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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Inorganic compound

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

"Online Quality Control In Concentrated Hydrochloric Acid Production Plants. Flow Injection Determination Of Hydrochloric Acid Content In Concentrated Hydrochloric Acid By Automated Pre-valve Dilution And A Coated Tubular Solid-state Chloride-selective Ele"
Fresenius J. Anal. Chem. 1987 Volume 328, Issue 1-2 Pages 68-70
Jacobus F. van Staden

Abstract: Diluted samples (30 µL) are mixed with 1 M KNO3 as carrier solution for determination at a flow-through tubular indicator electrode, used in conjunction with an Orion 90-02 double-junction reference electrode with 10% KNO3 as outer chamber filling solution The sampling rate is 60 h-1. The construction, preparation and conditioning of the electrode are similar to a previously described procedure (Anal. Chim. Acta, 1986, 179, 407). The method is applied to samples containing 9 to 38% of HCl. Results for this method agree well with those obtained by using the Na2CO3 and Volhard titration procedures. The coefficient of variation for samples of different HCl content is <0.6% (n = 15).
Hydrochloric acid Electrode Electrode Potentiometry Method comparison