【作者】 吴辉； 李成芳； 陈娟； 彭毛； 宋功武；

【Author】 Wu Hui Li Chengfang ChenJuan Peng Mao Song Gongwu College of Chemistry & Chemical Engineer HuBei University 430062

【机构】 湖北大学化学化工学院；

【摘要】 本试验通过微波消解法对有机物进行降解,然后测定该水样的吸光度,通过吸光度和剩余 Cr⁶⁺浓度之间的关系.间接测定化学需氧量。确定了试验的最佳条件为:微波消解功率 520W,消解时间4min,浓硫酸的体积与试样总体积的比为1:2,无须催化剂。该方法具有操作简单.测定快速等优点。对模拟废水的加标回收率在101.50%-115.05%之间。更多还原

【Abstract】 This experiment use microwave digestion method to get degradation of organic substance, then determine absorbance value of water sample,determine chemical oxygen demand indirectly through the connection between absorbance value and the concentration of Cr⁶⁺ remains.The optimal condition of digestion was obtained,which indicated that the power of microwave is 520 W, the time of digestion is 4 min,the volume of sulfuric acid is half of the total volume,the catalysts do not use.The method has many advantages such as simple operation and rapid monitoring.The range of the recovery is from 101.50% to 115.05%.更多还原