1990 Volume 25 Issue 1 Pages 30-40
A determination was studied for acidic gases (HCl, HNO3, SO2) and particulate matter (Cl-, NO3-, SO42-) in the atmosphere.
The investigation revealed the following points:
1. Combination of the polyamide filter collection system provided with diffusion denuder tubes and the polyamide filter plus alkaline filter collection system enabled to collect acidic gases and particulate matters separately. Furthermore, these compounds could be determined rapidly by using Ion chromatography.
2. If an aqueous solution of 5% potassium carbonate and 2% glycerol is used for coating the inside of the tube, more than 97% collection efficiency and more than 95% penetration efficiency were achieved for acidic gases and particulate matter, respectively, at a flow rate of 12l/min (1l/min per piece).
3. Acidic gases and particulate matter in the atmosphere were separately determined in March 1985 by the method. HCl 0.4-5.8ppb, Cl-0.6-4.5 μg/m3, HNO3 0.4-2.9 ppb, NO3- 2.2-8.5 μg/m3, SO2 2.0-11.4 ppb and SO42-;4.1-4.7 μg/m3.
The limit of detection of this method (sample air volume: 720 liters) are HCl 0.18 ppb, Cl-0.28 μg/m3, HNO3 0.08 ppb, NO3- 0.20 μg/m3, SO2 0.08 ppb and SO42- 0.34 μg/m3.
