Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

A Controlled-atmosphere Plasma Arc for Emission Spectrography of Nonmetal Elements.

Authors
Heemstra-RJ
Source
Appl Spectroscopy November/December 1970 1970 24(6):568-572
Link
NIOSHTIC No.
10010462
Abstract
To estimate the weight percents of certain nonmetal elements in organic compounds found in petroleum reservoirs, the Bureau of Mines designed and constructed a controlled-atmosphere plasma arc which effectively excludes air from the plasma. Selected organic compounds that contained nonmetal elements were mixed with a solvent essentially free of those elements. The weight percents of the nonmetal elements were estimated from the produced diatomic spectral bands; results were reasonably accurate. Analytical working curves were prepared for nitrogen in the range from 15 to 450 ag for 100 mg samples using the analytical carbon-nitrogen band at 3,883 oa and the internal standard carbon-carbon band at 3,607 oa. Curves also were prepared for hydrogen, sulfur, and oxygen that had limited sensitivity to detection. Another indicated application of this plasma arc is for characterization of high-boiling petroleum fractions in liquid chromatographic effluents. The rates at which diatomic species are produced and destroyed directly influence the intensity of each corresponding band spectrum.
Publication Date
19700101
Document Type
OP;
Fiscal Year
1970
NTIS Accession No.
NTIS Price
Identifying No.
OP 9-71
Issue of Publication
6
NIOSH Division
BERC;
Source Name
Appl. Spectroscopy, November/December 1970, V. 24, No. 6, PP. 568- 572
TOP