Tech Tip 30: Analysis of Unknowns - How? - Libraries! Part III: GC-MS
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In GC-MS, library integrity has massively evolved compared to 25 years ago. In those times the NBS library had 72000 compounds, this was superseded by a Wiley library of 230000 compounds in the late 90’s that for the first time contained multiple synonyms, greatly helping identifications. NIST libraries became mainstream around the year 2002 and are re-issued every three years.