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CA-200
5-5. Sampling
5-5-1. Liquid sample sampling
Use the following samplers for liquid samples. Dry them well before use.
Liquid sample
Viscous liquid sample
Liquefied gas
(1) For a lock-type syringe
1. Wash with a sample.
Take a little sample into a syringe with a needle. Push the syringe plunger to wet the inner wall
of a syringe with the sample and discharge the sample. Repeat this operation once or twice if
necessary.
2. Take the sample and weigh "W".
After collecting a required volume of the sample, set a silicone rubber chip to the needle end
to avoid sample leakage and moisture absorption and weigh sample + tare "W".
3. Inject the sample.
Inject the sample by sticking the needle to the rubber packing of a sample injection plug.
Insert the needle end possibly near the liquid level to avoid sample attachment to a titration
flask wall and electrodes.
4. Weigh "w".
Weigh tare "w" with the silicone rubber chip.
(2) For a dropper bottle and a syringe-type sampler
1. Wash a sampler with a sample.
Take a little sample and discharge it. Repeat this operation once or twice if necessary.
2. Take the sample and weigh "W".
After taking a required volume of the sample, wipe off the sample on the intake end.
Weigh sample inserted in a receiver or a cap + tare "W".
Take care of the sample adhesion to the receiver or the cap.
3. Inject the sample.
Remove the sealing plug or the sample injection plug on the top of a titration flask,
and inject the sample so that the sample does not touch other parts.
Insert a sealing plug or a sample injection plug immediately.
4. Weigh "w".
Set the receiver and weigh "w".
: Lock-type syringe
: Dropper bottle, Syringe-type sampler (1.5ml, 3ml, 5ml, 6ml)
Sealing plug with a spoon
: Liquefied gas sampler
5-17
Section 5: Moisture Measurement Mode
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