“…IMS is a highly sensitive technique that can be used to analyze the composition of gas mixtures, including many of the target gases such as ammonia, hydrogen chloride, hydrogen iodide, iodine, phosphine, acetic anhydride, hexane, methylamine, and more. IMS detectors use either a radioactive or chemical ionization source [84]. Practical challenges of IMS include competitive ion/ molecule reactions with matrix molecules, susceptibility to contamination, and problems with low temperature operation [85].…”