腐殖酸水溶肥料钼检测工艺研究

Research on Detection Technology of Humic AcidWater-soluble Fertilizer Molybdenum

腐殖酸水溶肥中含有活量氮、磷、钾复合营养,以及硼、锌、铜等元素,营养均匀,既能促进作物新陈代谢,加快细胞分裂,强化生理生化活性,又有协同营养作用,在农业上用途广泛。采用《水溶肥料铜、铁、锰、锌、硼、钼含量的测定》(NY/T 1974—2010)检测水溶肥料中钼含量的过程中,前处理工艺不尽如人意。基于此,改进了应用NY/T 1974—2010测定腐殖酸水溶肥料钼元素含量的前处理工艺。通过高温灼烧灰化样品,经酸溶解,过滤后用滤液进行测定分析。以艾氏卡试剂作为灼烧助剂,对灼烧条件进行优化,并在最优灼烧条件下,对样品进行加标回收试验,测得平均回收率达105%。经证明,试验数据准确可靠,有效地消除了试样基底干扰,具有可推广性。

Humic acid water-soluble fertilizer contains active nitrogen,phosphorus,potassium complex nutrition,as well as boron,zinc,copper and other elements,nutrition uniformity,not only can promote crop metabolism,accelerate cell division,strengthen physiological and biochemical activities,but also have synergistic nutrition,widely used in agriculture.In the process of detecting molybdenum content in water-soluble fertilizer by Determination of Copper,Iron,Manganese,Zinc,Boron and Molybdenum Con‐tent(NY/T 1974-2010),the pretreatment process was not satisfactory.Based on this,the pretreatment technology of NY/T 1974-2010 for determination of molybdenum element content in humic acid water-soluble fertilizer was improved.The samples were incin‐erated at high temperature,dissolved in acid,filtered and analyzed with filtrate.The sintering conditions were optimized with Ehrli‐card reagent,and the average recovery rate was 105%.It has been proved that the test data are accurate and reliable,and the interfer‐ence of sample base is effectively eliminated.