Metrohm 917 Coulometer (Coulometric method)
Metrohm 917 Coulometer (Coulometric method) with 885 Autosampling Oven
The coulometric method generates iodine electrochemically during the titration process. In this case the amount of iodine generated is directly proportional to the charge passed to the solution. This method has much finer control of iodine delivery and thus can measure water content of samples all down to ppm level. The 885 oven is used to draw water from solid samples, high boiling point liquids or samples where the water is difficult to extract via traditional dissolution in the solvent (methanol).