金精矿生物氧化氧化液中氨氮的测定  

Determination of Ammonia Nitrogen in Biooxidative Oxidation Liquid of Gold Concentrate

作　　者：余国尉 Yu Guowei(Jiangxi Sanhe Gold Industry Co.,Ltd.,Dexing 334200,China)

机构地区：[1]江西三和金业有限公司,江西德兴334200

出　　处：《广东化工》2022年第14期168-170,共3页Guangdong Chemical Industry

摘　　要：金精矿生物氧化提金工艺中产生的生物氧化液中高酸性、高铁、高砷影响了氨氮测定的准确性和稳定性,本文通过实验对比应用氢氧化钠中和水体沉淀液体中的铁、砷等后再进行蒸馏,最后馏出液用纳氏试剂光度法测定氨氮值,并探讨了除砷铁及吸收过程中PH控制、蒸馏体积等问题。调整后方法标准加入回收在96.1%~103.5%之间,相对标准偏差为1.50%~3.34%,准确度和精密度较高,且具有操作简单快速、成本低等优势,适合批量样品测定。The high acid,high-speed rail and high arsenic affect the accuracy and stability of ammonia nitrogen determination,through the application of sodium hydroxide neutralizing water to remove iron and arsenic,then the distillation solution measured ammonia nitrogen value by luminosity method,and discussed the PH control and distillation volume in arsenic removal and absorption.After the adjusted method,the standard recovery is between 96.1 % and 103.5 %,and the relative standard deviation is 1.50 % and 3.34 %.High accuracy and precision,and the advantages of simple and fast operation and low cost,which is suitable for batch sample determination.

关 键 词：生物氧化 氧化液 蒸馏 氨氮 纳氏试剂光度法 

分 类 号：TQ[化学工程]