낙동강유역의 수질 및 담수어중 총수은함량에 관한 연구 = Studies on Total Mercury Contents of Water and Fresh Water Fishes from Nakdong River Bains

다국어 초록 (Multilingual Abstract)

Total-mercury contents of water and fresh-water fishes from NakDong river basin in July, 1985 were determined by Quartz Tube combustion-Gold Amalgamation method. Samples were collected at 12 sites (An Dong Lake, An Dong, Go Pyong, Nak Dong, Ku Mi, Sung Ju Bridge, Hyon Poong, Jeok Kyo, Nam Ji, Su San, Kim Hae, Ku Po) of Nak Dong river basin and physico-chemical. properties of water were determined by Horiba U-7 type analyzer Calibration method was used in calculation for those of fresh-water fishes and Standard Addition method, for water. The results were as follows ; 1 . Total mercury contents of 6 species, 124 freshwater fishes averaged 0.196ppm. 2. Total-mercury contents of Parasilurus Asotus were gradually increased from the upper stream to the down (0.25∼0.40ppm) 3. Total mercury contents in various parts of Carassius Auratus muscle were comparatively uniform. 4. Mean total mercury contents of Parasilurus Asotus (0.314ppm) was higher than that of Carassius Auratus (0.123ppm), which is thought to be caused by the difference of habitats. 5. pH and DO values of water were gradually decreased from the upper stream to the down. 6. Conductivity of Ku Po site was particulary high (1.8) 7. Total mercury contents of water averaged 0.279ppb. 8. The concentration ratio of total mercury contents between fresh-water fishes and water approximately averaged 773 : 1.