University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Metal -> silicon

Citations 2

"Determination Of Trace Manganese In High-purity Titanium, Silicon And Mineral Acids By A Flow Injection Method Based On A Catalytic Reaction"
Anal. Chim. Acta 1989 Volume 217, Issue 1 Pages 23-30
Chongliang Zhang, Susumu Kawakubo and Tsutomu Fukasawa

Abstract: Sample solution (1 to 2 ml; 1.5 M in HF and 0.2 M in HCl) was subjected to ion-exchange extraction on a column of Amberlite CG-120 (H+ form, 100 to 200 mesh), with elution of the Mn with 6 M HCl. The eluate was evaporated almost to dryness, and the residue was dissolved in acetate buffer (pH 4.4). Portions (100 µL) were injected into the flow injection system where they were mixed with reagent solution [0.26 mM malachite green (C. I. Basic Green 4) - 0.01 M KIO4] before passing to a reaction coil at 50°C. The absorbance of the solution was measured at 615 nm. The calibration graph was rectilinear for up to 7 ng of Mn and the coefficient of variation (n = 5) at 3 ng of Mn was 2%. The method was successfully applied in the analysis of HF, HCl and HNO3 and of Ti metals and Si (sample prep. described).
Manganese Spectrophotometry Preconcentration Column Amberlite Buffer Catalysis Heated reaction

"Catalytic Determination Of Manganese By A Micro Ion Exchange Separation - Flow Injection Method"
Kenkyo Hokoku 1987 Volume 50, Issue 11 Pages 211-216
Zhang, C.L.;Kawakubo, S.;Fukasawa, T.;Iwatsuki, M.;Fukasawa, T.

Abstract: A combined ion-exchange separation and flow-injection anal. method was proposed for the determination of 0.2 to 7 ng of manganese, and applied to Mn determination in HF, HNO3, HCl, hydrochloric acids, Si, and Ti samples. A silicon or titanium sample was decomposed by the above acids, adjusted to be 1.5 M in HF and 0.2 M in HCl and followed by a cation-exchange separation using a microcolumn. The adsorbed manganese was eluted with 0.2 mL of 6 M HCl. Any acid samples described above and the eluate containing manganese were evapd. to dryness. The residue was dissolved and made to 300 µL (or more) of a 0.1 M acetate buffer solution (pH 4.4). A 100 µL aliquot was analyzed by the flow injection analysis based on the Malachite Green-periodate catalytic reaction. (SFS)
Manganese Ion exchange Catalysis