Table 4.
Reported LODsa before and after recalculation.
| Analyte | Lab 1b | Lab 2 | ||||
|---|---|---|---|---|---|---|
| LOD prior to recalculation | LOD after recalculation | LOD reduction factorc | LOD prior to recalculation | LOD after recalculation | LOD reduction factorb | |
| Benzene | 0.0120 | 0.0030 | 4.0000 | 0.0100 | 0.0024 | 4.1667 |
| Ethylbenzene | 0.0340 | 0.0027 | 12.5926 | 0.0600 | 0.0023 | 26.0870 |
| Toluene | 0.0344 | 0.0030 | 11.4667 | 0.0600 | 0.0023 | 26.0870 |
| Total hydrocarbons | 0.3910 | 0.1139 | 3.4328 | 0.4900 | 0.0100 | 49.0000 |
| Total xylene | 0.0697 | 0.0057 | 12.2281 | 0.1900 | 0.0047 | 40.4255 |
| Cyclohexane | 0.0391 | 0.0026 | 15.0385 | NAd | NA | NA |
| n-Heptane | 0.0365 | 0.0024 | 15.2083 | NA | NA | NA |
| n-Hexane | 0.0625 | 0.0027 | 23.1481 | NA | NA | NA |
| Trimethylbenzenes | 0.0944 | 0.0064 | 14.7500 | NA | NA | NA |
| 2-Butoxyethanol | 0.0460 | 0.0151 | 3.0464 | NA | NA | NA |
| d-Limonene | NA | NA | NA | 0.2700 | 0.0067 | 40.2985 |
LOD, limit of detection.
a Sample duration of 720 min.
b Lab 1 primarily collected and analyzed offshore measurements; lab 2 primarily collected near shore and land measurements.
c Reduction factor = reported LOD/LOD after recalculation.
d Analyte not analyzed (NA) by lab.