This study was performed to improve the desorption efficiency and to measure storage stability for 1.3-butadiene collected on two activated charcoal tubes. This result will be used for measurement and evaluation of airborne 1,3-butadiene concentration for 1,3-butadiene exposed workers.
The results were as follows:
1. Using carbon disulfide(CS_2) and methylene chloride(Mc) as desorbing solvents, the desorption efficiencies of 1,3-butadiene spiked on untreated activated charcoal tube(100㎎/50㎎) were 8.99±2.57% and 53.86±10.55%, respectively.
2. Using MC, chloroform, 1% butanol in CS2, 1% methanol(MeOH)in MC and 3% MeOH in MC, the desorption efficiencies of 1,3-butadiene spiked on untreated activated charcoal bube(400㎎, 200㎎, separately) were 66.50±8.65%, 40.07±2.46%, 47.97±3.91%, 85.91±1.64%, and 89.33±3.87%, respectively.
3. Using CS2, MC, MeOH/MC(1/99), MeOH/MC(3/97), and Butanol/CS2(1/99), the desorption efficiencies of 1,3-butadiene spiked on 4-tert-butylcatecho(TBC) treated activated charcoal tube(100㎎/50㎎) were 79.91±7.24%, 81.73±10.07%, 85.89±5.07%, 80.37±2.49% and 97.24±4.98%, respectively.
4. On untreated activated charcoal tube(400㎎ and 200㎎, separately) in freezer(-20℃), the recovery rates of storage stability were 79.53% after 1 week, 79.49% after 2 weeks, and 78.71% after 3 weeks. In refrigerator(≤4℃), the recovery rate of storage stability were 79.80 % after 1 week, 73.23% after 2 weeks and 74.31% after 3 weeks.
5. Coefficient o fvariation of 1,3-butadiene was 5.9, 1.03 and 5.12 using MeOH/MC(1/99), MeOH/MC(3/97), and Butanol/CS2(1/99) on TBC treated activated charcoal tube(100㎎/50㎎).
6. On TBC treated activated charcoal tube(100㎎/50㎎) in freezer(-20℃), the recovery rates of storage stability were 90.07% after 1 week, 81.42% after 2 weeks, and 80.37% after 3 weeks. In refrigerator(≤4℃), the recovery rates of storage stability were 73.29% after 1 week, 63.56% after 2 weeks, and 58.88% after 3 weeks.
This study suggested that an optimum adsorbent and a desorbing solvent for 1,3-butadiene samples were TBC treated activated charcoal tube(100㎎/50㎎) and 1 % butanol in CS_2. For the storage stability, the samples should be stored in freezer(-20℃) and be analyzed within 1 week.
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