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Part III: 1-25
Oil in Water Part III
Teledyne Analytical Instruments
4. Analytical Filter Paper. A supply of Scheicher & Schuell #588, size 24
cm., fast speed, natural finish, 0.008” thickness filter paper will be
required to properly prepare the sample water for use as zero and span
standardization fluids. Glass fiber filters, such as GF/C from Whatman,
may be used and are superior to paper filters. However, a disadvantage
in using this filter is that a Buchner funnel, aspirator flash, and water
aspirator must be used to pull the sample through the filter under
vacuum. The advantages are that its fine particle retention capabilities
are closely matched to the analyzer filter, and filtration proceeds much
faster than gravity feed through paper.
5.
Erlenmeyer Flask. Several 500 milliliter Erlenmeyer flasks will be
required to collect, prepare, and handle the sample water during the
preparation of the standardization fluids.
6. Beakers. At least two (2) one liter beakers will be required while
preparing the zero standardization fluid.
7. Sample Bottles. A number of one (1) gallon bottles will be required to
collect the sample for zero fluid preparation or corroborative lab analy-
sis. The bottles should always be thoroughly cleaned before use.
5.5.2 Acquisition of Representative Oil Sample.
A representative oil must be obtained from the user to be used for
calibration. When this oil is not readily available, skim off some of the oil
floating on the surface of the water treatment tanks and remove water and
solids with a centrifuge. Further dry over anhydrous sodium sulfate and
filter.
5.5.3 Acquisition of Representative Sample Water.
The sample water is important since it may contain compounds other
than oil which absorb at the measuring wavelength, causing background
interference which requires compensation.