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The Determination of HF, HCI, SiF4, and HCF3 in WF6 Gas

Volume 28, Number 2 (April 1974) Page 139-142

Chaney, C.L.; Chin, J.


An infrared absorption method in the 1- to 15-μ range has been developed for determining HF, HCl, HCF3, and SiF4 in WF6 gas. Because of the reactivity and corrosiveness of WF6, a special gas absorption cell and gas-sampling apparatus were designed and built. Calibration curves were generated for a 10-cm cell. Sensitivity values were 100 wppm for HF and HCl, and 10 wppm for HCF3 and SiF4.