Abstract
Chloroform and an unknown substance was produced by the reaction of sodium hypochlorite with humic acid, one of the color ingredients in natural water. It was resulted in the increase of these substances either by the increase of humic acid and sodium hypochlorite concentration or by the elongation of reaction time.
By the application of GC-MS, the unknown substance was identified as chloropicrin.
Chloroform was formed most easily at pH 10, while chloropicrin was formed in the wide range of pH (pH 19). These products were readily volatized or decomposed.
Chloropicrin was presumably formed by oxidation of amino group in humic acid and by addition of chlorine.
