polarografi
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7/21/2019 POLAROGRAFI
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POLAROGRAFI
KELOMPOK 10 :1. Septiani Yuni R
2. Aris Wijayanti
3. Lia Inarotut .!. A"i "itriyanin#si$
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OPo%aro#ra"i a&a%a$ 'eto&e ana%isis yan#
&i&asar(an pa&a (ur)a arus te#an#an
yan# &ipero%e$ se*ara e%e*tro%isis. Rea(si
yan# terja&i pa&a 'eto&e ini a&a%a$ rea(si
re&o(s teruta'a rea(si re&u(si. +ntu(
'en#ana%isis ion,ion %o#a' &an senya-aor#ani(.
PE/ERIA
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Se'ua e%e(tro&a &i*e%up(an (e &a%a' %arutanyan# &iana%isis.
/as nitro#en er"un#si untu( 'en#usir #as
yan# ter%arut (arena #as terseut &apat
&ire&u(si.
O
Prinsip Po%aro#ra"i
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Pere&u(sian terja&i &a%a' 2 ta$ap 2e
2e 2O
Rea(si re&u(si terja&i pa&a per'u(aan air ra(sa. ne 4# M54#6
Se%a'a rea(si re&u(si er%an#sun# arus a(an
'en#a%ir &an ju'%a$nya &apat tera'ati 57A6
O
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OInstru'en untu( po%aro#ra"i ter&iri &ari a#ian
se% po%aro#ra"i 5se% e%e(tro%isis6 &an pen*atat
po%aro#ra'.
OSe% po%aro#ra"i ter&iri &ari e%e(tro&a (a%o'e%
5S8E6 &an e%e(tro&a tetes air ra(sa 5ME6
Po%aro#ra"
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O4asi% pen#u(uran
po%aro#ra"i'en#$asi%(an (ur)a
yan# 'enyata(an
$uun#an antara arus
59A6 &an potensia% 56
Potensia% pen#uraian
Po%aro#ra'
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O4ar#a E1;2 ter#antun#
pa&a jenis <at yan#&ire&u(si se$in##a $ar#a
ini 'enja&i &asar untu(
ana%isis (ua%itati".
O4ar#a arus &i"usi 5i&6
ter#antun# pa&a
(onsentrasi <at yan#
&ire&u(si se$in##a $ar#aini 'enja&i &asar ana%isis
(uantitati".
Aspe(
(ua%itati"&an
Kuantitati"
Po%aro#ra"i
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ipen#aru$i o%e$ eerapa "a(tor yaitu:
OKe*epatan 'en#a%ir 4# 5'#;&eti(6 &isi'o%(an
&en#an '
OWa(tu yan# &iper%u(an untu( setiap tetesan= t
5&eti(6
OKonsentrasi= 8 5'o%;L6
4uun#an antara arus &i"usi &an "a(tor,"a(torterseut &i(ena% sea#ai persa'aan I%%(o)i*:
Id = 607 nD1/2m2/3 t1/6 C
• Arus &i"usi
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OMer*ury E%e(tro&a
E%e(tro&a 'er(uri 'erupa(an e%e(tro&a (erja
&a%a' siste' po%aro#ra"i= &isa'pin# 2 e%e(tro&a
yan# %ain yaitu e%e(tro&a pe'an&in# 5A#;A#
8e atau (a%o'e% jenu$6 &an e%e(tro&a pe'antu5Au>ia%%ary e%e(tro&a6 5Pt atau Au6.
Instrumentasi Polarora!i
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OPotensiostat
Potensiostat'erupa(an a#ian
instru'ent yan#
ter&iri &ari ran#(aian
%istri( yan# er#unauntu( 'enja#a
potensia% &an
'en#atur potensia%
tetap pa&a ni%ai
tertentu
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OA%at pe'a*a 5Rea&out6
Pa&a prinsipnya po%aro#ra"i a&a%a$ 'en#u(ur
arus yan# (e%uar a(iat pe'erian potensia%
tertentu.
A%at u(ur yan# pa%in# se&er$ana a&a%a$'i(roa'per'eter. Pa&a per(e'an#annya
pe'a*aan arus se*ara &i#ita% &en#an (o'puter.
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O+ntu( ana%isis eerapa jenis senya-a or#ani(
seperti strepto'i*in= (%ora'"eni*o%=
&eri)atsu%"ani%a'i&= &an era#ai jenis )ita'in.
OSenya-a,senya-a or#ani( yan# 'e'punyai
#u#us "un#si yan# &apat erea(si re&u(si &en#an
e%e(tro&a tetes 'er(uri.OSea#ian esar (ation.
"an!aat "etode Polarora!i
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