Moisture

Karl Fischer » Volumetric Titrators

Volumetric Karl Fischer

The Karl Fischer Volumetric Titration Cell is a closed container. The container holds a charge of appropriate solvent.

The sample is add through an airtight port.  Reagent is added using an automated buret until an end-point is reached.

Volumetric Karl Fischer  Schematic

The amount of reagent needed is a measure of the moisture in the sample

Volumetric Titrators

 Volumetric Karl Fischer Moisture Titrator

Karl Fischer Moisture Analysis uses two techniques. For very small amounts of moisture, the Coulometric Technique is preferred.Karl Fischer Label When moisture content gets above the 1% to 2% range the Volumetric Technique is warranted.

The basis of the Karl Fischer technique is a reaction between iodine and water. This reaction changes the the conductivity of a sample containing water to a different level after the Karl Fischer reaction. This change is conductivity determines the end point of the reaction.

With this volumetric technique a solvent is placed in a sealed container or titration cell , that includes an electrode, a sample port, a port for the introduction of Karl Fischer Reagent and a stirrer. Check the left column for a schematic of a typical system..

The testing procedure starts with the introduction of the sample which is dissolved in a solvent contained in the titration cell. This changes the electrical conductivity of the solvent/sample mix.

Through the useAutomatic Volumetric Buret of an automatic buret, reagent is added and reacts with the water to return the conductivity to the starting point. The amount of water/moisture in the sample is calculated based on the amount of reagent need to reach this point.

We offer the Hanna 903 Karl Fischer Volumetric Karl fischer Titrator

Titrator for this process. This instrument conducts the test automatically. It has a range of moisture content from 100 parts per million to 100%.

 

In addition to an on-board display, USB connectivity permits direct input from an electronic balance and results transfer to a computer.

Detailed specifications of the Hanna 903 are available in the Volumetric Karl Fischer section of the CSC On-Line Store.Click on the button.

 

Volumetric Karl Fischer Department  


Follow CSC Scientific

Live Help

Chat with an Expert
( by LivePerson )

Our staff is trained to help solve your testing problems. We can give you complete counsel on the most effective and economical solution to your testing problems.

Get a List Of Reagents.

There are an number of Karl Fischer reagents. For a list of available combinations check our online store.


CSC Scientific Company, Inc
2799-C Merrilee Drive
Fairfax VA, 22031
800-621-4778
703-280-5142 (fax)
csc@cscscientific.com

No part of this page or any other page in this site may be copied or reproduced in any way.