Isotope dilution with ICP-MS—simplified uncertainty estimation using a robust procedure based on a higher target value of uncertainty

Atomic spectrometry update. Atomic mass spectrometry

“…A simplified calculation of ID-ICP-MS uncertainty budgets included only those components that contributed significantly to the uncertainty. 120 In the approach adopted, a target uncertainty value was set based on the requirements of the analysis. The calculated uncertainly included only components that were estimated to be at least 20% of the target value.…”

Inductively Coupled Plasma Mass Spectrometry

“…Some simple tricks can help simplify the procedure, such as using the same analytical balance within a short period of time for weighing the samples being spiked so that some corrections and uncertainty components cancel out (227). With the use of the single ID method, a model equation was built, where additional factors were allowed to vary within a wide, robust tolerance window and only those factors that had a significant effect at the target uncertainty level were taken into account (227). However, more commercially available spike solutions that are well characterized are needed for single ID (227).…”

“…With the use of the single ID method, a model equation was built, where additional factors were allowed to vary within a wide, robust tolerance window and only those factors that had a significant effect at the target uncertainty level were taken into account (227). However, more commercially available spike solutions that are well characterized are needed for single ID (227). When performing species-specific double-spike ID to compensate for bidirectional species interconversion, cumbersome calculations are required to obtain the analytical results.…”

“…Some simple tricks can help simplify the procedure, such as using the same analytical balance within a short period of time for weighing the samples being spiked so that some corrections and uncertainty components cancel out . With the use of the single ID method, a model equation was built, where additional factors were allowed to vary within a wide, robust tolerance window and only those factors that had a significant effect at the target uncertainty level were taken into account . However, more commercially available spike solutions that are well characterized are needed for single ID .…”

Reference Measurements for Priority and Essential Trace Elements and Methyl Mercury with Isotope Dilution Inductively Coupled Plasma-Mass Spectrometry for Seafood Safety Assessment and CRM Production

“…In the last decades, European Commission designed and implemented a series of regulations and guidelines establishing the maximum allowable levels of some contaminants in foodstuff by Regulation (EC) No 1881/2006 (Commission Regulation of European Commission 2014) in order to protect humans from the effects of chemical contaminants and to guarantee worldwide health. For the important decisions concerning regulatory compliance reliable measurement results and high-quality reference values are of high importance, the latter being those that are reliable, have sufficiently small uncertainty values (so that others can refer to them) and a demonstrated traceability to the common system of references and whose measurement procedure is validated (Magnusson et al 2005).…”