tled hy chloroform. (r(>111strong ... hy burning of crude petroleum, coal and lignite, settle on the soil and affect the ... of 5750±SO lit. mole" ern". The sensitivity.
-: Fe If..T , L 12 E. Jt
T
e (,H NO (.0 6Y UOC •.
A II"lrl Rlld sensitlve rnrtho'"
a hquo
I ()(l
11('l' t
Y) was con-pletely extra-ted by chlol\14-R molar hydrochloric acid medium. Several common ions, such as aluminium (III). bnrium (II), calcium cadmium (If I, cobalt «(I), chromiurn (If I), copper (Jf), iron (III). murcury (If). magnesium (11), manganese (II). till (IV), strontium (II) thorium (IV), ureniurn (VI). zinc (II) acetate, nitrate chloride. chlorate. sulphate, phosphate, ammoniun: and tartr~re did not interfere. Traces of zirconuuu (IV) and 111ol\'hdcnum (VI) also did not Interfere. !l
«(I).
Ihe
11111,~'~'!!~';Il'id
(Ill"
Vnnadiuuu form from
11111111 :,ull,hatc. urea, ammonium phosphate. etc .. used as fcrtilil.er and normally Jl.(""~l1t in soil, do not interfere ill the .lctcrminntiun or V;HI;ldiUJ1l hy this method. The 110rtlwl \':111;1
