Skip to main content

Spectrochemical Analysis of Liquids Using Laser-Induced Plasma Emissions: Effects of Laser Wavelength on Plasma Properties

Buy Article:

$29.00 plus tax (Refund Policy)

Abstract:

We spectroscopically determined the temperature and electron density of the plasma plumes produced by pulsed-laser ablation of aqueous solutions containing sodium, lithium, and rubidium. With the use of a Nd:YAG laser at 532 nm and fluence of 3 J/cm2, the plasma produced was hot (low eV range) and extensively ionized, with electron density in the 1018 cm -3 range. Analyte line signals were initially masked by intense plasma continuum emissions and would only emerge briefly above the background when the plume temperature dropped below 1 eV during the course of its very rapid cooling. Since ionization was thermally induced, the intense plasma flash was inevitable. In contrast, 193-nm laser ablation at similar fluence generated plasmas of much lower ( < 1 eV) temperature but comparable electron density. Plasma continuum emissions were relatively weak, and the signal-to-background ratio was a thousand times better. Consequently, this ''cold'' plasma was ideal for sampling biologically important elements such as sodium, potassium, and calcium.

Keywords: SPECTROCHEMICAL ANALYSIS OF LIQUIDS PULSED-LASER ABLATION LASER-INDUCED PLASMA PLASMA TEMPERATURE ELECTRON DENSITY ATOMIC EMISSION SPECTROSCOPY

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702971941638

Publication date: July 1, 1997

More about this publication?
sas/sas/1997/00000051/00000007/art00009
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more