TABLE I

Distribution of RRFs Related to Compounds in the Database for HS-GC-MS, GC-MS, Derivatization GC-MS, and LC-MS (APCI & ESI)

ParameterHS-GC-MSaGC-MSDeriv. GC-MSLC-MS (APCI & ESI)
Total number of entries98730764081985
Total number of entries with RRFs24622474081129
RRFs < 0.122%7%3%33%b
Median RRF0.640 (0.909)c0.590 (0.628)0.949 (0.960)0.251 (0.541)b
Mean RRF0.799 (0.997)0.645 (0.687)0.989 (1.017)0.543 (0.749)b
Standard Deviation0.811 (0.728)0.425 (0.407)0.530 (0.512)0.921 (0.651)b
Minimum RRF<0.001<0.0010.008<0.001b
Maximum RRF5.3904.6113.54716.500b

  • ↵a Data obtained by analysis of standard solutions prepared in ultrapure water (UPW).

  • ↵b LC-MS (APCI) RRF Data.

  • ↵c Values in parentheses correspond to the subset of “quantifiable” data with RRF values between 0.1 and 5.0.