Glutamine-selective membrane electrode that uses living bacterial cells

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Science  27 Jan 1978:
Vol. 199, Issue 4327, pp. 440-441
DOI: 10.1126/science.619467


A novel bioselective membrane electrode for L-glutamine has been constructed by coupling living bacteria of the strain Sarcina flava to a potentiometric ammonia gas sensor. Tests in aqueous standards and human serum show that the electrode combines excellent sensitivity and selectivity with rapid response and a useful lifetime of at least 2 weeks.