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.
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. 35. The method of claim 32 , wherein the sample identity information comprises a determination that the sample does not comprise any of the candidates if the overlap between the range of expected values and the measurement values for each of the candidates is zero.