Accession Number:

ADA183212

Title:

A High Pressure Inductively Coupled Plasma Torch.

Descriptive Note:

Interim rept.,

Corporate Author:

ARIZONA UNIV TUCSON DEPT OF CHEMISTRY

Personal Author(s):

• Smith,Thomas R.
• Denton,M. B.

Report Date:

1987-05-26

Pagination or Media Count:

20.0

Abstract:

An Inductively Coupled Plasma ICP torch utilizing an extended coolant tube that tapers down to a small exit orifice designed to increase the pressure within the ICP torch is described. This torch design makes use of the advantages associated with higher torch operating pressures, including improved detection limits, increased sensitivity and better plasma stability, without requiring major modifications to existing commercially available ICP torch box and matching networks. Detection limits obtained utilizing the new torch design are compared to those obtained from several commonly used torch designs using a commercially available torch box and spectrometer. A two- to seven- fold improvement in detection limits is observed through increasing torch operating pressure from 101.325 KPa 760 torr, or atmospheric pressure to 120 KPa900 torr. Keyword Emission spectrometer.

Descriptors:

• *PLASMA DEVICES
• *TORCHES
• *PLASMAS(PHYSICS)
• *EMISSION SPECTROSCOPY
• BAROMETRIC PRESSURE
• COUPLING(INTERACTION)
• SPECTROMETERS
• EXITS
• ORIFICES
• DETECTION
• LIMITATIONS
• HIGH PRESSURE
• STABILITY

Subject Categories:

• Plasma Physics and Magnetohydrodynamics
• Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE