Effects of ionization potential of an element and boiling point of the corresponding oxide on the sensitivity of ICP-MS

Gray K S HO, Wan Waan Lee, Wing Tat Chan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

In this study, the sampling depth profiles of 19 elements in aqueous solution were obtained. The selected elements cover a wide range of atomic weights, ionization potentials, and oxide boiling points. The sampling position of maximum ICP-MS sensitivity of the elements depends on the boiling point of the corresponding oxide and the ionization potential of the elements. The boiling point determines the position in the ICP where significant vaporization of the dried aerosols occurs. In general, the peak position increases as the oxide boiling point of an element increases. However, the peak position for elements of high ionization potential and low oxide boiling point is downstream of the point of complete vaporization. The combined effect of analyte ionization potential and oxide boiling point on the optimized sampling position is illustrated by the linear plot of the difference in the temperature for significant ionization of an element and the boiling point of the corresponding oxide versus the oxide boiling point. The sampling depth profiles of single-particle ICP-MS of Au and ZrO2 nanoparticles and the corresponding standard solution are of similar shape. The peak maximum of the sampling depth profiles shifts to a slightly higher position for the refractory ZrO2 and large Au nanoparticles. The duration of particle vaporization for the nanoparticles becomes a significant factor in determining the peak position.

Original languageEnglish
Pages (from-to)2066-2073
Number of pages8
JournalJournal of Analytical Atomic Spectrometry
Volume30
Issue number10
DOIs
Publication statusPublished - 1 Oct 2015

Scopus Subject Areas

  • Analytical Chemistry
  • Spectroscopy

Fingerprint

Dive into the research topics of 'Effects of ionization potential of an element and boiling point of the corresponding oxide on the sensitivity of ICP-MS'. Together they form a unique fingerprint.

Cite this