1. 1. JIS K 8107, “Disodium Dihydrogen Ethylenediamine Tetraacetate Dihydrate”, 2006, Japanese Industrial Standards Committee, Tokyo.
2. 2. ISO 4325, “Soaps and Detergents—Determination of Chelating Agent Content—Titrimetric Method”, 1990, International Organization for Standardization, Geneva.
3. 3. D. L. Fuhrman, G. W. Latimer, Jr., and J. Bishop, Talanta, 1966, 13, 103.
4. 4. G. C. Clinckemaille, Anal. Chim. Acta, 1968, 43, 520.
5. 5. G. A. Rechnitz and N. C. Kenny, Anal. Lett., 1970, 3, 509