| 摘要: |
| 土壤中磷含量的分析是土壤环境监测的主要项目之一。建立了铋磷钼蓝分光光度法测定土壤中磷含量的新方法，与现有的《土壤全磷测定方法》（GB 9837-88）和土壤总磷快速检测仪方法进行了比较讨论。方法的检出限为5.0mg/kg，对磷含量为475mg/kg和292mg/kg的标准土壤样品进行测定，结果与标准值吻合，其相对标准偏差RSD为2.82%和6.03%（n=6），相对误差分别为3.42%和9.55%。实验结果表明，此分析方法操作简便，选择性好，灵敏度高，测试结果能够满足对土壤环境样品中磷含量的监测要求。 |
| 关键词: 土壤 铋磷钼蓝分光光度法 磷 |
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| Determination of phosphorus content in soil by molybdobismuthylphosphoric blue spectrophotometric method |
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| Abstract: |
| Analyzing concentrations of phosphorus in soil is one of the main items in environmental monitoring. A new method for the determination of phosphorus content in soil by molybdobismuthylphosphoric blue spectrophotometric method was developed in this research. This newly developed method was compared with the existing “total phosphorus determination method in soil”（GB9837-88） and phosphorus fast detector method. The detection limit of the method was 5.0mg/kg. The spiked soil samples contained 475 mg/kg and 292 mg/kg of phosphorus standard were determined. The results were in agreement with certified values, and the relative standard deviation (RSD, n = 6) were 2.82% and 6.03%, respectively. The relative error was 3.42% and 9.55%, respectively. This method was simple, sensitive and with good selectivity. The new method can be widely used for the environmental monitoring of phosphorus content in soil. |
| Key words: Soil Molybdobismuthylphosphoric blue spectrophotometric method Phosphorus content |
