MULTIELEMENTAL ANALYSIS OF TANTALUM ORES BY ICP-OES

a 2022

MULTIELEMENTAL ANALYSIS OF TANTALUM ORES BY ICP-OES

ŠIMONÍKOVÁ, Lucie; Jan LOUN; Karel NOVOTNÝ a Viktor KANICKÝ

Základní údaje

Originální název

MULTIELEMENTAL ANALYSIS OF TANTALUM ORES BY ICP-OES

Autoři

ŠIMONÍKOVÁ, Lucie; Jan LOUN; Karel NOVOTNÝ a Viktor KANICKÝ

Vydání

2022

Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Obor

10406 Analytical chemistry

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/22:00127537

Organizační jednotka

Přírodovědecká fakulta

ISBN

978-80-88195-41-2

Klíčová slova česky

ICP-OES; tantalová ruda; rozklad

Klíčová slova anglicky

ICP-OES; tantalum ore; decomposition

Příznaky

Mezinárodní význam

Změněno: 20. 12. 2022 15:26, Mgr. Lucie Šimoníková

Anotace

V originále

The main goal of this work is to design an analytical procedure for determining the content of tantalum and niobium in ore concentrates with variable content of these elements. In nature, tantalum deposits rarely have a concentration of more than 0.05 wt. % Ta2O5 (usually 0.01 - 0.04 wt.%). Primary Ta (and Nb) mineralization is mainly related to igneous rocks, socalled rare element pegmatites. Moreover, depending on the nature of the deposit the ore may contain a wide range of accompanying minerals. For the evaluation of ore from an economic point of view, the tantalum oxide content determination is the most important. Nevertheless, knowledge of the concentrations of accompanying elements, such as tin, silicon, uranium, thorium, titanium, manganese, sulfur, sodium, potassium, is crucial for choosing the technological procedure of further processing. The following types of decompositions have been previously developed and can be found in the available literature: 1) microwave decomposition in various mineral acids; 2) alkaline melting; 3) decomposition with HF; 4) melting with Na2O2. Nevertheless, some of these decomposition methods do not reliably achieve 100% recovery, are time-consuming, the used chemicals contain also the elements of interest or there is an increased risk of contamination. Melting with lithium borax and subsequent dissolution in a mixture of acids has been found as an optimal method for tantalum ores sample preparation with variable content of the abovementioned elements. Depending on the origin and type of the ore the contents of Ta, Nb, Sn, Si, Ti, Mn, S, Na, K and other elements were determined by ICP-OES. The optimization of the decomposition method was verified using the standard X1808 or by the samples analyzed in an accredited laboratory by the XRF method. Verification of the results by the sum to 100% was also applied.

Citovat

ŠIMONÍKOVÁ, Lucie; Jan LOUN; Karel NOVOTNÝ a Viktor KANICKÝ. MULTIELEMENTAL ANALYSIS OF TANTALUM ORES BY ICP-OES. 2022. ISBN 978-80-88195-41-2.

@proceedings{2241066,
   author = {Šimoníková, Lucie and Loun, Jan and Novotný, Karel and Kanický, Viktor},
   keywords = {ICP-OES; tantalum ore; decomposition},
   language = {eng},
   isbn = {978-80-88195-41-2},
   title = {MULTIELEMENTAL ANALYSIS OF TANTALUM ORES BY ICP-OES},
   url = {http://esas-cssc2022.spektroskopie.cz/files/ESAS%202022%20BOOK%20OF%20ABSTRACTS.pdf},
   year = {2022}
}

TY  - CONF
ID  - 2241066
AU  - Šimoníková, Lucie - Loun, Jan - Novotný, Karel - Kanický, Viktor
PY  - 2022
TI  - MULTIELEMENTAL ANALYSIS OF TANTALUM ORES BY ICP-OES
SN  - 9788088195412
KW  - ICP-OES
KW  - tantalum ore
KW  - decomposition
UR  - http://esas-cssc2022.spektroskopie.cz/files/ESAS%202022%20BOOK%20OF%20ABSTRACTS.pdf
N2  - The main goal of this work is to design an analytical procedure for determining the content of tantalum and niobium in ore concentrates with variable content of these elements. In nature, tantalum deposits rarely have a concentration of more than 0.05 wt. % Ta2O5 (usually 0.01 - 0.04 wt.%). Primary Ta (and Nb) mineralization is mainly related to igneous rocks, socalled rare element pegmatites. Moreover, depending on the nature of the deposit the ore may contain a wide range of accompanying minerals. For the evaluation of ore from an economic point of view, the tantalum oxide content determination is the most important. Nevertheless, knowledge of the concentrations of accompanying elements, such as tin, silicon, uranium, thorium, titanium, manganese, sulfur, sodium, potassium, is crucial for choosing the technological procedure of further processing. The following types of decompositions have been previously developed and can be found in the available literature: 1) microwave decomposition in various mineral acids; 2) alkaline melting; 3) decomposition with HF; 4) melting with Na2O2. Nevertheless, some of these decomposition methods do not reliably achieve 100% recovery, are time-consuming, the used chemicals contain also the elements of interest or there is an increased risk of contamination. Melting with lithium borax and subsequent dissolution in a mixture of acids has been found as an optimal method for tantalum ores sample preparation with variable content of the abovementioned elements. Depending on the origin and type of the ore the contents of Ta, Nb, Sn, Si, Ti, Mn, S, Na, K and other elements were determined by ICP-OES. The optimization of the decomposition method was verified using the standard X1808 or by the samples analyzed in an accredited laboratory by the XRF method. Verification of the results by the sum to 100% was also applied.
ER  -

ŠIMONÍKOVÁ, Lucie; Jan LOUN; Karel NOVOTNÝ a Viktor KANICKÝ. \textit{MULTIELEMENTAL ANALYSIS OF TANTALUM ORES BY ICP-OES}. 2022. ISBN~978-80-88195-41-2.

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