ANALYTICAL TECHNIQUES FOR THE DETERMINATION OF TRACE IMPURITIES IN CADMIUM SULFIDE.
Final rept. 1 Jun 65-31 May 68,
BELL AND HOWELL RESEARCH LABS PASADENA CALIF
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Mass spectrographic techniques were developed for the analysis of all II-VI compounds. The detection limits for most impurities are less than 10 parts per billion atomic. Covered in detail are new techniques which significantly reduced the time required to perform analyses as compared to work performed under a prior contract. A total of 286 samples were analyzed. Primary interest was in the analysis of all forms of CdS, CdSe, ZnS, ZnSe, and other II-VI compounds. Extensive work was performed in the area of selective ionization of atoms by the spark source mass spectrometer. Studies were also made covering the effects of residual gases in the source of the mass spectrometer on analyses for O, C, N, and H. Automatic exposure equipment, multiple sample holders, and special sample holders and their value with relation to this work is discussed. Author
- Inorganic Chemistry
- Solid State Physics