| Comparison Study On the Air Sampling for Rapid Response Chemical Accident - Hydrogen Chloride and Hydrogen Fluoride- |
| 화학사고 신속 대응을 위한 대기 시료 포집방법 비교연구 -염화수소와 불화수소를 중심으로- |
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이진선1, 윤영삼1, 김기준1, 윤준헌2, 석광설1, 최경희1 |
1국립환경과학원
2화학물질안전원 |
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| Abstract |
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Among all chemical accidents that have occurred over the last decade, those related to acid chemicalsaccount for 41%, which indicates that acids are very likely to cause accidents. Once released, acids can moveto various media such as air, water and soil, subsequently having effect on the environment. In particular, theyspread very quickly when leaked in gaseous phase into the atmosphere. Considering these characteristics, it isvery important to make immediate responses to acid leakage. It is also essential to promptly analyze the concentrationsof acids in the air to assess their effect on human health and the environment. However, Korea hasno official testing methods applicable to inorganic acid leakage, and inevitably relies on foreign testing proceduresinstead. In this study, research was conducted with hydrogen chloride and hydrogen fluoride, both ofwhich present high accident rates and serious aftereffects. The efficiencies of sampling with impingers and sorbenttubes were compared using IC analysis. Hydrogen chloride and hydrogen fluoride captured by impingersshowed their recovery rates as 105% (±20.7%) and 99.4% (±14.1%), respectively. When silica gel tubes wereapplied, the rates were each 83.0% (±6.1%) and 88.0% (±13.6%). These two sampling methods were foundto have recovery rates ranging from 83 to 105%, and their precision was within 20%. This indicates that bothmethods are adequately applicable to on-site sample capturing. The adsorption approach with sorbent tubes isconsidered especially useful for chemical accidents that need to be quickly responded to, because it uses a simpleset of equipment, helping save much time for preparing and setting on site. |
| Key Words:
Hydrogen chloride, Hydrogen fluoride, IC, Silica gel tube, Impinger |
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