Development of Karl Fischer Reagents

Chapter III: Applications - 2
(4) Close valve A and the valve on the canister. Remove the hose. Weigh
the sampling bottle, and then attach a syringe needle to valve B (Figure
21).
Figure 21: Sampling bottle and hose Figure 22:Obtaining a sample from a
gas canister
Titration Method
Syringe needle
Coulometric titration (or volumetric titration) is carried out as follows.
(1) First place 150ml of anolyte (or 100ml of general-use dehydrated
solvent) in an electrolytic cell and use coulometric titration (or Karl
Fischer Reagent SS-X) to remove all moisture.
(2) Introduce the syringe needle through the side port of the electrolytic cell
(or titration flask) until it reaches the bottom of the cell (or titration flask),
as shown in Figure 23.
Aquamicron CXU
Extension pipe
Electrolytic cell
Gas vent
Figure 23: Injecting the sample (coulometric titration)
Aquamicron AX
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