摘要
Shifris B.J.等用伏安法在0.5mol/LHCl(含0.1mmol/LHg^(2+))支持电解质中,进行了Cu-Ni精矿中Rh、Ir的连续测定,但灵敏度较低,只能测至1μmol/L。作者曾用HgCl_2-HCl-乙二胺体系测定Rh(Ⅲ),检出限为10ng。 本文进一步发现铑离子在H_2SO_4-HgCl_2介质中,具有稳定而尖锐的阳极溶出峰(见图1)。图中Rh(Ⅲ)
We used the cation exchange resin as enrichment to separate rhodium which has been successfully determined in the samples. A new and simple system of determinating Rh at a glass carbon electrode by anodic stripping voltammetry (ASV) was studied. The optimum supporting electrolytic system was 0.07mol.dm-3 H2SO4-HgCl2.Between quantitative orders of Rh3+from 10-10g/m Lto 10-7g/mL, the concentration on peak current is linear. The detection limit reached 0.1ng. The coefficient variation are 0.005 7% and 0.0058% respectively with samples of chloridized residue and refined mineral for 6 replicate determinations. Results obtained by this method quite agree with that of other methods. The industrial waste water and second nickel anode mud were also determined. Its coefficient variations were 0.0087% and 0.010% respectively.The recovery rate of chloridized residue was in the range of 93-106%.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1989年第2期194-196,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
贵金属
铑
阳极溶出
伏安法
Precious metal, Electrochemical analysis, Rhodium, Anodic stripping voltammetry
