1. 1) W. Stumm, J. J. Morgan: "Aquatic Chemistry", 3rd ed., (1996), (Wiley Interscience, New York).
2. 2) JIS K 0102, 工業排水試験方法 (1993).
3. 3) APHA: "Standard Methods for the Examination of Water and Waste Water", 19th ed. (1995), (American Public Health Association, Washington, D. C.).
4. Preconcentration method for phosphate in water using activated carbon loaded with zirconium
5. 5) H. Hashitani, M. Okumura, Y. Seike: Jpn. J. Limnol., 57, 479 (1996).