An experiment was designed to explore the use of a quartz crystal microbalance (QCM) in measuring the amount of an anesthetic gas absorbed by a thin protein film. The weak binding that occurs between anesthetic gas and proteins enables the minute mass changes to be measured using a QCM, which can measure masses down to the range of � 2 ng. After initial measurements were taken, the experimental design was reevaluated to isolate noise in the frequency signals that may have interfered with accurate data collection.