电感耦合等离子体发射光谱法测定红土镍矿中镍钴铜.pdf

0Ll年10月
矿测測试
Vol 30. No5
October 201!
ROCK AND MINERAL ANALYSIS
572-575
文章编号:0254-5357(2011)05-57204
电感耦合等离子体发射光谐法测定红土镍矿中镍钻铜
王国新,许玉宇,王慧,刘烽,吴骋,胡清
(常熟出人境检验检疫局,江苏常熟215500)
摘要:红土镍矿样品用无水Na2CO3-Na2B4O,混合嫆剂熔融,HCI浸出酸化,电感耦合等离子体发射光谱法直接
测定样品中镍、钴、铜的含量。Cu324.754mm使用Y371.030nm作为内标线,Ni231.604nm、Co228.616nm使
用Y224.306mm作为内标线校正基体千拢,方法检出限镍为0.5ug/g、钻为1.0ug/g、铜为1.0g/g,相对标准
偏差(RSD,n=7)为1.2%~2.0%,加标回收卒为95.0%~103.6%,能满足红土镍矿的分析要求。
关键词:电感耦合等离子体发射光谱法;内标法;红土镍矿;镍;钴;铜
Determination of Ni, Co and Cu in Laterite-nickel Ores by Inductively Coupled
Plasma-atomic Emission Spectrometry
WANG Guo-xin, XU Yu-yu, WANG Hui, LU Feng, WU Cheng, HU ing
( Changshu Entry-exit Inspection and Quarantine Bureau, Changshu 215500, China)
Astract A method for the determination of Ni, Co and Cu contents in laterite is presented in this paper. Laterite
samples were fused with a mixed flux of Na, O -Na B O then the analytes were extracted by HCI acid. The sample
solution was measured by inductively coupled plasma-atomic emission spectrometry(icp-aes). The internal standard
method was used to avoid matrix interference based on choosing Y 371. 030 nm as the internal calibration line for Cu
(324.754 nm and Y 224. 306 nm for Ni(231. 604 nm)and Co(228.616 nm). The detection limits for Ni, Co and
u were 0.5 ug/g, 1.0 wg/g and 1.0 w8/g, respectively. The relative standard deviations(RSD) of the test result
were 1. 2%-20%(n=7), and the recoveries ranged from 95% to 103.6%, which met the requirements of analysis
for laterite
Key words: inductiely coupled plasma-atomic emission spectrometry; interal standard method; laterite-nickel ore
nickel; cobat; copper
镍矿资源类型通常分为硫化镍矿和氧化镍矿",
红土镍矿中镍、钴、铜元素通常同时存在,而准确
氧化镍矿由于一般含有Fe而带红祸色,俗称红土镍测定其含量是红土镍矿生产利用、贸易结算的前提条
矿。由于开采成本的制约,以往都以硫化镍矿为主要件。由于红土镍矿为近几年才被广泛利用的矿产资
开采对象。近年来由于开采技术的提高和镍消费的需源,其测定方法和文献相对较少。张建波等?利用
求量进一步增大,占镍储量70%的红土镍矿日凎受到X射线荧光光谱法直接测定红土镍矿中主、次量元素;
人们的关注,特別是2006年以来,我国从印度尼西亚、但由于缺乏标准物质,方法难以实现和推厂广。国家标
菲律宾等国进口了大量红土镍矿。
准GB/T1592334利用浓王水和HF溶解样品,原子
收稿日期;2010-11-16;接受日期:2011-02-16
基金项目:全国有色标委会制标项目(2010086
作者简介:王因新,硕士,主要从事金属材料和矿产品的化学检测工作。E-mail:13814994292@163,com。
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