executed by the spectrum analysis apparatus shown in FIG. 1 to identify a peak associated with a calibration compound in a test spectrum; FIGS. 10A and 10B are a flow chart of the process for identifying compounds, shown in FIG. 5, in greater detail; FIG. 11 is a flow chart of a process executed by the spectrum analysis apparatus for determining a pH value from the test spectrum; FIG. 12 is a flow