•9°S-] 



HALL AND SMITH— COLUMBIUM. 



193 



sent themselves which would lead to a quantitative separation of 

 these two elements. 



Reagent. 



1. Mono-methylamine, 



2. Di-methylamine, 



3. Tri-methylamine, 



4. Tetra-methylamine, 



5. Mono-ethylamine, 



6. Di-ethylamine, 



7. Tri-ethylamine, 



8. Di-propylamine, 



9. Amylamine, 



10. Iso-butylamine, 



11. Allylamine, 



12. Ethylenediamine, 



13. Propylenediamine, 



14. Butylenediamine (secondary), 



15. Butylenediamine (normal) 



16. Hexylamine, 



17. Benzylamine, 



18. Benzylmethylamine, 



19. Piperidine, 



20. Camphylamine, 



21. Di-benzylamine, 



22. Pyridine, 



23. Di-isobutylamine, 



24. Tri-propylamine, 



25. Di-amylamine, 



26. Heptylamine, 



27. Toluylenediamine (meta), 



28. Picoline, 



29. Tri-isobutylamine, 



30. Bornylamine, 



31. Aniline, 



32. Toluidine (m), 



^^. Mono-methylaniline, 



34. Mono-ethylaniline, 



35. Isoquinoline, 



36. Quinoline, 



Solution of K 2 TiF 6 . Solution of K„CbOF 5 . 

 Precipit. complete, Precipit. soluble excess. 



" by large excess. 



insoluble excess. 



dif. soluble in water. 



" soluble excess. 



slightly soluble excess. 

 Precipit. complete. 



