Properties Nitrogen Dioxide. NO2 Sulfur Dioxide. SO2
Model Number DIF 100 RTU DIF 600 RTU
Absorbent % 20 Triethanolamine/           Deionized Water Potassium Hydroxide
Method of Analysis UV/VIS Spectrophotometric Ion Chromatography
Tube Size 71 mm height. 11 mm internal diameter 71 mm height. 11 mm internal diameter
Duration of Exposure 14 day 14 day
Amount of Air Intake 72 cm3.hour-1 0.95 cm3.hour-1
Average Measurement Accuracy +/- % 3.69 +/- % 12.38
Lower Detecting Limit 0.34 ppb 0.5 ppb
Reference TS EN 13528/1-3 TS EN 13528/1-3
Table 3: Properties of Passive Samplers.