title: 2,6-bis-methylsulfanyl-[1,3,5]thiadiazine-4-thione as a Ag+-selective ionophore.
abstract: A silver ion-selective electrode was prepared with a polymeric membrane incorporating 2,6-bis-methylsulfanyl-[1,3,5]thiadiazine-4-thione as an ionophore, tri-n-butylphosphate (TBP) as a plasticizer and sodium tetraphenylborate (NaTPB) as an additive. The electrode exhibited a near-Nernstian response of 52 mV/decade over a wide linear concentration range of 1.0 x 10(-5) - 1.0 x 10(-1) M with a lower detection limit of 9.77 x 10(-6) M. The electrode exhibited excellent selectivity for silver ion over many of the alkali, alkaline-earth and transition metal ions. The electrode worked well over a wide pH range of 1.77 - 7.13. The response time of the electrode was less than 20 s. The sensor can be applied as indicator electrode for the potentiometric titration of Ag+ ions with Cl- ions.
authors.affiliation: Department of Chemistry, Guru Nanak Dev University, Amritsar-143005, India. rakesh_chem@yahoo.com
authors.forename: Rakesh Kumar
authors.initials: RK
authors.lastname: Mahajan
authors.forename: Pallavi
authors.initials: P
authors.lastname: Sood
authors.forename: Mohinder Pal
authors.initials: MP
authors.lastname: Mahajan
authors.forename: Parvesh
authors.initials: P
authors.lastname: Singh
mesh_terms: D006863:Hydrogen-Ion Concentration; D017736:Ion-Selective Electrodes / Q000592:standards*; D007476:Ionophores / Q000737:chemistry*; D015394:Molecular Structure; D010968:Plasticizers / Q000737:chemistry; D012834:Silver / Q000032:analysis / Q000737:chemistry*; D013843:Thiazines / Q000737:chemistry*; D013871:Thiones / Q000737:chemistry*
chemical_list: C493402:2,6-bis-methylsulfanyl-(1,3,5)thiadiazine-4-thione; D007476:Ionophores; D010968:Plasticizers; D013843:Thiazines; D013871:Thiones; D012834:Silver