A simple colorimetric FIA method for the determination of pyrite oxidation rates

Owen Osborne; Allan Pring; Claire Lenehan

doi:10.1016/j.talanta.2010.07.086

A simple colorimetric FIA method for the determination of pyrite oxidation rates

Owen Osborne, Allan Pring, Claire Lenehan

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

A method for the rapid determination of the oxidation rate of naturally occurring pyrite (FeS₂) samples is presented. The progress of the oxidation reaction was followed by measurement of the concentration of total dissolved iron using flow injection analysis. Iron was determined using UV-vis detection after reaction with the colorimetric reagent 5-sulfosalicylic acid in the presence of ammonia. The calibration function was linear between 5 and 150 mg L^-1, and the detection limit was 0.46 mg L^-1. The relative standard deviation was typically less than 1% (n = 10) and the measurement frequency was 60/h. The method was used to quantify the oxidation rate of 10 ground and cleaned pyrite samples (53 μm < x < 106 μm) from various international locations that were subjected to accelerate oxidation in acidic hydrogen peroxide. Results of these experiments showed that there was almost an order of magnitude of difference in oxidation rates of the pyrite samples.

Original language	English
Pages (from-to)	1809-1813
Number of pages	5
Journal	Talanta
Volume	82
Issue number	5
DOIs	https://doi.org/10.1016/j.talanta.2010.07.086
Publication status	Published - 15 Oct 2010

Keywords

5-Sulfosalicylic acid
FIA
Flow analysis
Iron
Pyrite

Access to Document

10.1016/j.talanta.2010.07.086

Cite this

@article{22a418bced2e4767a312c2cbf27a4dc1,

title = "A simple colorimetric FIA method for the determination of pyrite oxidation rates",

abstract = "A method for the rapid determination of the oxidation rate of naturally occurring pyrite (FeS2) samples is presented. The progress of the oxidation reaction was followed by measurement of the concentration of total dissolved iron using flow injection analysis. Iron was determined using UV-vis detection after reaction with the colorimetric reagent 5-sulfosalicylic acid in the presence of ammonia. The calibration function was linear between 5 and 150 mg L-1, and the detection limit was 0.46 mg L-1. The relative standard deviation was typically less than 1% (n = 10) and the measurement frequency was 60/h. The method was used to quantify the oxidation rate of 10 ground and cleaned pyrite samples (53 μm < x < 106 μm) from various international locations that were subjected to accelerate oxidation in acidic hydrogen peroxide. Results of these experiments showed that there was almost an order of magnitude of difference in oxidation rates of the pyrite samples.",

keywords = "5-Sulfosalicylic acid, FIA, Flow analysis, Iron, Pyrite",

author = "Owen Osborne and Allan Pring and Claire Lenehan",

year = "2010",

month = oct,

day = "15",

doi = "10.1016/j.talanta.2010.07.086",

language = "English",

volume = "82",

pages = "1809--1813",

journal = "Talanta",

issn = "0039-9140",

publisher = "Elsevier",

number = "5",

}

TY - JOUR

T1 - A simple colorimetric FIA method for the determination of pyrite oxidation rates

AU - Osborne, Owen

AU - Pring, Allan

AU - Lenehan, Claire

PY - 2010/10/15

Y1 - 2010/10/15

N2 - A method for the rapid determination of the oxidation rate of naturally occurring pyrite (FeS2) samples is presented. The progress of the oxidation reaction was followed by measurement of the concentration of total dissolved iron using flow injection analysis. Iron was determined using UV-vis detection after reaction with the colorimetric reagent 5-sulfosalicylic acid in the presence of ammonia. The calibration function was linear between 5 and 150 mg L-1, and the detection limit was 0.46 mg L-1. The relative standard deviation was typically less than 1% (n = 10) and the measurement frequency was 60/h. The method was used to quantify the oxidation rate of 10 ground and cleaned pyrite samples (53 μm < x < 106 μm) from various international locations that were subjected to accelerate oxidation in acidic hydrogen peroxide. Results of these experiments showed that there was almost an order of magnitude of difference in oxidation rates of the pyrite samples.

AB - A method for the rapid determination of the oxidation rate of naturally occurring pyrite (FeS2) samples is presented. The progress of the oxidation reaction was followed by measurement of the concentration of total dissolved iron using flow injection analysis. Iron was determined using UV-vis detection after reaction with the colorimetric reagent 5-sulfosalicylic acid in the presence of ammonia. The calibration function was linear between 5 and 150 mg L-1, and the detection limit was 0.46 mg L-1. The relative standard deviation was typically less than 1% (n = 10) and the measurement frequency was 60/h. The method was used to quantify the oxidation rate of 10 ground and cleaned pyrite samples (53 μm < x < 106 μm) from various international locations that were subjected to accelerate oxidation in acidic hydrogen peroxide. Results of these experiments showed that there was almost an order of magnitude of difference in oxidation rates of the pyrite samples.

KW - 5-Sulfosalicylic acid

KW - FIA

KW - Flow analysis

KW - Iron

KW - Pyrite

UR - http://www.scopus.com/inward/record.url?scp=77957358581&partnerID=8YFLogxK

U2 - 10.1016/j.talanta.2010.07.086

DO - 10.1016/j.talanta.2010.07.086

M3 - Article

SN - 0039-9140

VL - 82

SP - 1809

EP - 1813

JO - Talanta

JF - Talanta

IS - 5

ER -

A simple colorimetric FIA method for the determination of pyrite oxidation rates

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this