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Determination of Henry’s Law Constants Using Internal Standards with Benchmark Values
Citation:
Hiatt, Mike. Determination of Henry’s Law Constants Using Internal Standards with Benchmark Values. P. Mathias (ed.), ENVIRONMENTAL SCIENCE AND TECHNOLOGY. John Wiley & Sons, Ltd., Indianapolis, IN, 58(4):902-908, (2013).
Impact/Purpose:
Work performed to develop a streamlined way to assess volatility of new compounds. volatility determined as Henry's law constant which is also used to assess atmospheric transport. work reports henry's law constant for many compounds that have not had the constants determined.
Description:
It is shown that Henry’s law constants can be experimentally determined by comparing headspace content of compounds with known constants to interpolate the constants of other compounds. Studies were conducted over a range of water temperatures to identify temperature dependence. The Henry’s law constants for a suite of mostly labeled compounds intended for use as internal standards were determined and these internal standards were then used to determine the constants for 89 compounds. This approach was found to correlate well with average of published values for the compounds in the study (0.99) and a very good correlation (>.99999) when compounds had measurements from more than two sources.