |
| D |  | Intermediates for the synthesis of API | British Pharmacopoeia, United States Pharmacopeia |
| E |  | The starting material for the synthesis of API | British Pharmacopoeia, United States Pharmacopeia |
), ArticleFig(id=1308817965848552083, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817688177238614, language=CN, label=Tab.1, caption=
Summary of specific impurities in epinephrine injection. API: Active pharmaceutical ingredient
, figureFileSmall=null, figureFileBig=null, tableContent=
| Known specific impurity | Structure | Source | Recorded in Pharmacopoeia |
| F |  | Reaction product of API and sodium pyrosulfite | Chinese Pharmacopoeia, British Pharmacopoeia, United States Pharmacopeia |
| B |  | By-products in the synthesis process of API | Chinese Pharmacopoeia, British Pharmacopoeia, United States Pharmacopeia |
| C |  | By-products in the synthesis process of API | Chinese Pharmacopoeia, British Pharmacopoeia, United States Pharmacopeia |
| D |  | Intermediates for the synthesis of API | British Pharmacopoeia, United States Pharmacopeia |
| E |  | The starting material for the synthesis of API | British Pharmacopoeia, United States Pharmacopeia |
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