In this work a PVC membrane electrode based on bis（N-3-methyl phenyl salicylidenaminato）copper（II）as ionophore was prepared.The electrode was tested by inorganic anions and showed good selectivity for thiocyanate ...In this work a PVC membrane electrode based on bis（N-3-methyl phenyl salicylidenaminato）copper（II）as ionophore was prepared.The electrode was tested by inorganic anions and showed good selectivity for thiocyanate ion.This sensor showed Nerstian behavior with a slope of a-59.3 mV per decade at 25℃.The proposed electrode exhibited a wide linear range from 1.0 × 10^-6 mol/L to 1.0× 10^-1 mol/L with a detection limit of 5.0×10^-7 mol/L.The electrode response was independent of pH in the range of 4.0-10.0.The response time is about 9-21s,and the electrode can be used for over 60 days without considerable deterioration.The prepared sensor was applied as an indicator electrode in potentiometric titration of SCN^- with Ag^＋ ion and to determine the thiocyanate in samples of urine and saliva.展开更多
The construction,performance characteristics and application of a new bismuth（Ⅲ） PVC membrane electrode based on 5-（3,4,5-trimethoxyphenyl）-4-amino-1,2,4-triazole-3-thiol are reported in this paper.The designed s...The construction,performance characteristics and application of a new bismuth（Ⅲ） PVC membrane electrode based on 5-（3,4,5-trimethoxyphenyl）-4-amino-1,2,4-triazole-3-thiol are reported in this paper.The designed sensor exhibited a Nernstian response for Bi^3＋ ion ranging from 5.0×10^-7 mol/L to1.0×10^-2 mol/L with a slope of 19.8 mV/decade.The operational pH range of the sensor is 3.0-6.0.The electrode shows a response time of 6 s and can be used for at least five weeks without any considerable divergence in potentials.It exhibits very good selectivity relative to a wide variety of alkali,alkaline earth,transition and heavy metal ions.The proposed electrode could be used as an indicator electrode in potentiometric titration of Bi^3＋ ions with EDTA and in the determination of Bi^3＋ content in stomach medicine.展开更多
文摘In this work a PVC membrane electrode based on bis（N-3-methyl phenyl salicylidenaminato）copper（II）as ionophore was prepared.The electrode was tested by inorganic anions and showed good selectivity for thiocyanate ion.This sensor showed Nerstian behavior with a slope of a-59.3 mV per decade at 25℃.The proposed electrode exhibited a wide linear range from 1.0 × 10^-6 mol/L to 1.0× 10^-1 mol/L with a detection limit of 5.0×10^-7 mol/L.The electrode response was independent of pH in the range of 4.0-10.0.The response time is about 9-21s,and the electrode can be used for over 60 days without considerable deterioration.The prepared sensor was applied as an indicator electrode in potentiometric titration of SCN^- with Ag^＋ ion and to determine the thiocyanate in samples of urine and saliva.
基金supported by the Science Foundation of Henan Province(No.142102310336)
文摘The construction,performance characteristics and application of a new bismuth（Ⅲ） PVC membrane electrode based on 5-（3,4,5-trimethoxyphenyl）-4-amino-1,2,4-triazole-3-thiol are reported in this paper.The designed sensor exhibited a Nernstian response for Bi^3＋ ion ranging from 5.0×10^-7 mol/L to1.0×10^-2 mol/L with a slope of 19.8 mV/decade.The operational pH range of the sensor is 3.0-6.0.The electrode shows a response time of 6 s and can be used for at least five weeks without any considerable divergence in potentials.It exhibits very good selectivity relative to a wide variety of alkali,alkaline earth,transition and heavy metal ions.The proposed electrode could be used as an indicator electrode in potentiometric titration of Bi^3＋ ions with EDTA and in the determination of Bi^3＋ content in stomach medicine.
