Campus Units

Chemistry, Ames Laboratory

Document Type

Conference Proceeding

Conference

Proceedings of SPIE - Environmental Monitoring and Remediation Technologies

Publication Version

Published Version

Publication Date

2-10-1999

Journal or Book Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

3534

First Page

478

Last Page

486

DOI

10.1117/12.339029

Conference Title

Environmental Monitoring and Remediation Technologies

Conference Date

November 1998

City

Boston, MA

Abstract

A spectrometer system consisting of a quartz acousto-optic tunable filter (AOTF) and an echelle grating has been assembled and tested for ICP-AES continuous emission monitoring of heavy metal and actinide elements in stack exhaust offgases introduced into an air plasma. The AOTF is a rapidly tunable bandpass filter that is used to select a small wavelength range (0. 1 to 0.6 am) of optical emission from the air plasma; the echelle grating provides high dispersion, yielding a spectral resolution of approximately 0.004 to 0.008 nm from 200 to 425 nm. The AOTF-echelle spectrometer, equipped with a photodiode array or CCD, provides rapid sequential multielement analysis capabilities. It is much more compact and portable than commercial ICP-AES echelle spectrometers, allowing use ofthe system in field and on-line process monitoring applications. Data will be presented that detail the resolution, detection limits, capabilities, and performance of the AOTFechelle spectrometer for continuous emission monitoring of heavy metals (As, Be, Cd, Cr, Hg, and Pb) and actinides (including U isotopes). The potential use of the AOTF-echelle spectrometer with other emission sources and for other monitoring applications will be discussed.

Comments

This article is from Proceedings of SPIE - The International Society for Optical Engineering 3534 (1999): 478, doi: 10.1117/12.339029.

Rights

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Language

en

File Format

application/pdf

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