- P-ISSN 1225-0163
- E-ISSN 2288-8985
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- P-ISSN1225-0163
- E-ISSN2288-8985
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Determination of Rare Earth Elements by Inductively Coupled Plasma Mass Spectrometry with Introduction of Organic Phase Using Ultrasonic Nebulizer
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2002, v.15 no.2, pp.127-134
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(2002). Determination of Rare Earth Elements by Inductively Coupled Plasma Mass Spectrometry with Introduction of Organic Phase Using Ultrasonic Nebulizer. Analytical Science and Technology, 15(2), 127-134.
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Abstract
Analytical method to determine rare earth elements which were extracted to organic phase by inductively coupled plasma mass spectrometry(ICP-MS) was investigated. Organic phase which had extracted rare earth elements was directly aspirated into ICP-MS by ultrasonic nebulizer(USN) in order to reduce solvent load to the plasma. Then, the count rate increased when MIBK(methyl isobutyl ketone) was added to EtOH(ethanol) but decreased when 0.03 M HEH(2-ethylhexyl-2-ethylhexyl phosphonic acid, <TEX>$P_{507}$</TEX>, PC88A) was added to solvent which mixed MIBK with EtOH. The optimal temperatures of desolvation system were -10 <TEX>$^{\circ}C$</TEX> for the condenser and 150 <TEX>$^{\circ}C$</TEX> for the heating tube. The optimal nebulizer flow rate which gave maximum count rate and minimum reflect power was 0.7 L/min. The optimal pH and extraction time were 4.3 and 10 min for MIBK-0.03 M HEH system. Detection limits which were obtained through calibration curves at the range of 0.2 <TEX>${\sim}$</TEX> 20 ng/mL were 0.02 <TEX>${\sim}$</TEX> 0.05 ng/mL under the optimal experimental conditions.
- keywords
- rare earth elements, ICP-MS, ultrasonic nebulizer, solvent extraction
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