Analytical performance of the Conical torch in inductively coupled plasma optical emission spectroscopy operating methanol and 1-propanol solutions

Abstract

This work explores, for the first time, the strengths and weaknesses of the Conical torch in ICP-OES operating methanol and 1-propanol solutions ranging from 30% to 100% w w-1. To...

Organics non-spectral interferences on nanoparticle characterization by means of single particle inductively coupled plasma mass spectrometry

“…To explain the results shown in Table 2, it should be considered that organics potentially affect (i) aerosol generation and transport, 24,26 (ii) discharge characteristics ( e.g. , plasma temperature), 24,30 and (iii) atomization/ionization mechanisms. 23,31–33 As it has been previously mentioned, Pt ionization is not affected by carbon-based charge transfer reaction 23 and, hence, only the two first phenomena are relevant to explain experimental data.…”

“…). 12,30,34 For this reason, carbon non-spectral matrix effects were also investigated using an alternative quadrupole-based ICP-MS instrument (Agilent 7700x) equipped with the same sample introduction employed in previous experiments ( i.e. , Micromist nebulizer coupled to a Scott double pass spray chamber).…”

“…Positive matrix effects for PtNP size distributions with organics were totally unexpected considering that this element is not affected by carbon charge-transfer reactions. 23 Nevertheless, it was observed that plasma was slightly contracted operating organics thus giving rise to a more energetic discharge (thermal pinch effect) 30 which favors Pt ionization ( i.e. , higher Pt pulses).…”

“…In the case of 6% w/w glycerol, no bias was found and, hence, water standards could be successfully employed for the accurate analysis of PtNP suspensions in this organic matrix, as it has been previously reported for ionic solutions. 23 To explain the results shown in Table 2, it should be considered that organics potentially affect (i) aerosol generation and transport, 24,26 (ii) discharge characteristics (e.g., plasma temperature), 24,30 and (iii) atomization/ionization mechanisms. 23,[31][32][33] As it has been previously mentioned, Pt ionization is not affected by carbon-based charge transfer reaction 23 and, hence, only the two rst phenomena are relevant to explain experimental data.…”

Atomic spectrometry update: review of advances in atomic spectrometry and related techniques

“…Well established sources can also be modified to improve performance. Grindlay et al 71 evaluated the performance of a conical torch for axial ICP-OES when introducing methanol and 1-propanol solutions. The conical torch differed from the Fassel torch in that it had a flared end and only carrier and outer gas flows.…”