ガスビュレットを用いた塩素系漂白剤の有効成分の定量

概要

論文の詳細を見る
The hosehold bleaching agent, sodium hypochlorite, has been employed for bleaching, sterilization of drains and toilets, and cleaning sinks. For safe and effective use, particular attention should be given to the concentration of the agent, because the available concentration often decreases easily. According to the Japanese Industrial Standard, the concentration of sodium hypochlorite is determined titrimetrically with sodium thiosulfate and represented by the "concentration of available chlorine H." Titrimetric methods have required a variety of agents and have been accompanied by a difficulty in detecting the end-point of the titration. In this study, a method for measuring the available concentration was developed through the volumetric analysis of oxygen gas produced from the reaction when sodium hypochlorite and hydrogen peroxide are mixed. The method offered much saving in time, cost, and complexity. An analysis of the relationship between the amount of the oxygen gas and the concentration of available chlorine H by the JIS method showed a correlation of 0.998, indicating that this method is very useful for measuring the concentration of sodium hypochlorite in solutions. This method should enable the apparent rate constant of the reaction to be determined when the amount of the produced oxygen gas is measured at regular time intervals.
社団法人日本家政学会の論文
2001-02-15