An experimental glass-tight piezoelectric crystal cell has been developed for studying gas-solid reactions on piezoelectric quartz crystals and several substrates have been evaluated for the determination of SO2 in ambient air. Sodium tetrachloromercuriate adsorbs from 0.18 to 4.01 üg of SO2 in 15 minutes periods and shows the best results. A study of the effect of the voltage and temperature applied to the piezoelectric crystal has also been performed.
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Guilbault et al. (1971) studied this question.
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