高氯酸提取土壤中形态铁及其直接测定的研究  

Study on the Extraction Condition of Perchloric Acid and Direct Determination of Iron Species in Soil

作　　者：孟哲[1] 吴远远[1] 刘荣琴 张冬亭[1] 

机构地区：[1]河北邢台学院生化系 [2]邢台市产品质量监督检验所,河北邢台054001

出　　处：《化学世界》2008年第9期523-525,566,共4页Chemical World

基　　金：河北省科学技术研究与发展计划(072156171)

摘　　要：利用1mol／L高氯酸提取果园土壤中的Fe（Ⅱ），建立了在1mol／L高氯酸体系下，Fe（Ⅱ）与邻菲口罗啉显色反应（ε510===1．1×10^4L／（mol·cm）的分光光度法。具有快速、灵敏、提取与测定体系一致的优点。吸光度与浓度在0．063～8．0μg／mL范围内具有良好的线性，检出限为29ng／mL，相对标准偏差≤2．11％，平均回收率为97．5％。该法用于测定土壤中形态铁的提取与测定，均获得满意结果。By using perchloric acid to extract iron species in soil, a new method was developed for determination of iron species based on its eolour reaction with 1, 10-phenantbrotine in percbloric acid system. A linear relationship was obtained from 0. 063～8.0 μg/mL with a correlation coefficient of r^2 = 0. 9982. The detection limit was 29 ng/mL and the recovery of Fe（ Ⅱ ） was 97.5 % under the experimental conditions. The new method is more convenient, rapid and sensitive and has been successfully applied to the determination of Fe（ Ⅱ ） species in soil of plant living. The result was satisfactory.

关 键 词：土壤 铁 邻菲口罗啉 高氯酸 形态分析 

分 类 号：O655.6[理学—分析化学]