| 摘要 |
Disclosed herein is a sanitizing composition comprising a mixture of a halogen source material (comprising of sodium or potassium dichlor, trichlor, calcium hypochlorite and/or lithium hypochlorite), non-halogen oxygen donor material (selected from an alkali metal or alkaline earth metal salt of dipersulfate) and a combination of copper and zinc transitional metal ions as a catalyst source. Particularly disclosed is a sanitizing composition comprising a mixture of a halogen source material, sodium dipersulfate and a combination of copper and zinc transitional metal ions as a catalyst source wherein copper is present as copper sulfate or copper citrate in an amount of 0.5 to 5% by weight of the composition and zinc is present as zinc sulfate in an amount of 2 to 10% by weight of the composition. Transition metal ions have the ability to increase the oxidation performance of the inorganic peroxy salts at room temperature by possibly lowering their activation energy or by producing more reactive free radicals. When two transition metal salts are used together to decompose dipersulfate, it provides synergistic oxidation activity, better than that obtained by dipersulfate or dipersulfate with either copper or zinc alone. The transition metals mentioned are the water soluble salts of copper and zinc. Oxidation performance of sodium dipersulfate in presence of catalytic amount of copper and zinc salts was determined by measuring the destruction of crystal violet dye at a wavelength of 589 nm.
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