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When testing gasoline range organics (GRO) in water, 10 mL of the water sample is
measured out and transferred to an extraction jar. 10 mL of methanol solvent
is then added to the jar and the extract is shaken for about one minute,
giving the solvent ample time to dissolve the contamination. The sample is
then poured into a glass cuvette and placed into the UVF-3100 for analysis,
which is calibrated using Sitelab's GRO Calibration Kit (CAL-025) on the
Slot B optics. |
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Sitelab's GRO samples arrived in a
cooler on ice and were provided in 40 mL VOA vials.
Samples contained deionized water spike with commercial grade
50% weathered unleaded gasoline.
The certified spiked
concentration was
3.47 mg/L.
Sitelab's GRO was 3.33 mg/L.
<Click
here for more details>
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Computer
printout of GRO test results using
Sitelab's software included with the
UVF-3100 analyzer. Results in ppm (mg/L).
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