Direct Determination of Trace Elements in Graphite Matrices Using Modulated Glow Discharge Atomic Absorption Spectrometry

$29.00 plus tax (Refund Policy)

Buy Article:


The trace element concentrations in high-purity graphites were determined by atomic absorption spectrometry (AAS) with the use of a modulated glow discharge atomizer. Glow discharge power was modulated at 50 Hz to enhance sensitivity and to permit time-resolved atomic absorption measurements. The influence of discharge operating parameters including current, pressure, and plasma sampling on the analytical performance of this technique was investigated. This analytical technique was evaluated in terms of stability, sensitivity, reproducibility, and accuracy. The method of standard additions was used to determine the impurity levels of the standard graphite matrix. Linear analytical calibration curves were constructed for four elements of interest in samples of nulear-grade graphite. Detection limits for these elements were calculated to be in the tens of parts-per-billion range for graphite matrices.

Keywords: Atomic absorption spectrometry; Cathodic sputtering; Direct solids analysis; Glow discharges; Graphite analysis

Document Type: Research Article


Affiliations: Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506-6045

Publication date: March 1, 1993

More about this publication?
Related content



Share Content

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
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