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Section 6: Function
6-7-2. Measurement validation
The methods for checking that moisture measured values are correct are as follows.
(1) With AQUAMICRON
For 1.0mgH
O/m, Values of 3 times measurement should be within ±3% of the guaranteed values.
2
For 0.2 mgH
O/m, Values should be within ±5% of the guaranteed values.
2
(2) With water (Example: 5 μl sampling with a microsyringe)
The most recommended method including absolute amount check
(3) With AQUAMICRON
The values of 3 times measurement should be within ±5%.
(4) With sodium tartrate dehydrate (Theoretical moisture amount15.65%), tungsten sodium dehydrate
(Theoretical moisture amount 10.92%) (Example: 20 to 40mg sampling by a sampler for high
concentration.)
The method is applied at water vaporizer use and carrier gas leak also can be checked.
Check moisture content in a drying process before the use.
POINT
Use distilled water or refined water by the ion exchange method or by the combination of
the reverse osmosis method or the distillation method or the ion exchange method.
(5) Measurement validation
In case of CA-200 validation by water
Use water and a calibrated microsyringe. We recommend 5μl (5000μg) water.
Ⓡ
water standard solution (0.2, 1.0mgH
Ⓡ
solid water standard solution (3.83±0.05%)
O/ml)
2
6-22
CA-200
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