INTRODUCTIONQuadrupole‐based inductively coupled plasma mass spectrometry (ICP‐QMS) is an established and widely used analytical tool mainly used for trace analysis. The combination of high sensitivity and the possibility of analysing isotopes of an element offers special opportunities in comparison with other analytical devices developed for elemental analysis. The isotopic composition of an element in a sample is an additional piece of information that hardly any other device is able to provide simultaneously, especially at trace concentrations of an element.Different applications of isotope ratio determination by ICP‐QMS have been reported: the identification of the origin of diverse food products, U‐Pb dating analysis and, in particular, since the Fukushima nuclear accident, investigation of radioactive isotope ratios to identify the release sources.The difficulties involved in obtaining the additional information of isotopic composition are the required precision and accuracy of the measurement of isotope ratios.Many groups have tried to characterise and improve the precision of isotope ratio determination with ICP‐QMS. For example, Monna et al described the optimum integration times of measured isotopes depending on their isotopic composition for lead (Pb) and strontium (Sr).Some approaches are based on changes in hardware such as that by Gray et al (using a free expansion interface
Rapid Communications in Mass Spectrometry – Wiley
Published: Jan 15, 2018
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