Quote:
|
Originally Posted by naiad
|
That's a good paper, if a bit scary. Never occurred to me those chemicals were there in the air. If I understand correctly, they took measurements at 1m above poolside, since that is where the attendants reside while working. (In USA pools, lifeguards often sit above, perhaps 2m above poolside).
Would it be correct to say they did not measure the air quality just slightly above the water surface (where swimmers typically breathe while doing laps), especially near the center of the pool? DDeden
"The atmospheric nitrogen trichloride levels were measured at the poolside in case one and during the specific challenge tests. The sampling and analysis of nitrogen chloride was conducted using the method proposed by Hery et al. 1. In brief the sampling device comprised of two parts: a tube containing silica gel coated with sulphamic acid to trap hypochlorite and mono- and dichloramine, and a cassette containing a quartz filter treated with sodium carbonate and diarsenic trioxide to trap nitrogen chloride. Sampling was conducted by drawing air through the sampling device using a calibrated pump operating at 1.1 L·min–1. After sampling, the quartz filter was desorbed in distilled water and the resulting solution analysed by ion chromatography using a cation exchange resin and a phthalic acid mobile phase adjusted to pH 4.2. The sampling and recovery efficiency of the filters used has been reported to be >95% 1.
A total of 15 samples for nitrogen chloride were collected in three indoor swimming pools over a 2-day period. Samplers were placed at positions normally occupied by the pool attendants, at ~1 m from the floor level. The airborne nitrogen chloride concentrations were also measured during the challenge test with the sampler located close to the breathing zone".
