DBS-偶氮胂双波长分光光度法测定土壤中可溶态轻稀土含量  

Determination of the Content of the Soluble Light Rare Earths in the Soil by DBS-Arsenazo Double-Wavelength Spectrophotometry

作　　者：刘德龙[1] 霍庆[1] 杨爱红 梁晨均 

机构地区：[1]河北师范大学化学系,河北石家庄050091

出　　处：《稀土》2000年第5期50-52,63,共4页Chinese Rare Earths

基　　金：河北省教委自然科学基金 !(982 0 7);河北省科委攻关项目资助

摘　　要：在酸度为 0 .8m ol/ L 条件下 ,以 DBS-偶氮胂为显色剂并采用双波长方法消除钙的干扰 ,测定了土壤中可溶态轻稀土含量。本法灵敏度高 ,方法简便 ,钙的允许量高 ,可达 30 mg/ 10 m L。用本法对几种样品进行了测量 。The determination of the content of the soluble light rare earths in the soil samples was studied.Double wavelength method was used to eliminate the interference of calcium and determine the soluble light rare earth content in the soil at 0.8mol/L HCl and DBS-Arsenazo as color reagent.This method is simple and has high sensibility and selectivity (high calcium content up to 30mg/10mL).Some samples were determined by this method and the results were satisfactory.

关 键 词：分光光度法 土壤 测定 稀土微肥 可溶态 

分 类 号：S151.93[农业科学—土壤学] O657.32[农业科学—农业基础科学]