... water from an urban area in Japan and agricultural drains when agricultural chemicals are applied. In addition, analysis of agricultural chemicals by GC/MS was simultaneously carried out and ... Sawai A. and Urano K. (2007). Application of a larval medaka assay to evaluate the fish safety level in Sagami River, Japan, Environ. Monit. Assess., 130, 475-482. Ministry of Environment, Japan ... Supply Law of Japan, and had been prepared a mixture standard solution for simultaneous analysis commercially (Wako Pure Chemical Industries., Ltd., Japan). The water sample was concentrated by...