Development of Karl Fischer Reagents

I-1. Questions & Answers about Karl Fischer Reagents
(1) Mitsubishi Dehydrated Solvents for Use in Dissolving Specimens
A commonly used titration solvent is methanol, which has a large polarity
and considerable capacity to extract water. However, a titration solvent
to which other solvents have been added is desirable for substances
that do not readily dissolve in methanol. Mitsubishi Chemical offers a
range of blended solvents to suit user requirements. Please choose the
type that is suitable for the characteristics of the sample. With some
exceptions, most of the products are blended at 0.2mg/ml or lower.
Principal ingredients Name Use Packaging
Methanol
GEX (pyridine-free)
MS
ML
General samples 500ml bottles
Methanol
OL II (pyridine-free) Petroleum products 500ml bottles
Chloroform CM
Oils and fats
Methanol
SU (pyridine-free) Sugars, proteins 500ml bottles
Formamide FM
Food additives
Methanol
ME
Gases
500ml bottles
Ethylene glycol
Inorganic salts
Dehydrated Solvents GEX and MS
The solvent most commonly used to extract water from samples is methanol.
The main ingredients of Dehydrated Solvents GEX and MS is methanol that
has been thoroughly dehydrated. In general, these products can be used
immediately to measure moisture content. In addition, a reaction accelerator
has been added to make the reaction between Karl Fischer reagent and
water occur more rapidly than with ordinary methanol. This allows
measurements to be taken quickly and with a clear titration end-point.
[Uses]
Organic solvents (n-heptane, cyclohexane, xylene, toluene, benzene, ethyl
acetate, N,N-dimethylformamide, etc.), inorganic chemicals, pesticides,
pharmaceutical products, fertilizers, synthetic detergents, refrigerants,
foodstuffs, etc.
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