Virtual instrumentation for pH measurements in biological systems

In the present communication a personal computer control methodology for pH data acquisition and analysis in biological systems is reported. The instr umental control, acquisition, storage, processing and presentation of the e xperimental data are provided by a data acquisition board, a graphical prog ramming software and numerical analysis,'graphics software. The major objec tive of this work is to improve the performance and flexibility of the pers onal computer acquisition system compared with traditional approaches depen ding on potentiometric recorders. In particular. virtual instruments for in terfacing pH meters of different brands to a personal computer and for meas uring proton changes in lightly buffered solutions during enzymatic reactio ns are provided. (C) 1999 Elsevier Science Ireland Ltd. All rights reserved .