확산 포집기를 이용한 공기중 유기용제 측정에 관한 연구 = The Air Monitoring of Ethylacetante and Toluene by Passive Sampling Method

다국어 초록 (Multilingual Abstract)

The laboratory and field tests for air monitoring of ethylacetate and toluene were carried by passive sampling methods and compared the results with using charcoal tubes.
The results were as follows;
1. The mean desorption efficiencies of A, B passive monitors were over 85%. Those of B passive monitor for ethylacetate, however, had been increased to 17.5% by using the agitator for desorption.
2. The capacities of A, B passive monitor which had been exposed at the 2×STD for 8 hours were increased linearly with time increasing. So, A, B passive monitor were more suitable than charcoal tubes at long time exposure level.
3. As for the back diffusion, A passive monitors showed 8.4% concentration difference for ethylacetate and 5.0% for toluene and B passive monitors showed 1.2% for ethylacetate and 1.3% for toluene, respectively. Both of A, B passive monitors showed less than 10% difference.
4. As for the face velocity, A passive monitor showed less than 10% difference between high and low face velocity. But B passive monitors showed 12.7% difference between high and low velocity. So, they seemed to be affected by face velocity.
5. The uptake difference between low and high humidity showed very low values which were 0.8-3.3% for EAc and 0.1-0.2% for toluene.
6. The precision and accuracy for A, B passive monitors were also checked. The coefficients of variance for A B passive monitors were 2.3-4.0% for A passive monitors and 5.5-9.0% for B passive monitors. Overall accuracies for A passive monitors were ±14.2-14.8% and ±18.5-19.9% for B passive monitors. Overall accuracies for them were below 25% at the 95% confidence level.
7. The results of air monitoring by using passive monitors for ethylacetate and toluene were compared with the results of using charcoal tubes in gravers printing plants.
The correlation between charcoal tubes and passive monitors were evaluated as Y=1.76X＋37(r=0.81, p<0.05) for ethylacetate and Y=1.36X-49(r=0.93, p<0.06) for toluene.