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首页> 外文期刊>Journal of Environmental Science and Health >Titrimetric and photometric methods for determination of hypochlorite in commercial bleaches
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Titrimetric and photometric methods for determination of hypochlorite in commercial bleaches

机译：滴定和光度法测定商业漂白剂中的次氯酸盐

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摘要

Two methods, simple titration and photometric methods for determination of hypochlorite are developed, based its reaction with hydrogen peroxide and titration of the residual peroxide by acidic permanganate. In the titration method, the residual hydrogen peroxide is estimated by titration with standard permanganate solution to estimate the hypochlorite concentration. The photometric method is devised to measure the concentration of remaining permanganate, after the reaction with residual hydrogen peroxide. It employs 4 ranges of calibration curves to enable the determination of hypochlorite accurately. The new photometric method measures hypochlorite in the range 1.90×10~(-3) to 1.90× 10~(-2) M, with high accuracy and with low variance. The concentrations of hypochlorite in diverse commercial bleach samples and in seawater which is enriched with hypochlorite were estimated using the proposed method and compared with the arsenite method. The statistical analysis validates the superiority of the proposed method.
机译：建立了次氯酸盐与过氧化氢的反应和酸性高锰酸盐滴定残留过氧化物的两种方法，即简单滴定法和光度法。在滴定法中，通过用标准高锰酸盐溶液滴定以估算次氯酸盐浓度来估算残留的过氧化氢。与残留的过氧化氢反应后，设计了光度法来测量残留的高锰酸盐浓度。它采用了4个校准曲线范围，可以准确确定次氯酸盐。新的光度法可以测量1.90×10〜（-3）M至1.90×10〜（-2）M范围内的次氯酸盐，准确度高且方差低。使用拟议的方法估算了各种商业漂白剂样品和富含次氯酸盐的海水中次氯酸盐的浓度，并将其与亚砷酸盐方法进行了比较。统计分析证明了该方法的优越性。

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