Why only Water & Sodium Tatrate Is Use For THe Calibration
Of Karl Fischer Titrator?
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Answer Posted / kissu
DST is primary standard and it is stable up to 150 degree
Centigrade. It release free water molecules easily when
reacts with KF reagent.DST is easily soluble in methanol.
This DST has 15.66% water molecules so we can easily
calculate and standardize the KF reagent. We use the factor
of DST the compound which has less than 1% of moisture.
Water i.e 100% water molecules. But we must use 100% pure
water there should absent dissolved salts and anymore. This
method is not 100% accurate like DST. So generally We use
the factor of water for the compound which has more than 1%
of moisture.1water molecule approximately equal to 5mg of KFR.
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