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Fig. 4 | Environmental Sciences Europe

Fig. 4

From: A European proposal for quality control and quality assurance of tandem mass spectral libraries

Fig. 4

Overview on the average match probability (amp) distribution obtained from matching 352 positive controls representing 87 compounds part of the UFZ library to the WRTMD. An amp-threshold of 5.0 was used to distinguish between positive and negative matches. The overall sensitivity was 89.7%. For 70 compounds, all test spectra led to positive matches with amp>5.0. For sixteen compounds at least one test spectrum retrieved an amp-value below the specified threshold of 5.0 indicating insufficient similarity between test and reference spectra

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