Ppt
Dissolve in dit HCL, add oxalic
acid and then neutralize with
NH,OH using bromcresol green as
the indicator. Repeat the pptn.
¥
.
Ppt
¥
Fit
ms
(Ce, Sr and Ca)
Ash and dissolve in
Add tartaric acid,render
soln. of HNO, contain-
ing H05. Add NH)Cl
and NH, OH.
Y
Pot
Filt
alkaline with are
satulate with Hoo.
¥
Ppt
dil HNOQ3 containing
4
a6 di ty to applixi-
Ppt
NH,OH, then add
Fe
mately pil; by adding
Filt
Acidify by adding
HCOOH and satulate
with Hos. Repeat
|
Filt
the pptn.
thrite and weigh as
total rare earth oxides
¥
Filt
Add oxalic acid to ppt.
Ca and Sr, filter and
ash the pptn. Dissolve
the oxides in HNO3
evaporate to dryness,
dissolve ir water, add
fuming HNO3 (final HNO;
SG 1.45). "Dissolve
the pptn. in water, add
NaglrQ), to remove Ba and
Ha, add fuming HNO3 to
the filt.
Ppt
Y
Filt
nadHH,08. Repeat the pptn.
HO . Reduce the
Ppt
-
180, an in a mixture of
and HNO 5 add NH, CL
Dissolve in soln. of
exalicacid.
(Zn, Co, Fe)
¥
Filt
Heat to dryness and
weigh as Sr (NO3)2.
¥
Ppt
Filt
Ignite and
weigh as
2nO
Boil to expel
HoS, oxidize CO |
by adding Br.
water, add
@ -nitroso-~ B
naphtole.
Ppt
Filt
Tenite and weigh
as Gon0).