Fisher Scientific Company

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REXYN

We make and stock 121 different kinds of pfi electrodes. We don Ί classify this one among them.

ION EXCHANGE RESINS IN THREE PURITY GRADES

It was developed for a specific problem that never may arise again. If you need a pH electrode that doesn't exist yet, see your Beckman Safes Engineer. Meanwhile we can give immediate delivery on the other 121. Write for our new Electrode Catalog.

There are 40 Fisher Rexyn* ion exchange resins, including organic and inorganic resins in strong and weak acid and base, and mixed acid-base forms. Take your choice of these three purity grades: / . Research Grade Rexyn provides extremely high purity and regen­ eration efficiency required in ultrasensitive analytical technique and research. Maximum metallic impurities: Fe, 0.005%; Cu, 0.0025%; Pb, 0.0025%; Ni, 0.0025%. 2. Chromatographic Grade Rexyn, designed for ion exchange chromatography, is available in two particle sizes (100-200 and 200-400 mesh); gives excellent resolution and sharp, clear separations. Maximum metallic im­ purities: Fe, 0.05%; Cu, 0.005%; Pb, 0.001%; Ni, 0.002%. 3. Analytical Grade Rexyn is economical, ideal for routine analytical use and pilot plant operations. Lot analysis of key chemical and physical properties on each label. For reference chart listing all Rexyn ion exchange resins, write Fisher Scientific Company, 100 Fisher Building, Pittsburgh 19, Pa. J-190 *Fisher Scientific Company Trademark

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