Development of Karl Fischer Reagents
Development of Karl Fischer Reagents
Development of Karl Fischer Reagents
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[Characteristics]<br />
[Applications]<br />
Chapter I: Basic Knowledge<br />
a) The moisture content in gases can be captured completely, and there is<br />
minimal vaporization <strong>of</strong> the solvent even when large volumes <strong>of</strong> gas are<br />
passed through it.<br />
b) The reaction between water and the <strong>Karl</strong> <strong>Fischer</strong> reagent occurs rapidly.<br />
c) The end-point can be readily determined and measured over a short<br />
period <strong>of</strong> time.<br />
Inorganic gases (hydrogen, nitrogen, oxygen, argon, helium, etc.)<br />
hydrocarbons (ethylene, acetylene, propylene, propane, butane, etc.)<br />
Vaporization solvent for plastics, minerals, greases, lubricants, etc. Also<br />
excellent for use with inorganic salts, which dissolve readily in this product.<br />
Reference: Muroi, K., Ono, M., Sekiyu Gakkaishi [Journal <strong>of</strong> Japan<br />
Petroleum Society] 11 (No. 6), 440 (1968).<br />
K. Muroi, Bunseki Kagaku 20, 975 (1971).<br />
(2) Dehydrated Solvents used to Prevent Interference Reactions<br />
Aldehydes or ketones that include active carbonyls cause interference<br />
reactions by reacting with methanol to produce water (see Q8). To<br />
prevent such reactions and measure moisture content accurately, it is<br />
necessary to use a dehydrated solvent designed for use with ketones.<br />
The same dehydrated solvent can be used with lower carboxylic acid,<br />
which causes a similar reaction. Reactivity varies according to the<br />
specific substance and users should be aware that there are limitations<br />
on the size <strong>of</strong> the samples that can be measured.<br />
Principal ingredients <strong>of</strong> solvent<br />
Propylene carbonate<br />
Diethylene glycol monoethyl ether<br />
Chlor<strong>of</strong>orm<br />
Propylene carbonate<br />
Pyridine<br />
Ethylene glycol<br />
Pyridine<br />
Propylene glycol<br />
KTX(pyridine-free)<br />
CP<br />
PE<br />
PP<br />
Name Use Packaging<br />
Ketones<br />
Lower carboxylic acid<br />
Ketones<br />
Lower carboxylic acid<br />
Silicone oils<br />
Special-purpose<br />
paints and varnishes<br />
Aldehydes<br />
500ml bottles<br />
500ml bottles<br />
500ml bottles<br />
500ml bottles<br />
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