Silver Sulfide Halide 막전극의 특성(Ⅱ) = A Study on the Characteristics of Silver Sulfide Halide Selective Membrane Electrodes(Ⅱ)

다국어 초록 (Multilingual Abstract)

The responsive characteristics of the halide ion selective membrane electrodes were investigated in test solutions by X-Y recording potentiometer (Watanabe type) equipped with saturated caromel electrode, as reference electrode and Ag_3SX/PVC-THF membrane electrode, as lndicating electrode. The results are as follows ;
1) The potential responses to selective membrane electrode of Ag_3SX, have the best sensitivity, reproductcity and stability in the case of Ag_SX membrane electrode coated with 0.1% P. V. C.
2) Ag_3SX-0.1% P. V. C. pellet, selective membrane electrode showed a good linear potential rasponse to the activities of halide in the concentration range from 10＾-2 to 10＾-6 M.
3) The electrode was not shown potential response significantly to the other cation, but exhibited a linear responses to silver ion activities in the concentration range from 10＾-1 to 10＾-6 M.
4) These membrane electrodes was found to be the most stable potential response and corresponded to nearly Nernstian slope when potential responses were determined by potentiometer after immersing selective membrane electrode in the suppersaturated solution of each selective halide ion.
5) The potential responses of these membrane electrodes showed a linear form in the pH range from 3.0 to 10.0.
6) The other of selective potential responses to Ag_3SX membrane electrodes was in the order of β-Ag_3SI＞Ag_3SBr＞Ag_3SCl and the orther of selectivity to Ag_3SI membrane electrode was in the order of I＾-＞Br＾-＞Cl＾- in the test solutions.
7) The Ag_3SX membrane electrodes were more stable than AgX membrane electrodes.