【摘要】 用连续流动注射法与亚甲蓝分光光度法测定水和废水中阴离子表面活性剂进行了测定,并对两种方法的测定值进行了比较,结果显示连续流动注射法和亚甲蓝分光光度法都有很好的准确度和精密度,分析一个样品需要3min,连续流动注射法的适用范围比亚甲蓝分光光度法宽,所需时间短但连续流动注射成本较高,在使用时需按仪器使用规程严格操作、清洗、维护,同时需严格控制实验室温湿度条件,否则对实验结果有较大影响。亚甲蓝分光光度法所分光光度计,成本小,且容易保养,维修费用不高。更多还原

【Abstract】 The determination of anionic surfactants in water and wastewater by continuous flow injection method and methylene blue spectrophotometry were studied. The results show that both continuous flow injection and methylene blue spectrophotometry had good accuracy and precision. It took 3 minutes to analyze a sample.The application scope of continuous flow injection method was broader than methylene blue spectrophotometry.The time required of continuous flow injection was shorter,but the cost was higher. It is necessary to operate,clean and maintain the instrument strictly in accordance with the operating rules of the instrument. At the same time,temperature and humidity conditions in the laboratory should be strictly controlled,otherwise there is a greater impact on the experimental results. Methylene blue spectrophotometry has the advantages of low cost,easy maintenance and low maintenance cost.更多还原