Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1994-08-31
1995-11-07
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
204416, 204419, 20415313, G01N 2726
Patent
active
054645115
ABSTRACT:
A novel series of chalcogenide glass compositions that are relatively highly selective for a specific ion in solution. When utilized as a sensing element for electrodes or similar analytical devices, a modified surface layer is formed on the surface of the glass in contact with the test solution. The surface layer being characterized by a surface ionic conductivity ranging from 10.sup.-7 to 10.sup.-2 S/cm, a diffusion coefficient ranging from 10.sup.-11 to 10.sup.-6 cm.sup.2 /s and having a ratio of electronic to ionic conductivity within the modified surface layer of not more than 1.0. Specific compositions having these unique morphology and transport properties are disclosed for the detection of cadmium, silver, thallium, mercury, copper and lead.
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Bychkov Yeugeni A.
Vlasov Yuri G.
Bell Bruce F.
Niebling John
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