Statistical Analysis of a Database of Response Factors
| Item | Value per Detection Methoda | |||||
|---|---|---|---|---|---|---|
| MS, + Ion | MS, − Ion | UV, 230 nm | CAD | GCMS | FID | |
| nb | 156 | 73 | 113 | 122 | 129 | 129 |
| Mean | 1.0c | 1.0c | 1.0c | 1.0c | 1.0c | 1.0c |
| Standard Deviation | 1.1 | 1.2 | 0.60 | 0.65 | 0.52 | 0.54 |
| % RSD | 108% | 119% | 60% | 65% | 52% | 54% |
↵a The detection methods were as follows: MS, + is mass spectrometry, positive ion mode; MS, − is mass spectrometry, negative ion mode; UV is ultraviolet-visible detector; CAD is charged aerosol detector; GCMS is gas chromatography mass spectrometry; and FID is flame ionization detection.
↵b The total number of analytes investigated in this study (10) was 217. Mutliple analytes produced no response in one or more of the detection methods.
↵c The response factors for the individual analytes were divided by the mean response factor for the entire database, thus producing a mean of 1.0.