METHODS Residual concentrations of sodium formaldehyde sulfoxylate in the solutions determined by iodimetry were with linear regressions to obtain the constants of reacting rate.

• 方法 在不断通入空气的情况下，采用碘量法测定甲醛合次硫酸氢钠在水溶液中不同时刻的浓度，作出降解曲线，并计算反应速率常数。