饮水中阴离子合成洗涤剂有效检测时限研究

The Effective Detection Time Limit of Anionic Surfactant in Drinking Water

目的通过对含不同浓度阴离子合成洗涤剂的市政末梢水样进行连续多天检测,以获得生活饮用水中阴离子合成洗涤剂的有效检测时限及保存方法。方法使用SPSS 19.0统计软件中重复测量资料方差分析,讨论影响生活饮用水中阴离子合成洗涤剂稳定性的因素。结果本次试验从时间和添加保护剂两个因素进行研究。固定时间因素,分析保存剂对实验组和对照组的影响:P<0.05,差异有统计学意义。研究时间影响,放置时间对稳定性影响较大,实验组240 h(10 d)内,浓度变化率均低于10%,对照组96 h(4 d)内,浓度变化率低于10%。结论采样后水溶液的有效放置时间是96 h(4 d),若添加保存剂,有效放置时间为10 d,且越快检测结果越有意义;保存剂(35%~40%甲醛溶液)的1%添加量,对延长阴离子合成洗涤剂有效检测时限有明显作用。

Objectives To investigate the effective detection time limit and preservation method of anionic surfactant in drinking water by monitoring different concentrations of water samples for many days.Methods The variance of repeated measurement data was analyzed in SPSS 19.0 statistics software.And the factors affecting the stability of anionic synthetic detergent in drinking water was investigated.Results The experiment was carried out from two factors： time and adding preservative agent.Taking time as an invariant and preservative agent as a variant,it was found that the preservative agent had statistical significance in the experimental group and the control group(P〈0.05）.With time factor,the influence of storage time on the stability were greater.The change rate of concentration in experimental group was less than 10% in 240 h(10 days）.And those in control group was less than 10% in 96 h(4 days）.Conclusions The effective detection time limit in water is 96 h(4 days）,and it is 10 days about water adding preservative agent,and faster detection,more meaningful.The preservative agent(formaldehyde 35%-40%,with an addition of 1%） had a clear effect on prolonging the effective detection time limit of anionic surfactant in drinking water.