COMMUNICATIOXS TO THE EDITOR
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TABLE I COMPARISON O F P H Y S I C A L P R O P E R T I E S O F C O N V E N T I O N A L AND
Resin
Form
Amberlyst 15 Amberlite IR-120 Amberlyst XN-1001 Amberlite IRA400 a Mercury displacement.
Moisture holding capacity, % HtO
Surface area sq. rneters/g: of dry resin
Na + 50 Na 46 c160 c145 * Helium displacement.
42.5
62.9
