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Table 2 Mean air ion counts and air conditions recorded during the various experiments

From: Effect of negative air ions on the potential for bacterial contamination of plastic medical equipment

Experiment Negative ion count
(ions/cm3)
Negative ion count
(ions/cm3)
Negative ion count
(ions/cm3)
Average air condition
  Ionizer off
(<600 s)
Ionizer on
(600 - 2800 s)
Ionizer off
(>2800 s)
 
Ventilator tubing * 770 28800 510 26.6°C & 33.4% RH
Ventilator tubing ** 510 77200 480 25.1°C & 40.2% RH
Mask* 460 37100 300 22.3°C & 41.6% RH
Mask ** 1650 85600 430 23.3°C & 40.2% RH
Nebulizer tubing * 1230 84600 360 23.3°C & 41.7% RH
Nebulizer tubing ** 480 52200 340 23.5°C & 41.3% RH
Unometer™ (measuring chamber) * 450 65500 240 23.9°C & 39.8% RH
Unometer™ (measuring chamber) ** 520 74300 240 24.4°C & 38.4% RH
Unometer™ (tubing) * 800 58600 360 23.7°C & 42.8% RH
Unometer™ (tubing) ** 390 56800 320 24.2°C & 40.3% RH
Disposable apron * 820 54300 670 24.3°C & 37.8% RH
Disposable apron ** 640 47800 420 24.3°C & 37.3% RH
  1. * in free space
  2. ** in contact with table