复合肥料多种养分含量快速分析新方法  

A New Approach to Rapid Determination of Compound Fertilizer Composition

作　　者：郭峥[1] 袁洪福[1] 张娴[1] 宋春风[1] 李效玉[1] 谢锦春[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《光谱学与光谱分析》2011年第9期2424-2427,共4页Spectroscopy and Spectral Analysis

基　　金：国家(863计划)项目(2009AA04Z129)资助

摘　　要：提出了一种同时测定复合肥料中多种养分含量的快速分析新方法,即用水将固体复合肥料定容溶解,采集其溶液部分的近红外光谱进行各种养分含量的分析预测。使用此方法建立了偏最小二乘回归模型,其中总氮、有效五氧化二磷、氧化钾和石粉含量模型的SEP值分别为0.5,0.7,0.8和2.0。方法操作方便,解决了近红外漫反射光谱法无法准确测定氧化钾含量的技术难题,实现了在5分钟内完成复合肥全部成分含量的快速准确分析。In the present paper, a new approach to rapid determination of compound fertilizer composition was introduced, namely first preparing aqueous solution of solid fertilizer, then predicting the compound fertilizer composition using the near in- frared transmission spectra of the solutior~ Using the new method, models were built by means of PLS regression, and the standard errors of prediction of total nitrogen content, PzO5 content, and K20 content are 0. 5, 0. 7, 0. 8, and 2.0, respective- ly. This has solved the problem of large prediction error for K content of compound fertilizer using near infrared reflectance spec- troscopy due to the fact that KCl dose not have near infrared absorption, and achieved rapid analysis of all compositions of com- pound fertilizer in 5 minutes.

关 键 词：复合肥料 养分 近红外光谱 偏最小二乘法 

分 类 号：O657.3[理学—分析化学]