001中二氯乙醇残留检测报告

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替硝唑中二氯乙醇残留测定报告Report for Determination of Residual 2-Chloroethanol Oxide inTinidazole实施部门:注册部QR组负责人:聂娟报告日期:2010年11月15日方案信息审核:目录List1. 目的(PURPOSE) (3)2. 范围(SCOPE) (3)3. 职责(RESPONSIBILITY) (3)4. 内容(CONTENT) (3)4.1.基本信息(B ASIC INFORMATION) (3)4.2.分析方法(A NALYTICAL M ETHOD) (5)4.3.方法验证(M ETHOD VALIDATION) (6)4.3.1.可接受标准(A CCEPTANCE CRITERIA) (6)4.3.2. 专属性(Specificity) (6)4.3.3. 检测限与定量限(LOD&LOQ) (7)4.4.样品测定(S AMPLE D ETERMINATION) (8)4.5.结论(C ONCLUSION) (9)1. 目的(Purpose)检测合成起始物料二氯乙醇在替硝唑成品中的存在情况,确定是否需要在替硝唑质量标准中包括二氯乙醇的控制项目。

1. PurposeThe GC method is developed for the qualitative test of the starting material 2-Chloroethanol Oxide which is considered as a genotoxic substance. Which help us to determine whether it’s necessary to include the control of 2-Chloroethanol in the specification of Tinidazole.2. 范围(Scope)适用于替硝唑中二氯乙醇的测定。

2. ScopeApply to test of the 2-Chloroethanol in Tinidazole3. 职责(Responsibility)QR: 负责实验的实施及检测结果的报告。

QA:负责报告的审核及批准。

3. ResponsibilityQR: Responsible for the experiment implementation and report writing.QA: Responsible for the report audited and approved.4. 内容(Content)4.1. 基本信息(Basic information)4.1.1. 概述根据欧洲药品管理局(EMEA)基因毒性杂质限度指南(G UIDELINE O N T HE L IMITS O F G ENOTOXIC I MPURITIES)(EMEA/CHMP/QWP/251344/2006),应对药品中潜在基因毒性杂质进行控制。

基于结构警告(structural alerts),替硝唑合成起始物料二氯乙醇含有潜在致癌性和/或基因毒性的基团:根据该指南,在缺少相关毒理学资料时,这些潜在基因毒性杂质的限度可按下式计算:限度(ppm) =MDD[g/天]其中TTC(Threshold of Toxicological Concern)为需要毒理学试验的阈值,为1.5μg/天;MDD(Maximal Daily Dose)为最大日剂量,替硝唑为2.0g/天。

因此限度为0.75ppm。

4. Content4.1 Basic information4.1.1 SummarizeAccording to the guideline on the limits of genotoxic impurities (EMEA/CHMP/ QWPQWP/251344/2006 ),the potential genotoxic substance in drug should be controlled. For theAccording to the guildline, the limitation of the genotoxic substance can be calculated by the following formula when less of the related material of toxicology.Limitation (ppm) = TTC[μg/day] MDD[g/day]In which TTC is the Threshold of toxicological Concem (1.5μg/day); MDD is the maximal daily dose, the MDD for Tinidazole is 2.0g/day. So the limitation of 2-Chloroethanol is 0.75ppm.4.2.分析方法(Analytical Method)供试品溶液:称取替硝唑供试品3.0000g至10mL烧杯中,再精密加入二氯甲烷5mL,超声5分钟,过滤,取滤液。

(0.600g/ml)对照品溶液:精密称取二氯乙醇20.00mg至含有二氯甲烷5ml的25ml容量瓶中,用二氯甲烷稀释至刻度,摇匀。

精密量取1.0ml至100ml容量瓶中,用二氯甲烷稀释至刻度,摇匀。

再精密量取1.125ml至20ml容量瓶中,用二氯甲烷稀释至刻度,摇匀。

(0.45μg/ml)色谱系统:检测器:氢火焰离子化检测器(FID)色谱柱:DB-624(30m×0.530mm×3.00μm)柱温:在50℃保持5分钟,然后以10℃/分钟的速率升至100℃,保持5分钟后运行:在240℃保持5分钟,载气:氮气流速:35cm/s进样口温度:140℃检测器温度:260℃分流比:1:1测定法:分别取对照品溶液及供试品溶液进样,记录色谱图。

供试溶液进样记录的色谱图中不得出现与对照品溶液进样记录的色谱图中二氯乙醇对应的色谱峰。

4.2. Method descriptionT est solution:Transfer 3.0000g of Tinidazole to a 10-ml beaker, add 5.0ml of Dichloromethane and sonicate in an ultrasonic bath for 5min and filter, use the filtrate as the test solution.(0.600g/ml)Reference solution: Transfer 20.0mg of 2-Chloroethanol to a 25-ml volumetric flask containing 5ml of Dichloromethane and dilute to25.0ml with the same solvent. Dilute 1.0ml of this solution to 100.0ml with Dichloromethane, Dilute 1.125ml of this solution to 20.0 ml with Dichloromethane and mix well. (0.45μg/m l)GC condition:Detector: FIDColumn: DB-624 (30m×0.53mm×3.00μm)Column temperature: Maintain for 5 min at 50°C, at the rate of10°C/min to 100°C, maintain for 5min at 100°CPostrun: Maintain for 5 min at 240°CCarrier gas: Nitrogen for chromatography RFlow rate: 35cm/sInjection port temperature: 140°CDetector temperature: 260°CSplit ratio: 1:1Test procedure: Inject the reference solution and test solution respectively and record the chromatogram. In the chromatogram obtained with the test solution: there should be not any peak corresponds to that of 2-Chloroethanol oxide in the chromatogram obtained with reference solution.4.3. 方法验证(Method validation)4.3 Method validation4.3.2. 专属性(Specificity)4.3.2.1简述专属性由相邻色谱峰之间的分离度来说明,二氯乙醇与相邻色谱峰的分离度不得低于2.0。

4.3.2.2 溶液配制空白溶液:二氯甲烷。

样品溶液:称取替硝唑供试品3.0013g至25mL烧杯中,再精密加入二氯甲烷5mL,超声5分钟,过滤,取滤液。

(0.60026g/ml)二氯乙醇储备溶液:精密称取二氯乙醇20.57mg至含有二氯甲烷5ml的25ml容量瓶中,用二氯甲烷稀释至刻度,摇匀。

精密量取1mL至100ml容量瓶中,用二氯甲烷稀释至刻度,摇匀。

(8.228μg/m L)二氯乙醇对照溶液:精密量取二氯乙醇储备溶液1.125ml至20ml容量瓶中,用二氯甲烷稀释至刻度,摇匀。

(0.4628μg/m L)分离度测试溶液:称取替硝唑3.0015g至25mL烧杯中,再精密加入上述二氯乙醇对照溶液5ml,超声5分钟,过滤,取滤液。

(塞克硝:0.6003μg/ml;二氯乙醇:0.4628μg/ml)结论:在该色谱条件下,二氯乙醇与相邻色谱峰完全分离,分离度大于2.0。

4.3.3. 检测限与定量限(LOD&LOQ)4.3.3.1简述检测限是指被测物能被检测出的最低量;定量限是指被测物能被定量测定的最低量。

检测限和定量限可用信噪比法测定。

信噪比约为3:1时的浓度为检测限;信噪约比为10:1时的浓度为定量限。

信噪比可按下式计算:S/N = H h其中:H目标组分的峰高;h为空白运行记录的色谱图中测得的的背景噪音。