Principle and applications of the oven method The oven method is suitable for samples that release their water only at high temperatures, are difficult to dissolve or react with the KF reagent.
The substance to be analyzed is hermetically closed, placed on the sample rack and heated in the oven. A double hollow needle pierces the septum and a dry stream of carrier gas transports the released water to the titration cell.
The advantages of the oven method is that the sample itself does not get in contact with the KF reagent. This prevents contamination of the oven and titration cell; carryover and memory effects that could distort the results of the analysis are ruled out. Small footprint The name of the 885 Compact Oven Sample Changer says it all: the instrument provides automation in a very small space. Great flexibility Depending on the sample, Karl Fischer titration can be done coulometrically or volumetrically. In both cases, the 885 Compact Oven Sample Changer can be operated with all stand-alone Karl Fischer titrators with sample data silo. Easy to use The 885 Compact Oven Sample Changer is controlled by way of the integral keypad. Only the oven temperature and the gas flow need to be defined and the number of test samples set. Reusable sample vials Screw cap vials are used with the 885 Compact Oven Sample Changer. After measuring, this type of sample vial can be opened and cleaned without any problem and then reused. Only the pierced septum needs to be replaced. |
