Thermal Studies of New Lead(II) Coated-Wire Membrane Electrodes

Abstract

, and 1.9 Â 10 À4 -4.0 Â 10 À2 M for electrodes composed with the ionophores I -V, respectively. All electrodes showed pH range of about 4.0 to 11.5 and working temperature range of 22 to 70 8C with isothermal temperature coefficients of 1.19 Â 10 À3 , 1.16 Â 10 À3 , 1.16 Â 10 À3 , 1.00 Â 10 À3 , and 1.32 Â 10 À3 V/8C for electrodes I -V respectively.

Can Temperature Be Used To Tune the Selectivity of Membrane Ion-Selective Electrodes?

“…The theory of the effect of temperature on the selectivity of both types of electrodes is also discussed. This study is different from prior work that evaluated the effect of temperature on the slope of an ISE’s calibration plot or determined the usable temperature range of the electrode. , …”

“…The effect of temperature on the ISE’s characteristics is evident in the Nernst equation; the electrode slope increases theoretically by ∼2 mV/decade with each 10 °C temperature change. Nearly all the work in the literature has been directed at studying the effect of temperature on the electrode slope and determining the usable temperature range of the electrode. − Recently, a new approach to modulate the response of the ISEs has been introduced . In this method, an implanted integrated circuit was used to heat locally the polymeric membrane through a high temperature pulse.…”

Synthesis of azacrown sulfonamides via ring closing metathesis and their evaluation in lithium ion selective electrodes

“…19 Pure silver rods of 10 cm length and 5.0 mm diameter, purchased from Goodfellow Cambridge LTD, England, were insulated by tight polyethylene tubes leaving 2 cm at one end for connection and 1 mm at the other end to be coated anodically with AgCl. Membrane solution was prepared by dissolving 18.00 mg of the ionophore, 139 mg of PVC, 139 mg of plasticizer (tris-2-ethylhexylphosphate, TEHP), and 1.42 mg potassium tetrakis(4-chlorophenyl) borate (KTpClPB) in 500 µL tetrahydrofuran (THF).…”

Lead(II) ion selective electrodes with PVC membranes based on two bis-thioureas as ionophores: 1,3-bis(N′-benzoylthioureido)benzene and 1,3-bis(N′-furoylthioureido)benzene

“…Some reports show that molecules with bis-amide and bis-thioamide functional groups [11][12][13][14][15] may be employed as ionophores in the determination of Cd(II) and Pb(II).…”