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In the answer to the query in The Journal, Sept. 25, 1948, page 330, it is stated that the anion exchange resin is still limited to investigational use, whereas it has been available for about a year as resinat.R The term "amberlite IR IV" was used in the answer. The anion exchange resin used in resinatR is a polyamine fomaldehyde resin, sometimes designated as "amberlite XE 58."
Amberlite.r. JAMA. 1948;138(8):603. doi:10.1001/jama.1948.02900080061016