Figure 12.8
Continuous-flow enzymatic determination of ethanol in beverages. To the
right is a series of six standards (0–0.4%) followed by six samples – orange
juice (1 and 10% v/v), bottled beer (1 and 10% v/v), red wine (1% v/v) and
liqueur (1% v/v), all analysed in triplicate. (From P. J. Worsfold, Chemistry in
Britain, December, 1988.)Figure 12.9
Block diagram of a remote spectrophotometric, flow injection based monitor for
the determination of nitrate in river water. Reduction to nitrate by copperized
cadmium followed by colour development with sulphanilimide and
N-I-naphthylmethylenediamine dihydrochloride.
(From P. J. Worsfold, Chemistry in Britain, December, 1988.)