Direct lead isotopic analysis of bioethanol by means of multi-collector ICP-mass spectrometry with a total consumption sample introduction system

Abstract

A method has been developed for the direct (no sample pretreatment and/or isolation of the target element from the sample matrix) Pb isotopic analysis of bioethanol via multi-collector ICP-mass spectrometry (MC-ICP-MS).

Determination of trace elements in undiluted wine samples using an automatized total sample consumption system coupled to ICP-MS

“…As previously reported for the ICP-MS analysis of other complex matrices by hTISIS, 46,48,49 the spray chamber temperature and the liquid flow rate are crucial variables, significantly affecting both the sensitivity and matrix effects. To evaluate the effect of these parameters on sensitivity for this specific matrix, a nondiluted wine sample was spiked with the multielement solution at a 50µg kg -1 concentration and the ion intensity was measured for various nuclides at temperatures ranging from 50ºC to 300ºC.…”

“…As an alternative to these approaches, the use of the high temperature torch integrated sample introduction system (hTISIS) has been proposed and successfully applied for the analysis of complex matrices. 46,47,48,49 The basic principle of this low sample consumption system relies on the achievement of complete aerosol evaporation before its introduction into the plasma source, thus accomplishing analyte transport efficiency close to 100% regardless the sample matrix. This point allows applying the so-called universal calibration.…”

Prospect on Rare Earth Elements and Metals Fingerprint for the Geographical Discrimination of Commercial Spanish Wines

“…As an alternative to these approaches, the use of the high temperature torch integrated sample introduction system (hTISIS) has been proposed and successfully applied for the routine analysis of wine samples [26]. The basic principle of this low sample consumption system relies on the achievement of complete aerosol evaporation before its introduction into the plasma source, thus accomplishing analyte transport efficiency close to 100% regardless of the sample matrix [26,38,39]. Additional advantages of the hTISIS over conventional sample introduction systems include the improvement of sensitivity and limits of detection, as well as the shortening of wash out times.…”