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Table 5 MetFrag Score breakdown by scoring term for the top 4 candidates for m/z 278.1062 (ultimately identified as metazachlor with Level 1 confidence)

From: Retrospective non-target analysis to support regulatory water monitoring: from masses of interest to recommendations via in silico workflows

MetFrag Scoring terms

Candidate 1

DTXSID4058156

Candidate 2

DTXSID90916646

Candidate 3

DTXSID40736053

Candidate 4

DTXSID30150421

Spectral terms (raw scores)

 FragmenterScore

95.30

18.00

61.52

47.52

 OfflineMetFusion

4.64

3.65

3.25

2.99

 OfflineIndivMoNA

1.00

0

0

0

Metadata terms (raw scores)

 CPDAT_COUNT

0

0

0

0

 DATA_SOURCES

47

2

1

7

 KEMIMARKET_EXPO

16

0

0

0

 KEMIMARKET_HAZ

9

0

0

0

 NORMANSUSDAT

1

0

0

0

 REACH2017

1

1

0

0

 INDACT

0

0

0

0

MetFrag Score (weighted)

 Total

7.00

1.52

1.37

1.29

  1. Raw scores are given for interpretability; the maximum raw score over all candidates (used to normalise for the ranking) is indicated in bold. The final MetFrag Score is a sum of the normalised and weighted scoring terms as described in the Methods. Here, Candidate 1 has the highest overall MetFrag Score, supported by both spectral and metadata scoring terms. Full details on the candidates are available in MassIVE