期刊名称：Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram
印刷版ISSN：2338-4530
电子版ISSN：2540-7899
出版年度：2013
卷号：1
期号：1
页码：67-79
DOI：10.33394/j-ps.v1i1.520
出版社：IKIP Mataram, Fakultas Pendidikan Matematika dan IPA
摘要：The amide compound derived from humic acid has been applied as ionophore in ion selective electrode (ISE) measurement based on poly vinyl chloride (PVC) membrane. The carboxylic acid group of the humic acid was first modified to the corresponding amide and is expected to form complex with the target cation. This work aims at obtaining selectivity coefficient towards Ni 2 ion. The products of the reactions were observed using infra red (IR) spectrometer. The amide compound derived from humic acid was immobilized into the membrane with composition percentage (w/w) as the following 32% of PVC, 64% of plasticizer of either [orto-nitrophenil octyl ether (NPOE) or dioctylpthalate (DOP) or dibenzyl ether (DBE)], 2% of lipophilic anion [sodiumtetraphenylborate (NaTPB), and oleic acid], and 2% of ionophore the humic amide, respectively. The results show that ISE membrane give selective response to the Ni 2 ion at pH of 4,5 with response time of approximately 80 seconds. Among many others, the cations that give strong emf interference include Cu 2 , Li , K , Pb 2 , Na , Zn 2 , and Ca 2 . The Nernstian factor of ISE membrane is close to 28 mV per decade with linear range of concentration of pNi 2 of 1-6, with composition PVC membrane, DBE as plasticizer, oleic acid as lipophilic anion, and humic amide as ionophore, respectively.
其他摘要：The amide compound derived from humic acid has been applied as ionophore in ion selective electrode (ISE) measurement based on poly vinyl chloride (PVC) membrane. The carboxylic acid group of the humic acid was first modified to the corresponding amide and is expected to form complex with the target cation. This work aims at obtaining selectivity coefficient towards Ni 2+ ion. The products of the reactions were observed using infra red (IR) spectrometer. The amide compound derived from humic acid was immobilized into the membrane with composition percentage (w/w) as the following 32% of PVC, 64% of plasticizer of either [orto-nitrophenil octyl ether (NPOE) or dioctylpthalate (DOP) or dibenzyl ether (DBE)], 2% of lipophilic anion [sodiumtetraphenylborate (NaTPB), and oleic acid], and 2% of ionophore the humic amide, respectively. The results show that ISE membrane give selective response to the Ni 2+ ion at pH of 4,5 with response time of approximately 80 seconds. Among many others, the cations that give strong emf interference include Cu 2+ , Li + , K + , Pb 2+ , Na + , Zn 2+ , and Ca 2+ . The Nernstian factor of ISE membrane is close to +28 mV per decade with linear range of concentration of pNi 2+ of 1-6, with composition PVC membrane, DBE as plasticizer, oleic acid as lipophilic anion, and humic amide as ionophore, respectively.
关键词：Humic amide; ionophore; ion selective electrode; membrane; and Ni2 ion.
其他关键词：Humic amide; ionophore; ion selective electrode; membrane; and Ni2+ ion.
