literature review

D.tmi.alion oft_e cl.m.ntt (Cr, r, F., Ma Co) in iDnd nilk bv aromic $so.ption
sp*romdry, ndhn a.tivarion f.ly!i5 ud ooEr n tho& b rcponed bv Robefi M 6 al. (16).
A conD{ien bd*d th. daily int }6 of bebi6 .nd th. Motlv a4cept d Rame'dcd
Di.u'y Atlowde (RDA) w shoM giving rh.h th. alpsa@ of belrd tutritio"l qulirv
Khatee6thullan .t d (rD .€pon.d rh. impondc. of zitc and ciromiufr in SroDnd war"
aeailable in tbe wells ofPannal bv rlonic aberption sp€drcnetry' ln dnnking v4!'c nac'
mdal zinc vri€d fton O 02 to O 2 ppt\ while ioxic chronium obtai.ed froh 0 29 to r 65 pPn
Yusuf er al. (18) have reported lhe el€ncnk i. hufta. healtb and .uiririon bv.tomic
absorpiion spefio.elry Nomal requhement of lh. .s*ntial a.d ftce selals (Cr, Fe, Co Cu,
Ni, Mo, fld Zn) has n€ntioned.
Usiog a mielld media i.c.
r.Pon€d th. ddmina,lion of t.c
lpehphoromefy. The nethod is
tp.crophorometic detmin.tion
su.Acbq ediun dodcyl slphate gmif ei al (r9)
s dirhi2on. @mtlcx by flow inj6tio. an lysh wnh
rcpor|d to havc rvml ad@lags ov.r the noml
(nuhawe et ,r 00) h.v. r.pon.d rh. sg.crrcphoron.tric detedinarion 6f copp.t(tr)
sd nickel(Il) 6 coftplex.s vnh tetad€ntar€ schiffbs. by solv€ eatradion ndhod
Hdif et al (2r) r€poned rhe niccllar ud mioro€nuhiot systems as singl+Phde
extractiod nedia aor lhe detemiiatioi of zinc. Th. surfadant SDS md cosurfaclanl ethdol wa
SD€lrcDhotonet.ic dd.min{io. of sir dithioctbdate @dplex6 at lrg ld.l by
co.vding tb.n in to s.leriln dithiocarblm.t. compl.rcs md $lvdt qtradioi n.ihod it
E9od.d by Ashok er al (22)
Anw& , .t al. (23) cponcd th. dcicmimtion of zitc by tlohjc aberyioi Ad.ospy
$ing mix.d slmt rst€h.
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