32. The method of claim 1 , wherein determining whether sample identity information can be obtained comprises: determining, for each candidate, a range of expected values of the measured spectral information based on the reference information; determining a range of measurement values based on the measured spectral information and an estimate of a variability of the measured spectral information; and determining, for each candidate, an overlap between the range of expected values of the measured spectral information and the range of measurement values.
37. The method of claim 32 , wherein the characteristic of the measurement system is adjusted to reduce the overlap between the range of expected values and the range of measurement values for at least one of the candidates.