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Karl Fischer Moisture Titrator
Volumetric method
ASTM E203 Standard Test Method for Water Using Volumetric Karl Fischer Titration

The sample, containing a maximum of 100 mg of water, is dissolved or dispersed in a suitable liquid and titrated with KF reagent, which consists of iodine, sulfur dioxide, organic base, and a solvent (typically an alcohol, such as methanol, ethylene glycol, or 2-methoxyethanol). The titration end point is determined amperometrically with a platinum electrode which senses a sharp change in cell resistance when the iodine is reduced by sulfur dioxide in the presence of water.

ISO 760 Determination of water -- Karl Fischer method (General method)
MKV-710B MKV-710S MKV-710M
Measuring method : Volumetric method
Measuring range : 0.1mg ~ 500mgH2O,10 ppm ~ 100% H2O
Burette volume: 10mL 
Discharge precision: ± 0.015mL 

Coulometric method
ASTM E1064 Standard Test Method for Water in Organic by Coulometric Karl Fischer Titration 

This test method is based on the Karl Fischer reaction for determining water-the reduction of iodine by sulfur dioxide in the presence of water to form sulfur trioxide and hydriodic acid. The reaction becomes quantitative only when pyridine or other organic base and methanol or other alcohol are present. Unlike the volumetric Karl Fischer reagents that include iodine, the coulometric technique electrolytically generates iodine, with 10.71 C of generating current corresponding to 1 mg of water in accordance with Faraday’s law.

MKC-710B MKC-710S MKC-710M
Measuring method : Coulometric method
Measuring range :  10g ~ 300mg
Sensitivity : 0.1g  
Precision : RSD < 0.3%(n=10)

Evaporator
ASTM D6869 Standard Test Method for Coulometric and Volumetric Determination of Moisture in Plastics Using the Karl Fischer Reaction (the Reaction of Iodine with Water)

Samples are heated to vaporize water that is transported by a nitrogen carrier gas to the titration cell. The moisture collected in the solution within the titration cell is determined using the reaction of water with I2.

Endpoint detection is made by instrumented methods. Determination of the moisture present is made using the reaction of I2 with water.

Coulometric instruments use Faraday’s law to measure the moisture present with 10.71 Coulombs (C) of generating current corresponding to 1 mg of water (2I- I2 + 2e-). Volumetric instruments measure the volume of solution containing I2 that is required to keep the current constant.

ISO 15512 Plastics -- Determination of water content
 
ADP-611 CHK-501  
 Evaporator Multiple Sample Changer  

Options

 
ADP-344 ADP-513  
Heat Extractor for Sugar Samples Evaporator for Oil Samples  
     
 
 ADP-512  ADP-512S  
Evaporator for Ores Evaporator for Ores  

Software
KF-Win/ER Tview6 SOFT-CAP
Software for Titrators Analysis Software for Titration Results Data Capture Software


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