Principle:-
It is colomatric titration or Volumetric titration it is use in determination of
water Content
Factor:- factor
limit 4 – 6
Calculation(F) =
Water in mg /Kf Reagent ml
Monthly
Calibration: Di-sodium tart rate
Calculation =
Br X F X 100/1000 X weaight of DST
Limit
moisture:- 15.5 – 16.5 % w/w
Limit
of RSD:- NMT 1%
Apparatus
:- Karl Fischer Volumetric titrator, consisting of a titration cell, dual
platinum electrode, magnetic stirrer, dispensing buret and control unit. Many
manufacturers of general purpose laboratory titrators offer optional
accessories that allow their instrument to perform KF titrations
Reagents:-
I +
so2 + pyridine Or Imidazol
(Material
Safety Data Sheets (MSDS) for detailed information concerning toxicity, first
aid procedures, and safety precautions for chemicals used in this test
procedure.)
all
reagents shall conform to the specifications of the Committee on Analytical
Reagents of the American Chemical Society
such
specifications are available. Other grades may be used, provided it is first
ascertained that the reagent is of sufficiently high purity to permit its use
without lessening the accuracy of the determination.
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