Influence of Na and Ca on REE{sup +} intensities in the analysis of geological and related samples by ICP-MS
- Geological Survey, Jerusalem (Israel)
- NRCN, Beersheva (Israel)
Both enhancement and suppression of ion counts were observed when solutions containing up to 1000 and 500 mg/l Na and Ca, respectively, were analyzed by ICP-MS. Signal suppressions are considered to be due to physical interference effects in the sample introduction system while enhancements could be due to EIE effects in the plasma. The optimum nebulizer gas flow rates (at which maximum signal intensity was obtained) were generally mass dependent higher gas flows required for higher mass ions from about 0.45 l/min for {sup 9}Be to 0.55 for {sup 140}Ce. The temporal variation of up to 10% for a period of 100 min was compensated with the use of {sup 159}Tb as an internal standard. Using a matrix match calibration procedure, the data for a wide range of SRMs, decomposed using alkali fusions and mixed acid digestion, compared favorably with the recommended values. In spite of the high dilution factors due to total salt constraints, the determination limits of ICP-MS were superior to those of ICP-AES by about two orders of magnitude. REE chondrite and shale distributions were used to distinguish REE mineralization processes from normal sedimentary and igneous rocks.
- OSTI ID:
- 273577
- Report Number(s):
- CONF-960113-; TRN: 96:002920-0037
- Resource Relation:
- Conference: 9. biennial Winter conference on plasma spectrochemistry, Fort Lauderdale, FL (United States), 8-13 Jan 1996; Other Information: PBD: 1996; Related Information: Is Part Of 1996 Winter conference on plasma spectrochemistry; PB: 378 p.
- Country of Publication:
- United States
- Language:
- English
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