Methods The organic extracts of output water were sampled with amberlite GDX-120 resin at 5 waterworks and seasonally at winter, spring and summer respectively.

• 方法 采用GDX 12 0大孔树脂 ,于春、夏、冬季在分别位于城区上游、城区中段、城区下游以长江、嘉陵江水源的五个水厂对出厂水进行有机物的浓缩及提取。