惠州西湖是我区较大的淡水养殖区之一,面积约1,500亩,主要放养四大家鱼,年产量近4,000担。西湖是游览区。近年来在湖区建有工厂,现在不仅有生活废水流入湖中,工业废水也有污染,因此有必要测定是否有汞污染水体,继而污染了湖中鱼类。此次测定的鱼样,直接取自湖中,每一品种鱼测定三次。样品以硝、硫酸消化,用测汞仪 CH7601测定。现将结果表列如下。 West Lake in Huizhou is one of the larger freshwater aquaculture areas in our district. It covers an area of ​​about 1,500 mu and mainly stocks four major domestic fish with an annual output of nearly 4,000. West Lake is a tourist area. In recent years, factories have been set up in the Lake District. Now, not only domestic wastewater flows into the lake but also industrial waste water. Therefore, it is necessary to determine whether mercury pollutes the water and then pollutes the fish in the lake. The determination of fish samples, taken directly from the lake, each species of fish measured three times. Sample to nitrate, sulfuric acid digestion, with mercury analyzer CH7601 determination. The results are tabulated below.