Abstract
Identification of α-BHC, TCTP, oxadiazon, CNP and chlomethoxynil by GC-MS and GC-ECD, and survey on level concentration in raw and finished water were previously reported.
We have since then examined the unknown peaks under GC-ECD, and consequently identified organophosphorus insecticides (diazinon, MEP), organochlorine herbicide (benthiocarb), organophosphate triesters (TBP, CRP, TPP, TBXP) and phthalic acid esters (DBP, DHP, DOP). Analysis of multicomponents identified in the previous and present studies has been established except for phthalic acid esters and TBXP.
Oxadiazon, CNP, chlomethoxynil and benthiocarb were detected at the level of ppt during the months these substances were used from a river (raw water) which ran through a paddy region. Diazinon and MEP were detected at the level of ppt also during such months from a river which ran through a cultivated field. TBP, CRP and TPP were detected at almost the same level of ppt throughout the year from the rivers under the influence of environment and industry.
The concentration of oxadiazon, CNP, chlomethoxynil, TBP, CRP, TPP, α-BHC and TCTP in raw water almost agreed with the concentration of them in finished water. However, diazinon, MEP and benthiocarb couldn't be detected from finished water. This fact is attributed to chlorination in water purification plants.
