pH值对非电解微酸性次氯酸消毒剂应用中有效氯的影响观察

The effect of pH value on available chlorine in the application of nonelectrolytic slightly acidic hypochlorous acid disinfectant

目的观察pH值对非电解微酸性次氯酸消毒剂(CELA水)应用中有效氯的影响.方法采用比较法对养殖场水体和生成的CELA水各成分进行检测与评价.结果养殖场水体和CELA水的pH值、TDS值与生成液有效氯含量无关,仅取决于稀释倍数.添加有效氯为48 mg/L的次氯酸后,沈阳养殖场水体pH值与次氯酸含量成反比、与次氯酸根含量成正比.降低CELA水的pH值能保持生成液的次氯酸纯度与含量;添加食盐能使生成液的TDS值增高,但不影响有效氯的含量.结论降低CELA水pH值到4.5~5.0,能保证生成液性质在规定范围,符合美国农业部NOP有机认证的次氯酸动态转化规律.

Objective To observe the effect of pH value on the available chlorine in the application of nonelectrolytic slightly acidic hypochlorous acid disinfectant(CELA water).Methods The comparative method was used to detect and evaluate the various components of the farm water body and the generated CELA water.Results The pH value and TDS value of the farm water body and CELA water had nothing to do with the generated available chlorine content,but only depended on the dilution factor.After adding hypochlorous acid with 48 mg/L of available chlorine,the pH value of the water body of Shenyang farm was inversely proportional to the hypochlorous acid content and directly proportional to the hypochlorite content.Lowering the pH value of CELA water could maintain the purity and content of hypochlorous acid in the generated solution.Adding salt could increase the TDS value of the generated solution,but did not affect the available chlorine content.Conclusion Lowering the pH value of CELA water to 4.5~5.0 can ensure that the properties of the generated solution are within the specified range,which conforms to the dynamic conversion law of hypochlorous acid certified by the United States Department of Agriculture NOP.