铋磷钼蓝分光光度法测定土壤中磷含量

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5.0 mg/kg,对磷含量为475 mg/kg和292 mg/kg的标准土壤样品进行测定,结果与标准值吻合,其相对...

Determination of phosphorus content in soil by molybdobismuthylphosphoric blue spectrophotometric method

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＂ （GB 9837-88） and phosphorus fast detector method. The detection limit of the method was 5.0 mg/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.