title: A stability study of an opacity standard.
abstract: Three procedures were adopted to increase the stability of the Chinese National Opacity Standard so that the change in opacity was within a range of +/- 5%.
authors.affiliation: National Institute for the Control of Pharmaceutical and Biological Products, Ministry of Health, Temple of Heaven, Bejing, China.
authors.forename: X B
authors.initials: XB
authors.lastname: Yi
authors.forename: H L
authors.initials: HL
authors.lastname: Xu
authors.forename: L Y
authors.initials: LY
authors.lastname: Qiao
authors.forename: P
authors.initials: P
authors.lastname: Xue
mesh_terms: D001428:Bacterial Vaccines / Q000592:standards*; D002681:China; D005898:Glass / Q000592:standards*; D008027:Light; D009391:Nephelometry and Turbidimetry; D012015:Reference Standards; D012542:Scattering, Radiation; D013057:Spectrum Analysis; D013535:Suspensions
chemical_list: D001428:Bacterial Vaccines; D013535:Suspensions