有機りん酸トリエステル類の室内および外気濃度測定

概要

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The concentrations of airborne organic phosphate triesters (11 compounds) were measured. The samples were collected from 44 rooms of 22 houses, 22 offices of 11 buildings and 17 points outdoors in Tokyo. Air sampling was carried out using a quartz fiber filter for the first stage and a solid phase extraction disc (EmporeTM C18) for the second stage at a flow rate of 10 l/min for 24 hours. The samples were extracted with acetone and organic phosphate triesters were analyzed by GC-FPD. The six compounds detected in almost all indoor air were triethylphosphate (TEP), tributylphosphate (TBP), tris(2-chloroisopropyl)phosphate (TCIPP), tris(2-chloroethyl)phosphate (TCEP), tris(butoxyethyl)phosphate (TBEP) and triphenylphosphate (TPHP). The compound detected with the highest median concentration in houses was TBP (12.0 ng/m3), while that in offices was TCIPP (19.3 ng/m3). The median concentration ratio of indoor to outdoor of these 6 compounds varied from 2.1 to 18.3. A comparison of houses and offices in terms of concentration showed that the median of the 6 compounds were higher in offices, but the maximum were higher in houses. In particular the maximum concentration of TCIPP in houses was as high as 14 μg/m3, which was 115 times higher than that in offices.
2001-09-20