Benchmark TD-550 - Analyzing 0-100 Ppm Oil-In-Water Samples

TD-550/560 Oil in Water Analyzer No-Solvent Analysis Method
PN 106737
REV H
TD-550/560 Oil in Water Analyzer
Operation Manual
25
The calibration is now complete. The calibration will be stored and maintained when the analyzer is
turned off.
For video tutorials on calibrating the analyzer, see the How to Video Library on the Help & Settings
screen.
5.3 ANALYZING 0-100 PPM OIL-IN-WATER SAMPLES
To prepare the background (WSO) sample
1. Open the process sample valve and allow water to run for at least 15 seconds.
2. Fill the bottle labeled BKG to the neck with process water.
NOTE: Make sure that the BKG bottle is clean and dry and that no OIW Surfactant has been added.
3. Cap the bottle and allow it to cool to room temperature.
4. Fill a 3 mL syringe with BKG water.
5. Attach a syringe lter to the end of the syringe.
6. Press the syringe plunger to force liquid through the lter and into the BKG cuvette. Continue
until the cuvette is ½ to ¾ full.
To prepare the OIW sample
1. Add 3 mL of OIW Surfactant to the OIW bottle.
2. Open the process valve and purge the sample valve by allowing the water to ow at a high rate
for at least 1 minute.
3. Adjust the sample valve until the water is owing at a rate of ~10 mL per second. Allow the
water to ow at this rate for at least 15 seconds.
4. Allow water to ow into the OIW bottle until the liquid level reaches the 100 mL mark.
5. Cap the bottle and shake it vigorously for at least 15 seconds.
6. If the contents of the bottle are uniformly milky-white, it is not necessary to perform Steps 7
through 9. You may skip to Step 10.
7. Place the OIW bottle in the hot water bath and heat it until the contents of the bottle are
uniformly milky-white.
8. Put on heat-resistant gloves suitable for handling glass bottles at boiling water temperature
(212 °F, 100 °C).
9. Remove the bottle from the hot water.
10. While the contents are still milky-white, shake the bottle vigorously for at least 30 seconds.
11. Allow the OIW sample to cool until the contents change from milky-white to clear.
NOTE: You may accelerate cooling by placing the OIW bottle in a refrigerator or a container of cold
water. You may also mix the sample thoroughly and immediately pour ~5 mL into a small disposable
beaker. The small volume will cool more quickly than the original sample bottle.
12. Fill a 3 mL syringe with the OIW sample.
13. Attach an unused syringe lter to the end of the syringe.
14. Press the syringe plunger to lter the liquid into the 8 mm cuvette marked OIW. Continue until
the cuvette is ½ to ¾ full.
For video tutorials on preparing samples, see the How to Video Library on the Help & Settings screen.