Measurement
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Oil content in or on solids
Directly immerse the part in the solvent to extract the oil content.
Although an ultrasonic cleaner can be used for extraction. The solvent volatilization volume
and changes in water content will be larger and may have a greater effect on the measured
value. In addition, elution and peeling of the part may occur. Extraction by the immersion
method is recommended.
To obtain a correct measurement result, it is important that the solvent conditions is the same
for calibration and measurement. Observe the precautions below.
Water is not used for extraction of oil content on metal parts.
Use the same lot of solvent for zero calibration and span calibration, which is used for
extraction. Do not use water.
Solvent volatilization during extraction will affect measurement results.
The effect of solvent volatilization can be reduced by performing, in parallel with extraction
from the metal part, the same processing using solvent only, and using that solvent to
perform zero calibration and span calibration. In particular, if an ultrasonic cleaner is used
for extraction, always process the solvent to be used for zero calibration and span
calibration with the ultrasonic cleaner as well.
Extraction
Items required
Measuring cylinder (select a size appropriate for the amount of solvent)
*1
Wide-mouthed glass container with lid (select a size appropriate for the size of the sample
and the amount of solvent)
*1
Ashless cellulose quantitative filter paper (particle retention: 8
m)
*2
Glass funnel
*1
Glass container
*1
Ultrasonic cleaner (if used)
Part to be measured (referred to as sample in the rest of this section)
Clean solvent S-316 (optional)
Note
*1: Clean the glass utensils with solvent in advance and let air dry.
*2: Use solvent to elute and to clean organic material from the filter paper in advance, and let air dry.
Extraction procedure
1.
Place the sample in the wide-mouthed glass container with a lid.
2.
Fill an amount of solvent into the measuring cylinder sufficient to immerse the
entire sample.
3.
Pour the measured solvent into the wide-mouthed container and immediately close
the lid.
4.
Wait with the lid closed, shaking from time to time, for 1 minute. If needed, the time
can be extended. It is possible to apply the sonic cleaner with the lid closed (no
more than 3 minutes).