SELECTIVE DETERMINATION OF SULFURIC-ACID IN LIQUORS FROM ACIDIC NICKEL ORE EXTRACTION BY FLOW-INJECTION ANALYSIS

Authors
CORTES I ALBERTUS F
Citation
I. Cortes et F. Albertus, SELECTIVE DETERMINATION OF SULFURIC-ACID IN LIQUORS FROM ACIDIC NICKEL ORE EXTRACTION BY FLOW-INJECTION ANALYSIS, Analytica chimica acta, 328(1), 1996, pp. 61-65
Citations number
7
Categorie Soggetti
Chemistry Analytical
Journal title
Analytica chimica acta → ACNP
ISSN journal
00032670
Volume
328
Issue
1
Year of publication
1996
Pages
61 - 65
Database
ISI
SICI code
0003-2670(1996)328:1<61:SDOSIL>2.0.ZU;2-L
Abstract
A two channel flow injection analysis (FIA) system for selective deter mination of sulfuric acid in liquors from acidic nickel ore extraction has been developed. Absorbance at 520 nm is increased due to changes in the reagent system (sodium sulfate/methyl orange) caused by reactio n with H2SO4 injected. Data processing was performed by non-linear reg ression. The results obtained by the proposed method are compared with those obtained by traditional potentiometric titrations, The setup al lows a sampling rate of 120 samples per hour. The relative standard de viation (RSD) obtained was less than or equal to 8%.