Karl Fischer titration is simply a means to measure water content of samples. Modern instruments, such as the Aquamax KF, use the coulometric principle, whereby th
e water present in the sample is coulometrically titrated to a predefined end point at which there is a minute excess of free iodine present. Stoichiometrically, 1 mole of water will react with 1 mole of iodine, so that 1 milligram of water is equivalent to 10.71 coulombs of electricity.
Combining the coulometric technique with Karl Fischer titration, Aquamax KF titrators determine the water content of the sample by measuring the amount of electrolysis current necessary to produce the required iodine. This is an absolute technique which does not require calibration of the reagents. Using the latest pulse current technology and our patented “ACE” control system, (Patent No.GB2370641), the Aquamax KF automatically selects the appropriate titration speed dependent upon the amount of water present in the sample. The titration speed is reduced as the end point is approached, and when the titration is completed the instrument prints out and displays the results.
Titration Method: Coulometric Karl Fischer titration
Electrolysis Control: Patented “ACE” control system GB2370641
Titration vessel: Low Drift Cell design, no grease or PTFE sleeves required
End Point detection: AC polarisation
End point indication: Visual display/print out/acoustic beep
Measuring range: Possible: 1µg – 200 mg water. Typical: 1µg – 10mg water
Moisture range: 1ppm – 100% water
Max. sensitivity: 0.1µg
Max. titration speed: 2.24 mg per minute
Max. current: 400 ma
Drift compensation: Automatically controlled
Precision: 10-100µg ± 3µg, 100µg-1mg ±3µg, above 1mg ±0.3%
Start delay time: 0-30 minutes, user selectable
End delay time: 0-30 minutes, user selectable
Calculation modes: Weight/weight, (W/w) (user programmable) Weight/dilution ratio, (W/K) Volume/density, (V/SG) Volume/volume, (V/v)
Display format: µg, mg/kg, ppm, %
Print format: µg, mg/kg, ppm, %
Statistics: max, mean, min values up to 99 runs
Method storage: 10 user programmable methods stored plus multi method via pc link
Sample ID number: User programmable
Stirrer speed: Microprocessor controlled
Languages: Multi languages – user selectable
Calendar/clock: Analysis time & date print out
Battery low indicator: Display & print out indication
Data outputs: USB and RS232 ports Removable Data storage: Flash drive (memory stick)
Removable Data storage: Flash drive (memory stick)
Data Entry: 15 key touchpad
Display: 40 character alphanumeric backlit LCD
Printer: 42 character high speed thermal printer
Power supply: 90-264V AC, 47-63 Hz. 12V DC car adapter/internal battery
Dimensions: 250 x 245 x 120 mm
Weight: 3.5 kg