Accession Number : ADA113470

Title :   The Role of Observation Height in Some Interferences Reported in Oil Analysis by Atomic Absorption Spectrophotometry.

Descriptive Note : Technical rept.,


Personal Author(s) : Algeo,J D ; Denton,M B

PDF Url : ADA113470

Report Date : 12 Feb 1982

Pagination or Media Count : 9

Abstract : Reports have appeared which indicate that the type of organometallic complex used in the preparation of standards for the determination of metals in oil by atomic absorption spectrophotometry (AAS) can influence the sensitivity of the method. Because the type of complexes existing in a given oil sample may not be known, this represents a possible interference on the determination. Recent work has shown that similar interferences can exist in the inductively coupled plasma (ICP), if observations are carried out near the load coil. The interferences were not seen when observations were made high in the plasma discharge. The reported AAS interferences were observed very low in the flame, just above the burner. In contradiction to usual experience, the magnitudes of the reported interferences were greater in the nitrous oxide-acetylene flame than in the air-acetylene flame. Since observation height was found to affect the ICP results, an investigation of the role of observation height upon the reported interference on nickel absorption, as well as its effect on iron absorption was made.

Descriptors :   *Oils, *Atomic spectroscopy, *Spectrophotometry, *Absorption spectra, Standardization, Interference, Organometallic compounds, Sensitivity, Flames, Plasmas(Physics), Acetylene, Nitrous oxide, Air, Iron, Nickel, Observation, Height

Subject Categories : Lubricants and Hydraulic Fluids
      Test Facilities, Equipment and Methods
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE