Original Article
Modificaton of pharmacopoeia method for quantitative detection of O-acetyl group content in typhoid Vi polysaccharide vaccine and its validation
Li Zhanhui, Ma Yuqian, He Yali, Chen Guoming, Liu Jing, Yan Chun
Published 2017-02-10
Cite as Int J Biologicals, 2017,40(1): 13-17. DOI: 10.3760/cma.j.issn.1673-4211.2017.01.004
Abstract
ObjectiveTo modify pharmacopoeia method (O-acetyl group assay) for quantitative detection of O-acetyl group content in typhoid Vi polysaccharide vaccine using low concentration control, and validate the feasibility of the modified method.
MethodsThe standard curve of the modified method was established using control solution containing 0.05, 0.10, 0.20, 0.30, 0.40, 0.50 μmol of acetylcholine bromide, and the standard curve linearity, accuracy, precision, specificity and durability of the modified method were validated.
ResultsThe standard curve linearity was good, with coefficient of determination ﹥0.998. The accuracy, precision and specificity were all good, the recoveries of O-acetyl group were 99.8%-101.3%, the relative standard deviations of intra- and inter-assay were both ﹤4%, and the recoveries of added O-acetyl group were all ﹥96%. The limit of quantitation of O-acetyl group was 0.070 mmol/L.
ConclusionThe modified method using low concentration control can be used for quantitative detection of O-acetyl group content in typhoid Vi polysaccharide vaccine.
Key words:
Spectrophotometry, ultraviolet; Bacterial vaccines; O-acetyl group
Contributor Information
Li Zhanhui
Quality Inspection Department, Beijing Tiantan Biological Products Co., Ltd., Beijing 100176, China
Ma Yuqian
He Yali
Chen Guoming
Liu Jing
Yan Chun