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Coulometric Titration Method Coulometric Karl Fischer for Measuring Very Low Water Content
Coulometric Titration Method Coulometric Karl Fischer for Measuring Very Low Water Content

Coulometric Titration Method Coulometric Karl Fischer for Measuring Very Low Water Content

China Coulometric Titration Method Coulometric Karl Fischer for Measuring Very Low Water Content, Find details about China Coulometric, Coulometric Karl Fischer from Coulometric Titration Method Coulometric Karl Fischer for Measuring Very Low Water Content

Model NO.
GD-2100
Electrolysis Speed
up to 2.4 Mg Water/Min
Electrolytic Current
0 ~ 430 Ma
Ambient Temperature
Recommended Room Temperature ~ 40c
Power
AC 220V+/-10%
Warranty
1 Year
Transport Package
Wooden Case
Origin
Chongqing China
HS Code
9031809090
Model NO.
GD-2100
Electrolysis Speed
up to 2.4 Mg Water/Min
Electrolytic Current
0 ~ 430 Ma
Ambient Temperature
Recommended Room Temperature ~ 40c
Power
AC 220V+/-10%
Warranty
1 Year
Transport Package
Wooden Case
Origin
Chongqing China
HS Code
9031809090
Coulometric Titration Method Coulometric Karl Fischer Titrator for measuring very low water content 



Introduction:
Coulometric Titration Method is for Precise Measurement.
The Coulometric Karl Fischer Titrator is mainly usd for measuring very low water content (less than 2%) in liquid and gaseous samples.


Parameters:

1. Display mode: Chinese and English color LCD display
2. Measurement range: 3 micrograms of water to 200 milligrams of water. Water content range: 1 ppm to 100%
3. Resolution: 0.01 micrograms of water
4. Electrolysis speed: up to 2.4 mg water/min
5. Electrolytic current: 0 ~ 430 mA
6. Ambient temperature: Recommended room temperature ~ 40 °C Ambient humidity: ≤ 85%
7. Power: AC 220V ± 10%.


Working Principle:

The measuring principle used in this instrument is the Karl-Fischer Coulomb method. The principle is based on the fact that when water is present, iodine is reduced by sulphur dioxide, and in the presence of pyridine and methanol, pyridine iodine and methyl pyridine thioate are formed. The reaction formula is:
I2+SO2+3C5H5N+H20→2C5H5N·HI+C5H5N·SO3 ......................(1)
C5H5N·SO3+CH3OH→C5H5N·HSO4CH3 ....................................(2)
During the electrolysis process, the electrode reaction is as follows:
Anode: 2I--2e→I2 .......................................................................(3)
Cathode: 2H++2e→H2↑.............................................................(4)
The reagent solution used is a mixture of predominant iodine and pyridine-doped pyridine, methanol, etc., and iodine is formed on the anode by electrolysis, and iodine is reacted with water to form hydroiodic acid until all the water has been reacted. The end of the reaction was detected with a platinum electrode.
According to Faraday's law, the formula for calculating the moisture content in the sample is obtained:
.....................................................................................................(5)
Where: W - moisture content in the sample, in micrograms
      Q--Electrolysis power, unit: millicoulomb
Calculated by the instrument, the moisture content of the tested sample is directly displayed on the display. The instrument uses an electrolysis current automatic control system. The size of the electrolysis current can be determined according to the moisture content of the sample, up to 430 mA.
This instrument uses Karl Fischer (Coulomb method) reagent


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Coulometric Titration Method Coulometric Karl Fischer for Measuring Very Low Water Content

 

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