Pengaruh Komposisi Membran Berbasis PVC dan Ion Pengganggu Zn(II), Cd(II) dan Pb(II) Terhadap Kinerja Elektroda Selektif Ion (ESI)-Hg(II) Menggunakan Ionofor DBA218C6
ABSTRACT: The effect of PVC
(Polyvinylchloride)-Based Membrane Composition to Ion Selective Electrode
(ISE)-Hg(II) Performance using Ionophore DBA218C6
(N,N'-Dibenzyl-1,4,10,13-tetraoxa-7,16-diazacyclo octadecane), Plasticizer NPOE (Nitrophenyl Octhyl Ether),
Anionic Site KTCPB (Potassium Tetrakis (4-chloro phenyl) borate) have been
performed. Membrane compositions used were:(a) PVC (30 mg), NPOE (60 mg),
DBA218C6(6 mg) and KTCPB (4 mg); (b) PVC(30 mg), NPOE (60 mg), DBA218C6(7 mg)
and KTCPB (3 mg); (c) PVC (30 mg), NPOE (59 mg), DBA218C6 (8 mg) and KTCPB( 3
mg). The concentration range of interference ions Zn(II), Cd(II) and
Pb(II) were 1.0 x 10-3 - 1.0 x 10-1 M.
ISE-Hg(II) performance for membrane composition of 30 : 60 : 6 : 4 was 26.34 mV
per decade (Nernstian Slope value) on Hg(II) concentration range of 1.0x10-6 -
1.0 x 10-1 M , membrane composition of 30 : 60 : 7 : 3 was 27.71 mV per decade
on Hg(II) concentration range of 1.0 x10-6 - 1.0 x10-1 M, and membrane
composition of 30 : 59 : 8 : 3 was 28.52 mV per decade on Hg(II) concentration
range of 1.0 x10-6 - 1.0 x10-1 M with
activity between pH 1.0-3.0. The concentration of interference ions : Zn(II),
Cd(II) and Pb(II) in the range of 1.0 x 10-3 - 1.0 x 10-1 M with the ratio of
the primary ion to interference ions of 4 : 1 gave real effect. As results,
selectivities and sensitivities between ISE-Hg(II) and Ionophore DBA218C6 could
be determined by PVC-Based Membrane Composition and the effect of Zn(II),
Cd(II) and Pb(II) interference ions was
observed in the concentration of 1,0 x10-3 - 1,0 x10-1 M.
Penulis: Abd. Wahid Wahab
Kode Jurnal: jpkimiadd060050
