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晓庄校区水系中痕量总磷的分光光度测定法

The Use of Spectrophotometry in the Trace Concentration Determination of Total Phosphorus in the Water System on Xiaozhuang Campus
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摘要 通过使用国标方法、微波消解钼酸铵分光光度法两种方法,分别对晓庄校园内音乐喷泉、化学楼前水塘、生活用自来水三处地方的水样用722型紫外可见分光光度计测定其在710 nm处的吸光度,然后使用标准曲线法分别计算出这三处水样中痕量总磷的含量.两种方法测定的结果均显示,校园内音乐喷泉中出水口的总磷含量较其他处多.同时也表明微波消解钼酸铵分光光度法测定的结果精密度较国标法高,并且其回收率达到99.04%,操作简便、快速. In this paper,the national standard method and the microwave digestion ammonium molybdate spectrophotometric method were respectively used to determine the total amount of phosphorus in water at three places on Xiaozhuang campus-the music fountain,the river in front of the chemical building,and tap water for daily life. 722 UV visible spectrophotometer was used to determine the absorbance of water samples at 710 nm,and then the standard curve method was used to calculate the total trace amount of phosphorus in water at the three places. The results of the two methods used in this paper showed that the total phosphorus content in the music fountain was much higher than that in other places. The results also showed that the determination of microwave digestion by ammonium molybdate spectrophotometric method had a higher level of precision,compared with the national standard method,with the recovery rate at 99. 04%,and the operation of the former was fast and simple.
作者 杨慧
出处 《南京晓庄学院学报》 2017年第6期39-42,共4页 Journal of Nanjing Xiaozhuang University
关键词 水样 钼酸铵 紫外可见分光光度计 总磷 water samples ammonium molybdate UV-visible spectrophotometer total phosphorus
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