Ultra-trace Measurements of super(210)Pb in natural occurring radioactive materials by ICP-MS

Collision cell inductively coupled plasma mass spectrometry (CC-ICP-MS) was investigated as a possible alternative to nuclear analytical techniques for the determination of super(210)Pb. The formation of isobaric and polyatomic interferences was studied. Following the acid digestion, extraction chro...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2010-04, Vol.615 (2), p.237-241
Main Authors: Amr, MA, Al-Saad, KA, Helal, AI
Format: Article
Language:English
Subjects:
Accelerators
Chromatography
Extraction
Inductively coupled plasma
Mathematical analysis
Norms
Optimization
Radioactive materials
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Summary:Collision cell inductively coupled plasma mass spectrometry (CC-ICP-MS) was investigated as a possible alternative to nuclear analytical techniques for the determination of super(210)Pb. The formation of isobaric and polyatomic interferences was studied. Following the acid digestion, extraction chromatography was tested to assess their usefulness in reducing its interferences. A super(210)Pb pre-concentration of >300-fold and recoveries of 63-73% were obtained using a combined extraction chromatography and pre-concentration by evaporation protocol. Improvement in sensitivity of super(210)Pb was found by optimization of the collision cell parameters using krypton as a collision gas. The detection limit was improved by a factor of 300 for super(210)Pb. A detection limit of 0.214 ppt (0.698 Bq/mL) was obtained. The method was applied to determine super(210)Pb in samples of naturally occurring radioactive materials (NORM).
ISSN:0168-9002
DOI:10.1016/j.nima.2010.01.036