| 摘要 |
FIELD: analytical methods. ^ SUBSTANCE: electrodes of piezoelectric resonator are modified with menthol phenyl salicylate vaseline oil, recommended solvent being toluene, modifier film weight 5-20 mug, drying temperature 20-35°C, and drying time 40-48 h. The following gains in aromatic amine determination sensitivity are thus obtained: for aniline, from 282 to 368 Hz-m3/g; for o-tolidine, from 68 to 78 Hz-m3/g; for 9-nitroaniline, from 136 to 125 Hz-m3/g. Reductions in relative deviation are, respectively, 6.0 to 3.2%, 7.0 to 3.6%, and 6.0 to 4.3%, sensor response time is decreased by 5 times, regeneration time is decreased by 24 times, and aniline detection threshold is lowered from 0.84 to 0.11 Delta, g/m3. ^ EFFECT: increased sensitivity and accuracy of determination. ^ 1 dwg, 2 tbl, 11 ex
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