extractive technique
1.The waterworks A and B intake water from the Jialingjiang River,waterworks C and D from the Yangtse River,and waterworks E from the confluence of the two rivers. The solid extractive technique (amberlite GDX-120 resin) was used to extract respectively the organics from both raw water into and finished water from the five waterworks in the seasons of spring,summer and winter,and then the mutagenic activity of the organics was determined according to Ames assay.
