抄録
Trace organics in tap water and river water were investigated by mass fragmentography, computerized GC-MS, and GC-high resolution-MS. The sampling procedure of tap water was continuously conducted by a XAD-2 resin column (30cm 4cm i. d.) sampler designed for this study. A total volume of 30, 000 liters of tap water was taken at an approximate flow rate of 300 ml/mm for 60 days. The column sorbed organics was eluted in turn with 300 ml of 0.05 M hydrochloric acid, 300 ml of 0.05 M sodium hydroxide, and 300 ml of ethyl ether to remove basic, acidic, and neutral organics, respectively. After 400 liters of a river water sample was filtered through teflon filters having 1.0 pm pore size under added pressure (1-3 kg/cm2), it was separated into both filtrate and suspended solids. The filtrate was passed through a XAD-2 resin column (30cm×2cm i. d.) and the suspended solids of river water was extracted with benzene for 24 hr on a Soxhlet extractor. The extracts containing the neutral organics was concentrated in a KD evaporator and fractionated into three fractions which were eluted with 20 ml of isooctane, 25 ml of isooctane/benzene (1 : 1), and 15 ml of benzene/methanol (1 : 1) on a silicagel column (100-200mesh, 6g, 20cm×1cm i. d.).Separation and identification of neutral organic components were performed by the GC-MS techniques. By this methods 51 compounds were found from tap water including camphor and menthol as odorous components. Also 41 and 27 compounds were found from a filtrate and suspended solids of river water respectively.
