尿基复合肥中总氮含量的快速测定  

Rapid analysis of total N content in ureabased compound fertilizer

作　　者：范传亮[1] 徐胜利[1] 张卫中[1] 程萍[1] 

机构地区：[1]中原大化集团有限责任公司,河南濮阳457004

出　　处：《磷肥与复肥》2004年第1期68-69,共2页Phosphate & Compound Fertilizer

摘　　要：用氯化钙作沉淀剂 ,消除磷酸根离子的干扰 ,用甲醛法测定复合肥中的总氮。介绍甲醛法分析氮的原理、操作步骤及计算方法 ,对于 2 0 10 10规格的复合肥 ,通过条件实验确定样品量和沉淀剂、硫酸、甲醛的适宜加入量。该法简便、快速、准确 ,加标回收率 97 5 %～ 10 3 3%With calcium chloride precipitant to eliminate the interference of PO_4^(3), total nitrogen in compound fertilizer is determined by formol method. The principle, procedure and calculation of total nitrogen analysis by formol method on 201010 compound fertilizer are described, and the proper amounts of sample, precipitant, sulfuric acid and formol are presented by conditional experiments. The method with a labeled recovery rate of 97.5%～103.3% is simple, quick and exact.

关 键 词：尿基复合肥 总氮 快速测定 甲醛法 

分 类 号：TQ444[化学工程—化学肥料工业]