RETERENCES

Proc€dur. for .mrpiou. rilie d.G.ni..do! by .n.lydet mttod
l) Pr.p.nrior ol rtrd|qbr SolutioB
A 0.005M aqueous glr€ol $ln1ioo oi Ba{OH), is pEp@d frcm a sarurat.d aqu@s
$lulion of B4OHL (the slubiliiy of Aa(OH) in ward !t 30'C is 3.89 B/100 nn), uking
!n appropriare volune aft.r lillration (10.s ml of fil&lt€ w6 E*d lo pr€pd.250 ml of
6olution) dd mixing n wnh e aqu@u6 gllreDl solution in which the wltcr to slycerol
ario *6 l:1. Thc reulting $l on nusr b. porarcd fDm .[@sphdic CO:. An
llcoholic solution of phcnolphtnaLih (covering the pH rege 8-9.) wd used a .h
2) Atuu ofrin Eqole.Ltrr to 5 Dl ofcly..rol
A snl volume of glicerol b m6ur.d n a small beols or a porcelain capsule (using a
st{inge) ..d dowly dhted witn lhe !qu6u $lulior ol gltt@l B.(OH):. horn mixcd
widr a ma8ltetic sri@. Becaue $e high vi$osity of glrml th€ derddon ofthe cnd
poim of th. ibrion musr b. clEied out exrmlty of thc riEalion !@epr.cl.. Ite olor
chage oa $s slution n de|.mircd $ follows: fou dsp6 of the indjobr c ple.d on
! por.ehin plale .nd lou drops of rhc slldon b.ine litratcd addcd to it Deps ae nixed
wnh a gls md md this pmedue h Epsred !ftq each ad.Cnion oftitel. Tilrarion is
supposed to be complet€d when the color of th. solutioo ildicaror oh tn€ porceloin plale
cha.s6lo Dse. The mounl of tiftnt used N, n rlkcn inro lccoDt in subs.quenl
l16