合金样品中钴、镍分量测定方法的研究

针对合金产品中添加的钴、镍元素在测定中的相互干扰，考察了消除干扰元素的条件，提出了在氨性介质中用丁二酮肟光度法测定镍、在微酸性介质中用亚硝基红盐光度法测定钴的分析方法。此方法测定结果相对标准偏差均≤2．0％。钴、镍加标回收率分别在91．0％～99．4％和92．5％～99．7％之间，线性范围均为0～12．0μg／ml。     

钒钛磁铁矿中钛、钒、磷、钴、镍的测定

采用HF—HNO3-HClO4-HCl溶样,直接在电感耦合等离子体原子发射全谱直读光谱仪测定钒钛磁铁矿中的钛、钒、磷、钴、镍,选用元素最佳分析谱线和仪器合适的工作条件进行测定,共存元素之间的干扰很小,测定值相对标准偏差小于2％,方法检出限为钛0．04％、钒0．001％、磷0．02％、钴0．001％、镍0．001％,方法精密度（RSD,n=12）为钛小于3．0％,钒小于2．0％,磷小于29％,钴小于3．0％,镍小于4．0％。通过国家一级标准物质GBW07224、GBW07227测试和其他样品不同仪器测定比较,测定结果相一致,分析方法快速简便,分析结果准确。     

萃取分离金属硅中的痕量镍元素的研究

采用石墨炉原子吸收法，用APDC—DDTC—MIBK萃取分离镍，对金属硅中的痕量镍进行了分析。讨论并确定了方法的最佳测定条件，结果表明，镍的检出限为1．2ng／mL，回收率为97．1％～101．2％，相对标准偏差为0．9％～1．7％。该法准确、快速、简便，应用于金属硅中痕量镍的测定，结果满意。     

镍电解溶液中铅的分析

为了快速准确测定镍电解溶液中的杂质元素铅,本文采用氢氧化镧共沉淀分离富集的方法,可于原子吸收分光光度计上直接测定镍电解溶液中的铅量。检出限达0．020mg／L;加标回收率为90．9％～108．8％;相对标准偏差RSD≤4．17％,在生产中具有推广应用价值。     

络合物吸附波JP303极谱法快速测定锌冶炼中间控制溶液中的镍量

文章探讨了镍与丁二酮肟（DMG）在氨-氯化铵底液中形成的极谱络合物吸附波,建立了快速测定湿法炼锌溶液中微量镍的新方法。丁二酮肟（DMG）-Ni（11）在-1．03V左右形成灵敏的络合物吸附波,镍浓度在5．1×10^-9～5．1×10^-7mol／L时,与相应峰电流有良好的线性关系。检出限为3．0×10^-7moL／L。该法已成功用于锌浸出液、电解新液、废液中镍的测定,样品平行分析相对标准偏差分别小于2．50％、2．77％、2．35％,加标回收率：98．75％～101．5％。     

萃取分离金属硅中的痕量元素的研究

采用石墨炉原子吸收法，用APDC-DDTC-MIBK萃取分离镍，对金属硅中的痕量镍进行了分析。讨论并确定了方法的最佳测定条件，结果表明，镍的检出限为1．2ng／mL，回收率为97．1％～101．2%，相对标准偏差为0．9%～1．7%。该法准确、快速、简便，应用于金属硅中痕量镍的测定，结果满意。     

火焰原子吸收光谱法快速测定纯镍中铁铜镁锰锌

提出了运用火焰原子吸收光谱法快速测定纯镍中铁铜镁锰锌的含量，介绍了铁铜镁锰锌最佳测定条件及呈良好线性范围的浓度，在测定中对样品中的干扰因素进行了综合考虑。该方法具有很好的灵敏度和重现性，具有方法步骤简单、操作容易、干扰少等特点。测定样品铁铜镁锰锌含量的相对标准偏差均小于1．0％（n=10）。标准加入回收率均在97．0％～99．0％（n=6）范围内。适用于纯镍材料中铁铜镁锰锌的含量控制分析和系统分析。     

钼精矿、钼焙砂中钴、镍、镁、铜、钙的连续测定

在硝酸-高氯酸介质中，采用原子吸收光谱法连续测定钼精矿、钼焙砂中杂质元素。在选定的最佳工作条件下测定钴、镍、镁、铜、钙，回收率为95．0-106．4％，相对偏差为1.3-5.8％。该法准确、快速、简便，应用于钼精矿、钼焙砂中钴、镍、镁、铜、钙的测定，结果满意。     

镍钴铁体系中常量镍的测定

研究了大量钴、铁中的镍的测定方法。在一定条件下，将二价钴氧化为三价钴，再掩蔽铁，一次沉淀分离测定镍。方法的回收率为99．05％～100．26％，RSD为0．62％～1．66％。     

氢化物发生——原子荧光光谱法测定镍精矿、钴硫精矿中汞量

试样经王水分解，试液控制一定的硝酸酸度，用硝酸铁作为掩蔽剂，硼氢化钾作为还原剂，采用氢化物发生——原子荧光光谱法可直接测定镍精矿、钴硫精矿中0．0001％～0．050％的汞含量。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

Shijiazhuang will Build the World's Biggest Replacingcopper-with-aluminum Cable Production Base

正Shijiazhuang City will build the world’s biggest replacing-copper-with-aluminum cable production base,the annual output value can reach 100 billion yuan,in the future it will develop replacing-copper-with-aluminum highend industry cluster.This piece of news was learned by the reporter at the Rare Earth highiron Aluminum Alloy[Nonferrous Business Opportunity:Aluminum alloy door]Cable Conductor New Technology Application Seminar held at the provincial capital.     

Chongqing is Preparing to Set Up Nonferrous Metal Exchange,in a Bid to Become the Transit Place of Kazakhstan Copper

正Since the beginning of Chongqing’s upgrading to a municipality directly under the Central Government,Chongqing City has established direct friendly relationship with Almaty,Kazakhstan,and carried out a series of cooperation in commerce and trade,and culture     

Guangxi Baise Extends Industrial Chain to Combat Loss in Aluminum Business

正"For each tonne of aluminum being produced,the upstream enterprise on the aluminum industrial chain will suffer loss about 2000yuan."Said Liang Xiao,Deputy Director of Pingguo Industrial Park Management Committee under the Guangxi Baise City,one of the four major aluminum industry bases in China,on August 11.Extending aluminum     

JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL ANNUAL CONTENTS Volume 21(2014)

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Chinalco Straightened Out Copper Assets,and Delegated Stock Equity of Yunnan Copper

正Immediately after the news that Chinalco transferred 58%stock equity of Yunnan Copper Group to its wholly-owned subsidiary China Copper Corporation Limited free of charge was disclosed on July 9,many individual investors couldn’t help but to think:Does it mean China Copper Corporation Limited will assemble assets for overall listing?At present,among main copper business companies under China Copper Corporation     

The Development and Reform Commission Encourages Private Capital to Enter Geological Prospecting Field

正At the press conference recently held by the National Development and Reform Commission under the theme"Deepen Reform in Investment AuditApproval System",when answering questions from reporters,Huang Min,Director of the Department of Fixed Assets Investment of the National Development and Reform Commission,said that in the future it would continue to intensify efforts in geological prospecting,and actively guide social capital to enter this field.     

Guangxi's first Nickel Industry Development Research Report Was Released

正Recently,Guangxi Metallurgical Research Institute,a subsidiary of Guangxi Nonferrous Metals Group,completed survey on laterite and related manufacturers in the region,by combining the current development status of laterite both at home and abroad,it compiled Guangxi’s first"Research Report on the Development of Guangxi Nickel Industrial Chain"which adopted laterite as the study subject.This report expounded on the current     

China’s Major Non-ferrous Metals Imports & Exports(End of September. 2014)

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China's Major Non-ferrous Metals Imports & Exports

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