摘要
研究了邻二氮菲分光光度法测定土壤中铁的方法,探讨了方法的最佳条件。结果表明,以邻二氮菲为显色剂,可于510nm处测定土壤中铁的含量,铁含量在0～4mg/L范围内服从比尔定律,线性回归方程为y=0.377x+0.0022,相关系数γ=0.9989。
A new method for spectrophotometfic determination of iron in soil using phenanthroline was studied, and the optimal conditions of the method were investigated. The results showed that using phenanthroline as chromogenic reagent, the amount of Fe was determined at 510 nm in soil sample. Beer＇s law was obeyed in the range of0~4 mg/L for iron（m）, the linear regression equation was y=0.377x＋0.0022 with correlation coefficient of 0.9989, and the apparent molor absorption coefficient was found as 2.10×10^4 L-mol^-1·cm^-1. The method was simple, sensitive and has a good selectivity. It has been used for the determination of iron in soil, and the results obtained agreed with those ones achieved by sulfosalicylic acid method, the RSD was 0.50 %～1.0 %（n=6）.
出处
《广东化工》
CAS
2010年第3期184-184,187,共2页
Guangdong Chemical Industry
关键词
土壤
铁
邻二氮菲
分光光度法
soil
iron
phenanthroline
spectrophotometricmethod
