Indirect Determination of Cimetidine by UV-Vis Spectrophotometry
摘 要
建立了紫外-可见分光光度法间接测定西咪替丁含量的方法。在西咪替丁样品溶液中加入Cu2+溶液,用0.1 mol·L-1氢氧化钠溶液和0.1 mol·L-1盐酸溶液调节溶液至pH 7,并用pH 7的乙酸-乙酸钠缓冲液维持溶液酸度,西咪替丁与Cu2+形成稳定的Cu2+-西咪替丁配合物,该配合物在325 nm处产生明显的特征紫外吸收峰,通过测定其吸光度来间接测定西咪替丁的含量。结果显示:西咪替丁的质量浓度在一定范围内与其对应的Cu2+-西咪替丁配合物体系的吸光度呈线性关系,检出限(3s/k)为3.00 mg·L-1。对实际样品进行3个浓度水平的加标回收试验,西咪替丁的回收率为95.3%~102%,测定值的相对标准偏差(n=5)为1.2%~2.9%。
Abstract
A method for the indirect determination of cimetidine by UV-Vis spectrophotometry was established. Cu2+ solution was added to cimetidine sample solution, then the solution was adjusted to pH 7 with 0.1 mol·L-1 sodium hydroxide solution and 0.1 mol·L-1 hydrochloric acid solution, and kept the acidity with acetic acid-sodium acetate buffer solution (pH 7), and stable Cu2+-cimetidine complex was formed with an obvious characteristic absorption peak at 325 nm. The content of cimetidine was determined indirectly by measuring absorbance of the complex. Linear relationship between mass concentration of cimetidine and the absorbance of Cu2+-cimetidine complex system was kept in a definite range, with detection limit (3s/k) of 3.00 mg·L-1. Recovery test was made on the actual samples by standard addition method at 3 concentration levels, giving recovery in the range of 95.3%-102%, and RSDs of the determined values (n=5) were ranged from 1.2% to 2.9%.
中图分类号 O657.32 DOI 10.11973/lhjy-hx202108011
所属栏目 工作简报
基金项目 国家自然科学基金资助项目(82060713);广西自然科学基金项目(2017GXNSFAA198368);中药学广西一流学科(桂教科研[2018]12号);广西科技基地和人才专项(桂科AD20238058);广西壮瑶药重点实验室子项目(GXZYKF2019-7)
收稿日期 2021/1/31
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联系人作者丘琴(39446404@qq.com)
备注林瑜,讲师,主要从事基于光谱技术的药物理化检测分析工作
引用该论文: LIN Yu,QIU Qin,HE Yanhong. Indirect Determination of Cimetidine by UV-Vis Spectrophotometry[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2021, 57(8): 732~736
林瑜,丘琴,何艳虹. 紫外-可见分光光度法间接测定西咪替丁的含量[J]. 理化检验-化学分册, 2021, 57(8): 732~736
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【4】方应国,李成平,严小平,等.西咪替丁片剂含量的高效液相色谱法测定[J].药物分析杂志, 2010,30(3):465-467.
【5】赵超群,李樱红,罗金文.超高效液相色谱-串联质谱测定保健食品中添加的10种化学药物[J].药物分析杂志, 2014,34(9):1627-1633.
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【9】梁冰,冯宇艳,宋航,等.紫外-可见漫反射光谱-支持向量回归法快速测定西咪替丁片剂含量[J].四川大学学报(工程科学版), 2014,46(3):182-186.
【10】张洁,张越诚,李承佳,等.基于FRET效应的碳量子点/银纳米粒子荧光探针测定西咪替丁的研究[J].分析测试学报, 2020,39(7):894-899.
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