| 分光光度法测定土壤中总磷 |
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| 引用本文： | 潘平,康清蓉,李晓.分光光度法测定土壤中总磷[J].光谱实验室,2003,20(5):697-699. |
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| 作者姓名： | 潘平 康清蓉 李晓 |
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| 作者单位： | 重庆市环境监测中心,重庆市,400020 |
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| 摘 要： | 氢氧化钠熔融法消解，调节pH值，加入抗坏血酸溶液及钼酸铵盐溶液显色15min，用30mm比色皿，以水为参比．于700nm波长处测定吸光度，求出土壤中的总磷。实验表明，样品分解完全，回收率为96．2％-97．5％；RSD为3．1％；检出限为0．07mg／L；线性范围为0-1．00mg／L。本法简便、可靠、能够满足环境监测对土壤中总磷分析的需要。
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| 关 键 词： | 分光光度法 测定 土壤 总磷 环境监测 分析方法 |
| 文章编号： | 1004-8138(2003)05-0697-03 |
| 修稿时间： | 2003年2月3日 |
Determination of Total Phosphorus in Soil by Ammonium Molybdate Spectrophotometry |
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| PANG Ping,KANG Qing-Rong,LI Xiao.Determination of Total Phosphorus in Soil by Ammonium Molybdate Spectrophotometry[J].Chinese Journal of Spectroscopy Laboratory,2003,20(5):697-699. |
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| Authors: | PANG Ping KANG Qing-Rong LI Xiao |
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| Abstract: | After the soil sample was digested with melting NaOH,adjusted pH,reacted with vitamin C and ammonium molybdate for 15min.The total amount of phosphorus in soil was determined by spectrophotometry in 30mm cell at the 700nm against water.Beer's law is obeyed over the range of 0- 1.00mg/L with detection limit of 0.07mg/L.The relative standard deviation is 3.1% and the recovery is in the range of 96.2-97.5%.The method is simple and reliable. |
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| Keywords: | Ammonium Molybdate Spectrophotometry Soil Total Phosphorus |
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