原子荧光光谱法测定微量元素预混料中砷含量的方法改进  

Improvement of the method for detecting the content of arsenic in the trace element premix with atomic fluorescence spectrometry

作　　者：邓田方 黎彩芳 徐焕宇 郑会祥 胡蝶 吴玉刚 DENG Tianfang;LI Caifang;XU Huanyu;ZHENG Huixiang;HU Die;WU Yugang(Zhanjiang Yuehai Premix Technology Co.Ltd.,Zhanjiang 524000,China)

机构地区：[1]湛江粤海预混料科技有限公司,广东湛江524000

出　　处：《养殖与饲料》2023年第9期10-14,共5页Animals Breeding and Feed

基　　金：湛江市水产饲料添加剂预混料工程技术研究中心建设(2022A1217)高新技术企业树标提质专题。

摘　　要：[目的]改进样品前处理方法后,采用改进后的原子荧光光谱法检测微量元素预混料中的砷含量,以提高检测结果的准确性。[方法]用湿法消解微量元素预混料样品后,在样品溶液中加入适量的氢氧化钠溶液,使样品溶液中的Cu^(2+)、Fe^(3+)等干扰因子和氢氧化钠反应生成氢氧化铜、氢氧化铁等沉淀物质,通过离心去除其干扰因子,再检测样品中的砷含量。[结果]原方法测定的结果稳定性差,改进后,检测结果稳定性好,加标回收率较高。[结论]采用改进后的方法测定砷含量的结果更准确。[Objectives]After improving pretreatment methods of the sample,the improved atomic fluorescence spectrometry was used to detect the content of arsenic in the trace element premix to im-prove the accuracy of the detection results.[Methods]After wet digestion of the pre-mixed sample of trace elements,an appropriate amount of sodium hydroxide solution was added to the sample solution,causing interference factors including Cu^(2+)and Fe^(3+)in the sample solution to react with sodium hydrox-ide to generate precipitates such as copper hydroxide.The interference factors were removed by cen-trifugation,and then the content of arsenic in the sample was detected.[Results]The stability of the results determined by the original method was poor.The stability of the results detected with the im-proved method was good.The recovery rate of the added standard was high.[Conclusions]The im-proved method is more accurate in determining the content of arsenic.

关 键 词：原子荧光光谱法 微量元素预混料 砷 快速检测 饲料安全 

分 类 号：O657.31[理学—分析化学]