International comparisons for coulometric determinations of dichromate used to develop certified reference material for oxidation-reduction titration

Journal of the Brazilian Chemical Society

Borges, Paulo P.¹  Silva Junior, Wiler B. da¹  National Institute of Metrology, Quality and Technology, Duque de Caxias, Brazil¹ 

关键词: certified reference material;    precise coulometric titration;    potassium dichromate;    comparability;   

DOI  :  10.5935/0103-5053.20140086

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

Initially, for acquiring experience in determining the purity of the dichromate by coulometry, a bilateral comparison between the national metrology institutes (NMIs) from Brazil and Russia was carried out. Next, to evaluate the comparability of the measurement results among the NMIs that use high-precison constant-current coulometry for certifying reference materials (RMs) of pure compounds, National Institute of Metrology, Quality and Technology (Inmetro) participated in a

【 授权许可】

Unknown