Patent ID: 7995203

Claim:
Method for drug detection in a drug sample comprising the steps of: a) preparing a liquid sample from a drug sample for analysis; b) introducing an aliquot of a liquid sample of the drug into a measuring cell of a Spectral Fluorescence Signatures (SFS) device; c) measuring the SFS of the aliquot liquid sample to obtain a reference value of SFS; d) adding acid into the liquid sample; e) introducing the acidified aliquot liquid sample into the measuring cell of the SFS device; f) measuring the SFS of the acidified aliquot liquid sample; and g) comparing the reference value and the result of the measurement of SFS of the acidified aliquot liquid sample, wherein if: i) the SFS of the acidified aliquot liquid sample exceeds the reference value Cocaine base is present in the drug sample ii) SFS of the acidified aliquot liquid sample is below the reference value or is equal to the reference value, and the reference value is not zero, Cocaine hydrochloride is present in the drug sample; and iii) the SFS of the acidified aliquot liquid sample equals the reference value and the reference value is zero, Cocaine is not present in the drug sample.