SWGDRUG has compiled a mass spectral library from a variety of sources, containing drugs and drug-related compounds. All spectra were collected using electron impact mass spectrometry systems. This library is available for download from this website. SWGDRUG recommends the use of traceable reference materials to support identifications of drugs ( Part IV A – Quality Assurance Section 6.1.6 ). In addition, this library has been and will continue to be validated by NIST.