A simplified procedure for the determination of stable chlorine isotope ratios (δ37Cl) using LA-MC-ICP-MS

Fietzke, Jan; Frische, Matthias; Hansteen, Thor H.; Eisenhauer, Anton

doi:10.1039/b718597a

Cited by 43 publications

(56 citation statements)

References 7 publications

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“…The relatively small overall scatter of 37 Cl/ 35 Cl ratios for all analyses (Spearman's rho = 0.969 for 197 analyses), and the presence of the same types of minerals in both populations (high and low Cl) implies that the ablated mineral species is not responsible for the observed differences in Cl counts. Argon was used as a carrier gas and it stands to reason that the elevated counts for 37 Cl can be attributed to 36 ArH + (Fietzke et al 2008), although in our analyses, this was not quantified. Taking this into consideration, the consistent results obtained point to small, but significant, differences in 37 Cl/ 35 Cl , Cl/Br, and Cl/I ratios between the populations.…”

Section: Halidesmentioning

confidence: 97%

Geochemical identification of episodes of gold mineralisation in the Barberton Greenstone Belt, South Africa

Altigani

Merkle

Dixon

2016

Ore Geology Reviews

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The morphology and mineral chemistry of gold and associated sulphides at Sheba, Fairview, and New Consort gold mines in the Barberton Greenstone Belt (BGB) identify two main types of mineralization. The first type occurs associated with sulphides (mainly pyrite), either as inclusions (10-30 µm) or as sub-microscopic gold. The second gold type consists of large gold grains (≥ 100µm) within the silicates (mostly quartz).LA-ICP-MS studies reveal that some gold and associated sulphide grains contain high values of Cl, Br, Na, and I.The elemental relationships reflect the different chemistry and precipitation processes of possible source fluids, and identify several episodes of mineralisation in the study area, one of them formed due to a boiling process in a supercritical hydrothermal environment. This paper reports on the compositional characteristics of these gold grains, the significance of the halogen contents, and the implications for possible sources of the gold and associated sulphides.

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Section: Halidesmentioning

confidence: 97%

Geochemical identification of episodes of gold mineralisation in the Barberton Greenstone Belt, South Africa

Altigani

Merkle

Dixon

2016

Ore Geology Reviews

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“…25,26 In the case of boron isotopes the slope of the linear fit of 11 B plotted against 10 B intensities is used, covering the whole simultaneous signal development for both isotopes from baseline to maximum intensities. The merits of this method when compared to a conventional baseline reduction were already explained in detail in the references mentioned above.…”

Section: Instrumentation Data Acquisition and Evaluationmentioning

confidence: 99%

Boron isotope ratio determination in carbonates via LA-MC-ICP-MS using soda-lime glass standards as reference material

Fietzke

Heinemann

Taubner

et al. 2010

J. Anal. At. Spectrom.

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“…Pyrohydrolysis is a simple alternative for decomposition of organic 7,19,31,33 and inorganic [34][35][36] materials when halogens determination is intended. The main advantages are the possibility of matrix separation and the use of a diluted alkaline solution for analytes absorbing.…”

Section: Introductionmentioning

confidence: 99%

Determination of bromine, fluorine and iodine in mineral supplements using pyrohydrolysis for sample preparation

Taflik

Duarte

Flores

et al. 2012

J. Braz. Chem. Soc.

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Neste trabalho foi utilizada a piroidrólise para a decomposição de suplemento mineral utilizado na nutrição animal, para a posterior determinação de F, Br e I. Flúor foi determinado por potenciometria utilizando eletrodo íon-seletivo para fluoreto, enquanto que Br e I foram determinados por espectrometria de massa com plasma indutivamente acoplado. Os principais parâmetros que influenciam a piroidrólise foram investigados e, após a devida avaliação dos mesmos, foram fixadas as seguintes condições: a temperatura do reator em 1000 °C durante 10 min; a proporção entre a massa de amostra e a massa de acelerador em 1 + 5 e a vazão do gás carreador em 200 mL min -1 . A exatidão do método foi avaliada usando teste de recuperação do analito e análise de materiais de referência certificados de rocha fosfática e de solo. O método foi aplicado para análise de suplemento mineral. Os limites de quantificação foram de 16, 0,3 e 0,07 µg g -1 para F, Br e I, respectivamente. Assim, usando-se um método relativamente simples e de baixo custo é possível a decomposição de até 5 amostras por hora. Portanto, a piroidrólise pode ser usada como um método de rotina para o preparo de amostra de suplemento mineral para a determinação de F, Br e I.Pyrohydrolysis was employed for mineral supplements decomposition prior to F, Br and I determination. Fluoride determination was carried out by potentiometry using a fluoride-ion selective electrode, whereas Br and I were determined by inductively coupled plasma mass spectrometry. The main parameters that influence on pyrohydrolysis were investigated. After evaluation, the following conditions were established: reactor temperature of 1000 °C during 10 min; sample plus accelerator mass ratio of 1 + 5 and carrier gas (air) flow rate of 200 mL min -1 . The accuracy of the proposed method was evaluated by analyte recovery tests and analysis of certified reference materials of phosphate rock and soil. Commercial mineral supplement samples were analyzed. The limits of quantification were 16, 0.3 and 0.07 µg g -1 for F, Br and I, respectively. By using a relatively simple and low cost pyrohydrolysis system up to 5 samples can be processed per hour. The developed sample preparation procedure can be routinely employed for F, Br and I determination in mineral supplements. Keywords: pyrohydrolysis, halogens determination, mineral supplement IntroductionSeveral elements are essential for animals growing and breeding. Those elements required in high amounts are called macronutrients (Ca, Cl, K, P, Mg, Na, and S) and those elements required in low concentrations are called micronutrients (Co, Cu, Fe, I, Mn, Mo, Se, Zn, and eventually Cr and F are included in this group). 1 The main functions of essential elements in the organism are associated to the structural composition of body and enzymatic and hormonal processes.Although F usually increases the strength of bones and teeth, this element is generally not considered as essential. 1 Fluorine is usually present as a contaminant since it is Taflik et al. 489 ...

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A simplified procedure for the determination of stable chlorine isotope ratios (δ37Cl) using LA-MC-ICP-MS

Cited by 43 publications

References 7 publications

Geochemical identification of episodes of gold mineralisation in the Barberton Greenstone Belt, South Africa

Geochemical identification of episodes of gold mineralisation in the Barberton Greenstone Belt, South Africa

Boron isotope ratio determination in carbonates via LA-MC-ICP-MS using soda-lime glass standards as reference material

Determination of bromine, fluorine and iodine in mineral supplements using pyrohydrolysis for sample preparation

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