生物检定+活性分析

离子色谱法测定人血白蛋白制品中辛酸钠的含量*

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  • 1.上海市食品药品检验研究院 国家药监局治疗类单抗质量控制重点实验室,上海 201203;
    2.赛默飞世尔科技(中国)有限公司,上海 201203
第一作者 Tel:18001678925;E-mail:181519557@qq.cn
** Tel:(021)50798176;E-mail:shaohong@smda.sh.cn

收稿日期: 2023-05-30

  网络出版日期: 2024-06-21

基金资助

* 上海市研发公共服务平台项目(19DZ2294600)

Determination the content of sodium caprylate in human blood albumin products by ion chromatography*

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  • 1. Shanghai Institute for Food and Drug Control, NMPA Key Laboratory for Quality Control of Therapeutic Monoclonal Antibodies, Shanghai 201203, China;
    2. Thermo Fisher Scientific (China) Co., Ltd., Shanghai 201203,China

Received date: 2023-05-30

  Online published: 2024-06-21

摘要

目的:建立离子色谱法测定人血白蛋白制品中辛酸钠的含量。方法:样品加淋洗液[甲醇-乙腈-1.0 mmol·L-1盐酸(20:42:38)]沉淀蛋白,离心取上清液,过滤后直接进样,以庚酸为内标。采用Dionex InPacTM NS1分析柱(250 mm×4 mm,10 μm)与Dionex InPacTM NG1保护柱(35 mm×4 mm,10 μm),流速1.0 mL·min-1,ASRS 300 膜抑制器,化学抑制,再生液为 5 mmol·L-1四丁基氢氧化钠溶液,电导检测器检测,柱温 30 ℃,进样量 25 μL。结果:辛酸峰与内标峰间的分离度>1.5;辛酸钠在0.38~2.52 mmol·L-1范围内线性关系良好,r=0.999 5(n=6);重复性试验的RSD为1.1%(n=6);平均加样回收率为97.4%,RSD为1.8%(n=9);定量限与检测限分别为0.19 nmol与0.09 nmol;国内外7家企业20批人血白蛋白制品中辛酸钠含量范围为0.073~0.163 mmol·g-1结论:本研究建立的方法操作简便易行,结果准确,灵敏度高,重复性好,可用于人血白蛋白制品中辛酸钠含量的测定,为其质量控制提供方法保证。

本文引用格式

严翠霞, 史芳亮, 韩春霞, 方欣欣, 郑璐侠, 邵泓 . 离子色谱法测定人血白蛋白制品中辛酸钠的含量*[J]. 药物分析杂志, 2024 , 44(2) : 249 -255 . DOI: 10.16155/j.0254-1793.2024.02.07

Abstract

Objective: To establish an ion chromatography method for determination the content of sodium caprylate in human blood albumin products. Methods: The samples were precipitated with eluent, the suspension was centrifuged and filtered, the filtrate was injected to IC, and heptanoic acid was used as the internal standard. A Dionex InPacTM NS1 Analytical Column (250 mm×4mm, 10 μm) and a Dionex InPacTM NG1 Guard Column (35 mm×4 mm, 10 μm) were used,the flow rate was 1.0 mL· min-1. The conductivity detector and ASRS 300 membrane suppressor were used, and the regenerant solution was 5 mmol·L-1 tetrabutylsodium hydroxide solution;the column temperature was 30 ℃ and the injection volume was 25 μL. Results: The resolution between the peaks of sodium caprylate and the internal standard was greater than 1.5, and the linearity of concentration of sodium caprylate was good in the range of 0.38-2.52 mmol·L-1, r=0.999 5 (n=6). The RSD of the repeatability test was 1.1% (n=6). The average recovery was 97.4% and RSD was 1.8% (n=9). The limits of quantification and detection were 0.19 nmol and 0.09 nmol, respectively. The determination results of the content of sodium octanoate in 20 batches of human blood albumin samples from 7 enterprises at home and abroad ranged from 0.073-0.163 mmol·g-1. Conclusion: The method established in this study is simple to operate, accurate in results, high in sensitivity and good in repeatability, can be used for the determination of sodium caprylate content in human blood albumin products and provide a method guarantee for its quality control.

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