Development of Karl Fischer Reagents
Development of Karl Fischer Reagents
Development of Karl Fischer Reagents
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[Examples <strong>of</strong> Measurement]<br />
(1) Moisture vaporization - Coulometric titration<br />
<strong>Reagents</strong> used: Aquamicron AX (or AS) 150ml<br />
Aquamicron CXU 10ml<br />
Substance<br />
Heating Temperature<br />
( � C)<br />
Sample Quantity<br />
(g)<br />
Chapter III: Applications - 2<br />
Measurement Value<br />
(µg)<br />
Moisture Content<br />
(ppm)<br />
Polyethylene 180 3.7702 67 18<br />
Cross-linked polyethylene 180 1.2786 145 113<br />
Polypropylene 160 2.3185 97 42<br />
Vinyl chloride 130 0.9815 412 420<br />
Vinyl acetate 130 1.5925 1549 973<br />
Ethylene vinyl acetate copolymer 180 0.4743 1005 0.212%<br />
Polyvinyl alcohol 150 0.1392 3739 269<br />
Polyvinyl butyral 180 0.5641 1486 0.263%<br />
Polystyrene 180 2.7896 965 345<br />
Styrol foam 130 0.2892 218 753<br />
Polyester 230 2.4615 512 208<br />
PET 230 4.6003 171 37<br />
PBT 250 1.2020 223 186<br />
Polycarbonate 250 1.0830 972 898<br />
Polyacetal 200 1.5227 2181 0.143%<br />
Phenol resins 200 0.1142 5227 4.58%<br />
6-Nylon 230 0.2211 3007 1.36%<br />
6,6-Nylon 250 0.0492 1200 2.44%<br />
Metacrylic resins 250 1.6017 1337 835<br />
ABS resins 200 0.8455 2073 0.245%<br />
Urea resins 110 0.4898 3587 0.732%<br />
Fluorine resins 160 2.4470 18 7<br />
Epoxy resins 120 0.4142 2360 0.570%<br />
Polyol 150 1.0286 1258 0.122%<br />
Urethane 180 1.4886 3136 0.211%<br />
149
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