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.
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)
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。
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
atomic fluorescence spectrometry,trace element premix
arsenic
rapid detection
feed safety