Oil in Water | Part III | |
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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.
5.5.2Acquisition 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.
5.5.3Acquisition 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.
Teledyne Analytical Instruments | Part III: |
