Degree Type

Dissertation

Date of Award

2012

Degree Name

Doctor of Philosophy

Department

Chemistry

First Advisor

Robert S. Houk

Abstract

This dissertation describes a variety of studies meant to improve the analytical performance of inductively coupled plasma mass spectrometry (ICP-MS) and laser ablation (LA) ICP-MS. The emission behavior of individual droplets and LA generated particles in an ICP is studied using a high-speed, high frame rate digital camera. Phenomena are observed during the ablation of silicate glass that would cause elemental fractionation during analysis by ICP-MS. Preliminary work for ICP torch developments specifically tailored for the improvement of LA sample introduction are presented. An abnormal scarcity of metal-argon polyatomic ions (MAr+) is observed during ICP-MS analysis. Evidence shows that MAr+ ions are dissociated by collisions with background gas in a shockwave near the tip of the skimmer cone. Method development towards the improvement of LA-ICP-MS for environmental monitoring is described. A method is developed to trap small particles in a collodion matrix and analyze each particle individually by LA-ICP-MS.

Copyright Owner

Christopher Hysjulien Ebert

Language

en

File Format

application/pdf

File Size

163 pages

Video1.avi (1064 kB)
Video2.avi (824 kB)
Video3.avi (659 kB)
VideoA.avi (1217 kB)
VideoB.avi (1228 kB)
VideoC.avi (1284 kB)
VideoD.avi (1162 kB)

Share

COinS