农业环境科学学报2011，Vol.30Issue(2)：404-408,5.
石墨炉原子吸收光谱法测定土壤铝的条件优化
Optimizing the Conditions for Soil Aluminum Determination with Graphite Furnace Atomic Absorption Spectrometry
摘要
Abstract
The active Al is one of the main factors that suppressing the growth of plant in acid soil, while the determination of soil Al is concerned by many researchers. It is widely used to determination of soil Al with graphite furnace atomic absorption spectrometry, because of its advantages of requiring less sample content, having higher sensitivity and efficiency and avoiding much more ions interference. The determination conditions for the soil Al using graphite furnace atomic absorption spectrometry, is generally carried out by the single factor rotation method with many disadvantages of taking much more work and without taking the impact of interaction of factors into account. In this paper,both double-factor experiment and orthogonal test, with the significant meaningful for determining Al quickly and accurately because of the deduction of workload and the representative for the test conditions, were all applied to the aluminum determination and resulted in the optimum wavelength of aluminum 309.3 nm and the lamp current 14 mA, and the optimum conditions were also obtained by the application of L2s(56) orthogonal test, as follows: the ashing temperature of 1 400 °C, the ashing holding time of 10 s, the atomization temperature of 2 300 °C, the atomization holding time of 5 s, the best matrix modifier of NH4H2PO4 (0.1％), and the best matrix acid of 0.2％ nitric acid. Moreover, the detection limit was 1.14 μg·L-1, the recoveries was within the range of 93.6％～104.1％ and the relative deviation was less than 8％ under the above optimum condition of determination. The determination of soil Al under the optimum condition would not only reduce significantly the workload but also get the better accuracy and precision. Furthermore the research result provides probably a new idea for obtaining the optimum determination conditions for other metal elements determination with graphite furnace atomic absorption spectrometry.关键词
石墨炉原子吸收光谱法/双因素/正交法/土壤铝Key words
graphite furnace atomic absorption spectrometry/ double-factor/ orthogonal test/ soil aluminum分类
资源环境引用本文复制引用
刘星,尤江峰,谢忠雷,丁岩,蔡靖,杨振明..石墨炉原子吸收光谱法测定土壤铝的条件优化[J].农业环境科学学报,2011,30(2):404-408,5.基金项目
国家自然科学基金青年科学基金项目(40903029) （40903029）
吉林大学"211 工程"三期建设项目 （）
