1Chemistry Department, Carnegie Institute of Technology, Pittsburgh, Pennsylvania
2Research and Development Division, Office of Synthetic Fuels, U. S. Bureau of Mines, Central Experiment Station, Pittsburgh, Pennsylvania
2Initial work on this subject submitted in partial fulfillment of the requirements for the degree of Doctor of Science at Carnegie Institute of Technology.
A method of high accuracy applicable to various prisms in infra-red spectrometry has been used to calibrate NaCl and KBr prisms. The method requires only a small number of experimental bands, is practically independent of resolving power, provides an extensive wave-length range, and permits a tabulated calibration without the necessity of drawing calibration curves. The procedure is described in detail with an example.
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Values for points IV and XIII inclusive obtained from R. A. Oetjen, C. L. Kao, and H. M. Randall, Rev. Sci. Inst. 13, 515 (1942).
All screw-turn values corrected for small, uncompensated temperature shifts, etc., using 4.225μ CO2 band as base point.
The 13.417μ NH3 band was included formerly, but because of unreproduceability due to broadness it has been omitted.
Values for points IV and XIII inclusive obtained from R. A. Oetjen, C. L. Kao, and H. M. Randall, Rev. Sci. Inst. 13, 515 (1942).
All screw-turn values corrected for small, uncompensated temperature shifts, etc., using 4.225μ CO2 band as base point.
The 13.417μ NH3 band was included formerly, but because of unreproduceability due to broadness it has been omitted.