Abstract: The content of phosphorus in water is the sign to evaluate the quality of water and the effect of water treatment.The ammonium molybdate spectrophotometry method,a traditional detection method for mass fraction of total phosphorus in industrial circulating water,is improved.The influences of digestion agent,reducing agent and its stability,silicon ion interference and other factors on the determination results are studied.Finally,the hydrogen peroxide and microwave digestion method is confirmed as the determination method.It is found that through the digestion by hydrogen peroxide,the sample is completely oxidized and the digestion process remains stable.No phenomenon such as turbidity and sedimentation appear during the digestion as that often happens with the traditional method.The reproducibility stays at high level,the relative standard deviation locates within a reasonable range and the recoveries are ranged from 96.8% to 99.1%.Compared with other determination methods for total phosphorus content,this improved method exhibits simple,reliable,no need of masking agent,no generation of acid mist,pollution-free,safety and environmental friendliness.
邹静. 过氧化氢微波消解法测定工业循环水中总磷含量[J]. 现代化工, 2018, 38(7): 232-235.
ZOU Jing. Determination of total phosphorus content in industrial circulating water by hydrogen peroxide and microwave digestion. Modern Chemical Industry, 2018, 38(7): 232-235.