Event Title

Developments in Chromium Emission Spectroscopy with a Tungsten Coil Atomizer

Presenter Information

Katja Hall, Winthrop University

Faculty Mentor

Cliff Calloway, Ph.D.

College

College of Arts and Sciences

Department

Chemistry, Physics and Geology

Location

DiGiorgio Campus Center, Room 221

Start Date

24-4-2015 4:05 PM

Description

Tungsten coil atomic emission spectrophotometry (WCAES) is a dependable way to visualize chromium emission. The WCAES spectrophotometer is smaller than commercial inductively coupled plasma optical emission spectrophotometers (ICP-OES). The WCAES system uses a commercially available tungsten bulb as the emission source, interfaced to a programmable, constant-current power supply, and Ocean Optics CCD spectrophotometer to detect emission signals. The WCAES requires less power, no water-cooling and much less argon gas than commercial ICP-OES. Incorporating a smaller aluminum housing for the atomizer and modifying the WCoil control software to allow multi-step temperature ramping and automated solvent removal provides more precise control over the atomizer temperature than any other commercially available atomizer. The added control over temperature allows the WCAES to thermally separate metals for emission measurements. Chromium(III) and chromium(VI) provide a unique test case for the improved capabilities. Chromium(VI) is regarded as a highly toxic form of chromium compared to chromium(III). Using the thermal ramping and temperature control of the WCAES system provides a low-cost alternative to conventional methods using ion chromatography interfaced to ICP-OES.

Comments

Supported by an NIH-INBRE grant from the National Center for Research Resources and the National Institute of General Medical Sciences

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Apr 24th, 4:05 PM

Developments in Chromium Emission Spectroscopy with a Tungsten Coil Atomizer

DiGiorgio Campus Center, Room 221

Tungsten coil atomic emission spectrophotometry (WCAES) is a dependable way to visualize chromium emission. The WCAES spectrophotometer is smaller than commercial inductively coupled plasma optical emission spectrophotometers (ICP-OES). The WCAES system uses a commercially available tungsten bulb as the emission source, interfaced to a programmable, constant-current power supply, and Ocean Optics CCD spectrophotometer to detect emission signals. The WCAES requires less power, no water-cooling and much less argon gas than commercial ICP-OES. Incorporating a smaller aluminum housing for the atomizer and modifying the WCoil control software to allow multi-step temperature ramping and automated solvent removal provides more precise control over the atomizer temperature than any other commercially available atomizer. The added control over temperature allows the WCAES to thermally separate metals for emission measurements. Chromium(III) and chromium(VI) provide a unique test case for the improved capabilities. Chromium(VI) is regarded as a highly toxic form of chromium compared to chromium(III). Using the thermal ramping and temperature control of the WCAES system provides a low-cost alternative to conventional methods using ion chromatography interfaced to ICP-OES.