公开(公告)号：US3702821A

公开(公告)日：1972-11-14

申请号：US3702821D

申请日：1970-12-14

Applicant: BIO CHEM PROCEDURES INC

Inventor： FERNANDEZ ALBERTO ANTONIO

IPC: B01J41/04 ,  B01J47/00 ,  G01N33/78 ,  B01J1/08

CPC classification number: G01N33/78 ,  B01J41/05 ,  B01J47/016 ,  Y10T436/106664 ,  Y10T436/25375

Abstract: BY PRETREATMENT OF A STRONG BASE QUATERNARY AMMONIUM ANION EXCHANGE RESIN WITH AN AQUEOUS SOLUTION OF A CHELATING AGENT, MORE EFFICIENT ELUTION OF THYROXINE THEREFROM IN BIOLOGICAL ISOLATION AND ANALYTICAL PROCEDURES IS ACHIEVED. A FURTHER IMPROVEMENT IS ACHIEVED BY PRETREATMENT OF THE RESIN WITH NITRIC ACID.