Evaluation of purge-and-trap parameters: optimization using a statistical design
1998
Sucan, M.K. | Fritz-Jung, C. | Ballam, J.
Literature studies emphasize the importance of experimentally optimizing all purge-and-trap parameters to obtain adequate amounts of representative compounds for gas chromatographic analyses. Conventional "one variable at a time" evaluation of method parameters calls for exhaustive experimentation, systematically altering one variable at a time until an optimum point is attained. Response surface methodology was utilized in this study to determine the best combination of sampling parameters that maximized the amounts (with respect to proportion) of compounds isolated from dry pet foods. Purge time, sample size, and their interaction had the greatest effects on response. Quantities of volatile flavors isolated could be optimized and the sampling time could be reduced using response surface methodology.
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