气敏氨电极法测定复合肥中总氮  

Determination of total N in compound fertilizer by gas-sensing ammonia electrode method

作　　者：张芳[1] 徐胜利[1] 范传亮[1] 张永江[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》2003年第2期66-67,共2页Phosphate & Compound Fertilizer

摘　　要：将复合肥试样消化处理 ,在消化后的溶液中加入碱 ,以气敏氨电极测其电位值 ,从而得出总氮含量。该方法简便、快速 ,结果与原方法吻合 ,加标回收率 92 .6 %～ 10 7.4 % ,RSD≤ 2 .1。After adding alkaline into the digested fertilizer sample, electric potential can be determined with the gassensing ammonia electrode and further the total nitrogen can be obtained. The method is quick and convenient, and its results are consistent with those obtained by other methods, with a labelled recovery rate of 92.6%～107.4%, RSD no more than 21. The method is suitable to central control analysis in a large scale compound fertilizer facility.

关 键 词：气敏氨电极法 测定 复合肥 总氮 中控分析 

分 类 号：TQ440.72[化学工程—化学肥料工业]