GC-MS法测定不同级别硬脂酸中乙醇的含量张悦1,2,赵勇1,2*,郑金凤1,2,刘雁鸣1,2,谢莹莹1,2(1.湖南省药品检验检测研究院,湖南长沙410001;2.国家药品监督管理局药用辅料工程技术研究重点实验室,湖南长沙410001)摘要:目的建立气相色谱-串联质谱法(GC-MS)法测定硬脂酸中乙醇含量的方法,为硬脂酸质量控制提供依据。方法采用AgilentDB-624毛细管柱程序升温进行分离;电子轰击离子源(EI),单离子检测扫描(SIM)模式扫描,选择乙醇:定量离子为31.0,定性离子为31.0、46.2;丙酮(内标):定量离子为43.0,定性离子为43.0、58.2,进行检测,内标法计算含量。结果在该实验条件下,乙醇在0.1~20.2μg·mL-1的浓度范围线性关系良好(r=0.9996),检出限为11.4ng·mL-1,平均回收率为104.78%,RSD为2.67%。结论该方法灵敏度高、重现性较好,可用于硬脂酸中乙醇的测定。关键词:硬脂酸;乙醇;气相色谱-串联质谱法中图分类号:R927文献标识码:A文章编号:1006-3765(2023)-02-0051-03作者简介:张悦,女。职称:主管药师,实验员。主要从事药用辅料检验检测。通讯作者:赵勇,男。职称:副主任药师。主要从事中药和药用辅料研究。DeterminationofEthanolinDifferentGradesofStearicAcidbyGC-MSZHANGYue1,2,ZHAOYong1,2*,ZHENGJin-feng1,2,LIUYan-ming1,2,XIEYing-ying1,2(1.HunanInstituteforDrugControl,Changsha410001,China;2.NMPAKeyLaboratoryforPharmaceuticalExcipientsEngi-neeringTechnologyResearch,Changsha410001,China)ABSTRACT:OBJECTIVEAmethodforthedeterminationofethanolinstearicacidbyGC-MSwasestablishedtoprovideabasisforthequalitycontrolofstearicacid.METHODSTheAgilentDB-624capillarycolumnwasusedforseparationbyprogrammedtemperature,andthequantitativeion(m/z)31.0andthequalitativeion31.0and46.2wereselectedfordetection.Acetoneastheinternalstandardwasused,andthequantitativeion(m/z)43.0andthequalitativeion43.0and58.2wereselectedfordetection.Thedetectorwaselectronbombardmentionsource(EI),Modescanwassingleiondetectionscan(SIM).RESULTSUnderthechromatographiccondition,ethanolcanbecompletelyseparated;thelinearrelationshipofethanolwithintheconcentrationrangeof0.1~20.2μg·mL-1wasgood(r=0.9996),thedetectionlimitwas11.4ng·mL-1andtheaveragerecoverywas104.78%(RSD=2.6...