Method of determining a total HF concentration metric in an environmentincludingmeasuring an uncorrected HF concentration metric in the environment based on afirstinfrared absorption measurement at a wavelength corresponding to a vibrationalfrequency ofa non-hydrogen bonded gas phase HF molecule; determining an ambient H2Oconcentrationmetric in the environment available for reaction with the non-hydrogen bondedgas phase HFmolecules at or about the time of obtaining the first infrared absorptionmeasurement;calculating a HF hydrate concentration metric in the environment based on theuncorrectedHF concentration metric, the ambient H2O concentration metric and a reactionequilibriumrelationship between the non-hydrogen bonded gas phase HF molecule and the HFhydrate;and determining the total HF concentration metric in the environment based ontheuncorrected HF concentration metric and an amount of HF determined by the HFhydrateconcentration metric.
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