ELECTRO-CHROMATOGRAPHY.
Y.
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Discussion
In Table I the migration of the ions towards the anode is shown by a + sign, the starting by the symbol: and the migration towards the cathode is indicated by asign. The ions within the brackets show that they have a slight common migration zone although they arc well detected individually.
In general the migration of the ions of the third group is considerably low and all the ions move towards the anode in presence of NaK tartrate and Na citrate.
Ferric ion shows two bands with electrolytes such as H,SO,, CH,CO,H, Na citrate, NH,CNS, and is mostly cationic. Because of the anionic character of aluminium in alkali it is possible to separate it from all the other ions present in a mixture. Beryllium ion shows a faster rate of movement, less degree of complex formation, and in a few instances abnormal spreading of the zone.
Of the other members of this group, Ti+4, Zr+4, Th-fl and UOa+2, the first three show practically the same behaviour in having slower movement, while uranium in the anionic form exhibits considerable movement in presence of ammonium hydroxide and ammonium carbonate. SURIMARY The lontc migrntlon and migration scqucnces of the Ions of group III, Fc+=, Cr+s, Al+=, I%+*, n+*, Zti, Th+*, UO,,+l, have been detcrmmcd m a numhcr of common clcctrolytcs. Owing to thclr slmdar hchavlour towards ionic migration, hcs~dcs scparntlons from their binary and ternary mixturcu, only a few scprations from quatcrnnry mlxturcs as Zr-Th-U-B,