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: Geological -> ore -> nickel

Citations 1

"Selective Determination Of Sulfuric Acid In Liquors From Acidic Nickel Ore Extraction By Flow Injection Analysis"
Anal. Chim. Acta 1996 Volume 328, Issue 1 Pages 61-65
Isel Cortés and Fernando Albertús*

Abstract: Sample (110 µL) was injected into a water carrier stream (2.6 ml/min) which then merged with a reagent stream (0.6 ml/min) containing 0.5 M Na2SO4 and 0.2 mM methyl orange. The flow passed through a mixing coil (60 cm x 0.5 mm i.d.) to the detector where the absorbance was measured at 520 nm. A non-linear calibration graph was obtained for up to 12.5 mM H2SO4. The RSD (n=10) was 2%. The sampling frequency was 120/h. The method was applied to three industrial process solutions; RSD (n = 3) were ≤8%. The results were confirmed by potentiometric titrimetry.
Sulfuric acid Spectrophotometry Potentiometry Method comparison