Get the latest updates from us for free
Mobile Apps Whatsapp



Calibration of Karl Fisher Apparatus


Learn how to calibrate the Karl Fisher Apparatus using Disodium Tartrate (Standard value = 15.66 %).

CALIBRATION PROCEDURE

1.  Switch on the main switch and switch on the instrument as per the operating procedure.
2.  Reset the instrument and then press “MODE” key so the red light will glow on “CONC” position.  
3.  Press “RUN” key to neutralize the methanol and the red light will glow on “READY” position. Once again press “RUN” key so red light will glow on “WEIGHT” position.
4.  Weigh accurately about 0.005 to 0.05 gm (5 to 50 ml) of water with the syringe and enter the weight in gram.  
5.  Press the “RUN” key so that red light will glow on “BUSY” position. Again press the “RUN” key so titration will starts.
6.  At the end of the titration display will show result in mg of H2O / 5 ml of KF reagent.
7.  Repeat the same procedure by resetting the instrument to obtain 3 values for the factor of KF reagent which is not differing by 0.3 %.       
8.  Calculate the mean of all 3 values and to enter it in memory, Press “RESET” key then “MODE” key once to glow red light on “CONC” position. Enter the value and again press “CONC”.
9.  Reset the instrument and red light will glow on “WEIGH” position.
10.  Weigh accurately about 0.05 gm to 0.15 gm of “Disodium tartrate” and enter the weigh in gm. 11.  Press “RUN” key and enter stir time in seconds if required.
12.  Again press “RUN” key so red light will glow on “BUSY” mode and by pressing once again “RUN” key titration can be started.
13.  At the end of the titration display will show result in % of water content
14.  Repeat the same procedure by resetting the instrument to obtain 3 values of water content having not more than + 0.3 % deviation of standard water content of Disodium tartrate (Standard value = 15.66 %) and record the result in calibration log.
15.  Affix the calibration label on the instrument.
16.  Drain off the titration vessel and dip the electrode in methanol, switch off the  instrument switch off the mains.



                                                           CALIBRATION LOG

Instrument : ____________                                            Code No. : ___________
Make : ____________                                                    Model : ___________

Determination of Kf reagent factor.
 
Sr. No.
Weight of Water (In gm)
Factor of KF reagent  
(In mg H2O/5 ml)
Mean factor of KF reagent 
(In mg H2O/5 ml)
Remark
1.
2.
3.

Determination of water content of Di-Sodium Tartrate (15.66% ± 0.3 %)


Sr. No.
Wt. of DiSod. Tartrate (In gm)
Water of DiSod. Tartrate (In % )
Mean Water of DiSod. Tartrate (In % )
Remark
1.
2.
3.
Calibration Status          :  Satisfactory / Not Satisfactory
Next Calibration Due     :
Calibrated By :                                                                                                  Checked By :



Ads by Yahoo!

Write Your Valuable Comment Below ...

Post a Comment