关于二甲双胍和格列吡嗪及其复方制剂含量测定的研究

采用等吸收波长消去法联用直接紫外分光光度法测定二甲双胍格列吡嗪片的含量,操作简单,准确度高。


摘    要: 目的:建立等吸收波长消去法联用直接紫外分光光度法同时测定二甲双胍格列吡嗪片的含量。方法:测定药物的吸收光谱,确定测定方法和波长,并检验试验方法的准确度、精密度和耐用性。结果:二甲双胍在0.5~3.5g/L浓度范围内,A=0.17152C+0.00922,r=0.9995,线性良好,精密度RSD=0.32%,重复性良好;回收率99.6%,RSD=0.45%,准确度高,检测限0.0077g/L;格列吡嗪在5~35mg/L浓度范围内,A=0.01675C+0.00720,r=0.9999,线性良好,精密度RSD=0.34%,重复性好,回收率100.7%,RSD=0.38%,准确度高,检测限0mg/L;二甲双胍在90分钟内可以保持基本稳定,格列吡嗪在150分钟内可保持基本稳定。结论:该方法可快速测定复方制剂中二甲双胍和格列吡嗪两个组分,无需分离,且结果准确、操作简单,能用于二甲双胍格列吡嗪片的快速含量测定,为药物含量测定和药品质量控制提供了一种新方法。

Objective: To establish a method for simultaneous determination of metformin and glipizide tablets by direct ultraviolet spectrophotometry with isosmotic wavelength elimination method. Methods: Determination of absorption spectra of drugs, determination of measurement methods and wavelengths, and verification of test methods for accuracy, precision, and durability. Results: Metformin in the concentration range of 0.5-3.5g/L, A=0.17152C+0.00922, r=0.9995, good linearity, in precision RSD=0.32%, good repeatability; recovery rate 99.6%, RSD=0.45%, accuracy High, the detection limit was 0.0077g/L; glipizide was in the range of 5~35mg/L, A=0.01675C+0.00720, r=0.9999, good linearity, precision RSD=0.34%, good repeatability, recovery The rate is 100.7%, RSD = 0.38%, high accuracy, detection limit 0mg/L; metformin can remain basically stable within 90 minutes, glipizide can remain basically stable within 150 minutes. Conclusion: This method can quickly determine the two components of metformin and glipizide in compound preparations. It can be directly determined without isolation, and the results  are exact and simple to operate. It can be used for rapid determination of metformin and glipizide tablets. Provides a new method for drug content determination and drug quality control.

关键词:二甲双胍; 格列吡嗪; 紫外分光光度法;复合制剂;含量检测

Keyword: Metformin; Glipizide; UV spectrophotometry;Compound Preparation;Content detection

目    录

1 引言 1

1.1 糖尿病现状及病理机制 1

1.2 二甲双胍 1

1.3 格列吡嗪 2

1.4 二甲双胍格列吡嗪复方制剂 2

1.5 选题依据 3

1.5.1 吸收峰重叠 4

1.5.2 溶液条件影响 4

1.5.3 浓度不同 4

1.6 本课题实验思路 4

2 实验部分 6

2.1 仪器、试剂及药品 6

2.1.1 仪器 6

2.1.2 试剂与药品 6

2.2 方法 7

2.2.1 溶剂的选择 7

2.2.2 常用试剂的制备 7

2.2.3 测定波长的选择 8

2.2.4 标准曲线的建立 10

2.3 定量分析方法验证 12

2.3.1 精密度 12

2.3.2 准确度试验 13

2.3.3 耐用性试验 14

2.3.4 检测限 16

2.4 含量测定 17

3 结论 19

3.1 实验过程分析 19

3.2 实验结果分析 19

参考文献 20

致谢 21

1 引言

1.1 糖尿病现状及病理机制

随着人们生活质量的提高,糖尿病变得越来越常见,逐渐成为人们关注的焦点。糖尿病按胰岛β细胞是否破坏分为两种类型:Ⅰ型和Ⅱ型,而Ⅱ型糖尿病患者占糖尿病患者总量的大部分,约90 %,且发病率仍在上升中。

Ⅱ型糖尿病高发人群为中老年人,肥胖者发病率较高,其主要病理机制是胰岛素抵抗、胰岛素分泌相对不足或两者皆有并以其中之一为主。临床对Ⅱ型糖尿病的药物治疗的关键在于促使血糖达标,帮助胰岛素功能尽快回复,降低各种并发症的发生率。