A kind of sampling device and sampling method of Karl Fischer titrator
The technology of a sample feeding device and a titrator is applied in the field of equipment for measuring the moisture of a sample by the Karl Fischer method, which can solve the problems such as the measurement result being lower than the actual value, the accuracy of the measurement result being poor, and the economic cost being increased, so as to prevent moisture from entering, Simple operation and low cost effect
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[0040] Step 1: If figure 1 As shown, under a stable indoor environment with a humidity of 20%, weigh the test sample 4 (pteroyl glutamate), and place the test sample 4 (pteroyl glutamate) on a dry and clean tray 5, Take off the bottle cap 2 of the Karl Fischer titrator reaction bottle, use the sealing film 3 to surround the bottle cap 2 and the tray 5, and make the two stick together to achieve a fixed connection, and then put the reaction bottle cap with the tray and the sample stopper to be tested Put it into the reaction bottle and cover it tightly; start the pre-titration, start the magnetic stirrer 8 to rotate continuously, until the instrument shows that the balance is reached, that is, the water in the bottle has been completely consumed by the reaction;
[0041] Step 2: If figure 2 As shown, the clean and dry metal fine needle 9 punctures the plastic gasket 1 sealed at the upper end of the bottle cap 2 of the reaction bottle, and props against the tray 5 bonded at th...
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