Abstract
A flow injection analysis system for the determination of short-chain fatty acids was developed incorporating a microbial electrode based on an oxygen electrode and Arthrobacter nicotiana immobilized behind a dialysis membrane. The system showed a high selectivity for short-chain fatty acids (C 4:0 -C 12:0 ), and the system response was linearly related to the concentration of butyric acid over the range 0.11-1.7 mM. The sampling freguency was approximately 20 samples/h at a carrier flow rate of 1.0 mL/min
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