80 Qualitative Tests. 
URANIUM, U. 
WITH .THE BLOWPIPE. 
With Borax.—O. F. Yellow hot, colorless cold; can 
be flamed enamel-yellow. 
R. F. Bottle-green; can be flamed black, but not 
enamelled. 
With S. Ph.—O. F. Yellow hot, yellowish green 
cold. 
R. F. Emerald-green. 
Interfering Elements. 
Tron.—With 8S. Ph. in R. F. is green hot, red cold. 
IN THE WET WAY. 
1. NH:OH, KOH, and NaOH produce a yellow 
precipitate of uranic hydroxide and alkali. 
2. KsFeCsNs produces a reddish-brown precipi- 
tate. 
Confirm.—By blowpipe test. 
VANADIUM, V. 
WITH THE BLOWPIPE. 
With Borax.—O. F. Colorless or yellow hot, green- 
ish-yellow cold. 
R. F. Brownish hot, emerald-green cold. 
With S. Ph.—O. F. Dark yellow hot, light yellow 
cold. 
R. F. Brownish hot, emerald-green cold. 
IN THE WET WAY. 
1. KsFeCsNcs produces a green flocculent precipi- 
tate, insoluble in acids. 
2. Dissolved in H:SO« and Zn added the solution 
becomes successively green, blue, bluish violet, and lav- 
ender. 
4S ea cal a Fe 
