Table 2.
Overview of data sets generated for this study. Three different chromatographic methods and FIA were used. Most of the features that were detected above blank levels also exhibited a time-dependent trend in a likelihood ratio test using spline models (see methods section for details).
| Method Name | Polarity | # Features | % Features above Blank | % Features above Blank and with Time Trend |
|---|---|---|---|---|
| FIA | - | 1887 | 44.4 | 31.0 |
| FIA | + | 2416 | 52.7 | 28.4 |
| LC-QTOF HILIC | - | 1671 | 31.2 | 26.3 |
| LC-QTOF Polar RP | + | 1549 | 32.8 | 25.8 |
| LC-QTOF Lipids | - | 1745 | 57.9 | 53.4 |
| LC-QTOF Lipids | + | 1819 | 57.6 | 56.6 |