Concentrations of Chlordane Homologues in Indoor and Outdoor Air in Tokyo and Kanagawa Area
1990 Volume 25 Issue 2 Pages 123-132
Details
1990 Volume 25 Issue 2 Pages 123-132
Concentrations of chlordane homologues (chlordanes) in outdoor air in Kawasaki area and in indoor air in Tokyo and Kanagawa area were measured by GC with selective ion monitoring MS (GC/SIM).
The concentrations of the sum of the eight chlordanes (total chlordane: TC) in outdoor air were ranged from 0.5 to 3μg/m3, and the mean value was 1.7μg/m3.
On the other hand, the concentrations of TC in houses treated for termites were approximately 1000 times as high as in outdoor air, and decreased as the time. The mean values classified with the elapsed time were as follows: 5.8 μg/m3 (less than 1 year), 1.7μg/m3 (1-2 years), 1.3μg/m3 (2-3 years), 0.6 μg/m3 (4 or 5 years), 0.4μg/m3 (8 or 9 years).
The result suggests that indoor air of the houses treated for termites might have heavily been polluted by insecticide containing technical chlordane.
Amounts of chlordane exposure to human being were estimated from the results. The consequence of the estimation suggest that a dweller who spent more than eighteen hours per day in a house might have inhalated more than 0.5μg/kg weight/day (acceptable daily intake decided by FAO/WHO) of chlordanes during 2, 5 years after termite treatment. Even a dweller who was in a house for ten hours per day might usually have inhalated more than 0.5μg/kg weight/day of chlordanes during a year or longer.
