消泡剂硅油I在工业废水氨氮测定中的应用

APPLICATION OF SILICONE OIL I TO DETERMINATION OF AMMONIA NITROGEN IN INDUSTRIAL WASTE WATER

对色泽较深，含杂质量较高的废水加硅油I以抑制测定中蒸馏产生的泡沫．结果表明，在250ml水样中加硅油IO．10～1．25ml，即可收到理想效果．硅油I性质稳定，不随水蒸汽蒸出，对测定无干扰．

Silicone oil I is supplied into waste water with deep colour and higher content of impurity to eliminate foam from distillation during determinatin.The result shows that the best gradation composition is 0.10-1.25ml silicone oil I with 250ml water sample.Silicone oil I has a stable character which enable it not evaporate with water vapor and not interfere with determina- tion.