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Silver Selective Electrode Based on Hybrid Mesoporous Silica (MCM‐41) Modified Material
Author(s) -
Singh Sanjay,
Rani Geeta,
Zhu Maiyong
Publication year - 2019
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201900050
Subject(s) - plasticizer , adipate , electrode , selectivity , detection limit , mesoporous material , ion selective electrode , inorganic chemistry , materials science , nuclear chemistry , chemistry , analytical chemistry (journal) , chromatography , organic chemistry , composite material , catalysis
A silver selective electrode based on TEPQA‐MCM‐41 material was developed and used for the selective determination of Ag + ion in various samples. The effect of various plasticizers i. e. dimethyl phthalate (DMP), Tris(ethylhexyl)phosphate (TEP), bis‐(2‐ethylhexyl)sebacate (BEHS), bis‐(2‐ethylhexyl)adipate (BEHA) was investigated. The electrode of the composition of 2 : 1 : 77 : 12 : 8 (w/w, %) of TEPQA‐MCM‐41 : NaTPB : Graphite powder : paraffin oil : DMP respectively, works satisfactorily in a wide concentration range of 1.3×10 −9 M–1.0×10 −1 M for Ag + ion with a lower detection limit (LOD) of 1.0×10 −9 M and has Nernstian slope of 63.4 ± 1 mV/decay. The electrode can be used in a pH range of 2.3 to 6.7 for a period of 3 months without any divergence in potential response. The selectivity coefficient calculated by fixed interference method indicates the high selectivity of the electrode towards Ag + ion over other tested cations.