AMMONIA CONCENTRATION SENSOR Russian patent published in 1999 - IPC

FIELD: analytical instrumentation. SUBSTANCE: sensor contains carrier supporting electrodes and polyaniline-based sensitive layer containing modifying additive. The latter is 2:18 heteropolyacids with general formula H_6+nP₂W_18-nMo_nO₆₂ (n= 0-18) or their potassium, sodium, lithium, ammonium, cerium, cobalt, and manganese salts. Sensor can be utilized in environmental monitoring system. EFFECT: increased sensitivity and selectivity for ammonium in its mixtures with gases. 3 dwg, 2 tbl, 4 ex