加热灰化法在有机肥料磷和钾测定中的应用  

Application of heating ashing method in determination of phosphorus and potassium in organic fertilizers

作　　者：雒连春 陶小娟 李聪 姚萌奇 刘蓉 汪天胜 LUO Lianchun;TAO Xiaojuan;LI Cong;YAO Mengqi;LIU Rong;WANG Tiansheng(Gansu Institute of Product Quality Supervision and Inspection,Lanzhou 730050,China)

机构地区：[1]甘肃省产品质量监督检验研究院,甘肃兰州730050

出　　处：《磷肥与复肥》2022年第12期35-37,共3页Phosphate & Compound Fertilizer

基　　金：甘肃省市场监督管理局科技计划项目(SSCJG-ZJ-201911)。

摘　　要：采用加热灰化法批量处理有机肥料样品,分光光度法测定五氧化二磷,火焰光度法测定氧化钾。该方法的测定结果与浓硫酸-过氧化氢消解法相对偏差在1.56%~3.91%,加标回收率在96.1%~102.4%。与浓硫酸-过氧化氢消解处理样品对比,该方法检验效率提高,操作安全便捷,可为有机肥料中磷和钾含量的快速测定提供参考。Organic fertilizer samples are treated in batches by heating ashing method,phosphorus pentoxide is determined by spectrophotometry,and potassium oxide is determined by flame spectrophotometry.The results relative deviation between this method to the concentrated sulfuric acid-hydrogen peroxide digestion method is 1.56%-3.91%,and the recovery rate is 96.1%-102.4%.Compared with concentrated sulfuric acid-hydrogen peroxide digestion treatment of fertilizer sample,the test efficiency of this method is improved,and the operation is safe and convenient,providing a reference for rapid determination of phosphorus and potassium content in organic fertilizers.

关 键 词：有机肥料 加热灰化法 五氧化二磷 氧化钾 测定 

分 类 号：TQ440.72[化学工程—化学肥料工业]