FIELD: analytic chemistry. SUBSTANCE: ammetric sensor for determining silicon in the form of syliconolybdic heteropolyacid has an ammeter connected to two-electrode cell composed of a comparison electrode and an indicator electrode fabricated of a coal paste. Under static conditions silicon is determined in the range of 5-200 micro g/l, a measurement time period being of 35 min. EFFECT: enhanced accuracy and reliability.
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