FIELD: devices for measurement of concentration of metal ions in solutions. SUBSTANCE: method involves mixing binder to graphite carbon and vacuum-pumping of mix simultaneously with its melting. Then, melted mix is formed and cooled. Graphite carbon is designed as powder, which particle size is within range of 10-50 microns, and amounts to 30-70 in terms of weight. Binder is designed as polyolefine. EFFECT: increased temperature and acid-alkali range of electrode operations. 1 dwg, 1 tbl
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