涂层石墨管原子吸收法测定水中痕量铍

比较了多种涂层金属和基体改进剂对测定水中铍的影响，建立了涂镧石墨管结合基体改进剂（磷酸二氢铵）测定水中痕量铍的方法。该方法最低检出限为０．０３７μｇ／Ｌ，相对标准偏差为７．４％，回收率为９８％～１０６％。     

氟化钙增敏石墨炉原子吸收法测定钢中钼

本文考查了一些试剂对石墨炉原子吸收测定痕量钼的增敏作用，确定了用氟化钙作为石墨炉原子吸收光谱法测定钼的基体改进剂，并选择了该体系测定钢中钼的最佳实验条件。实验证明，采用ＣａＦ２作基体改进剂，使钼在３１３．３ｎｍ处的原子吸光度提高了５．７倍，特征景由原来４２×１０－１１ｇ／１％提高到５１×１０－１２ｇ／１％。线性范围为０～１０００ｎｇ／ｍｌ钼，检测下限为０．５５ｎｇ／ｇ。对钼含量为０．０××～×．××％的钢标样测定结果满意。     

石墨炉原子吸收法测定钢铁中的锡

本文报导石墨炉原子吸收法测定钢铁中锡的方法,试验了各元素对锡信号的影响,选用柠檬酸为基体改进剂,并以铁打底的溶液绘制工作曲线来测定样品。对三种标样的分析获得准确结果。     

用石墨炉原子吸收光谱法测定妊娠血清中的痕量钼

运用ＧＦＡＡＳ法加基体改进技术，测定孕妇血清中钼的含量。使用热解涂层石墨管，ＣａＦ２作基体改进剂，灰化阶段增加降温程序（日立１８０８０无光控设备）。血清用体积分数为０．３％的ＴｒｉｔｏｎＸ１００（内含体积分数１．６％的硝酸、硝酸铵、硝酸镍）稀释，测定精度可与火焰法媲美。特征含量２０ｐｇ；检出限４６ｐｇ（Ｋ＝３）；线性范围０～２０μｇ／Ｌ；相对标准偏差（ｎ＝１１）３．４％；加标回收率９２．５％～１２５％。方法可靠，结果满意。     

用8—羟基喹淋盐络合物安培检测FIA法测定无机锡（Ⅱ）

发展了一种基于锡（Ⅱ）与８－羟基喹啉生成络合物，用流动喷射分析法测定微量锡（Ⅱ）的高度选择、快速和直接的安培法。８－羟基喹啉会加速锡（Ⅱ）电氧化作用；在０．１ｍｏｌｌ＾－１醋酸盐缓冲液中（ＰＨ６），采用玻璃电极时，在＋０．０５Ｖ出现氧化峰。在０．２５－２０μｍｏｌｌ＾－１范围内，获得了峰民极与锡（Ⅱ）浓度的线线性关系。检测限为０．１μｍｏｌｌ＾－１锡（Ⅱ）溶液计得的相对标准偏差为５％（ｎ＝２０）。     

锡（Ⅳ）—水杨基荧光酮－CTMAB光度法测定电铅中的微量锡

拟订了以水杨基荧光酮为显色剂，在０．３～０．７ｍｏｌ／ＬＨ＿２ＳＯ＿４介质中，ＣＴＭＡＢ存在下测定电铅中微量锡的方法。０～１０μｇ锡／２５ｍｌ符合比尔定律，ε５１０＝１．３６×１０￣５。本法快速准确，可测定０．０Ｘ～０．０００Ｘ％的锡。     

粗铅精炼过程中除锡的研究

本文就沈阳冶炼厂粗铅原料在电解精炼中析出铅含锡过高，严重影响电铅产品质量问题，进行了析出铅熔化过程中除锡的研究，研究确定了最佳氢氧化钠用量、搅拌时间、搅拌温度等技术条件，使电铅产品含锡由０．００５～０．００７％下降到０．０００１％，除锡效率达９８．３３％     

锡青铜中痕量磷的测定─—钼蓝萃取光度法

在盐酸介质中，以正丁醇、氯仿对锡青铜中微量磷进行钼蓝萃取，用分光光度法测量磷含量。磷含量为０．００５５％时，绝对误差为０．０００３。     

锡青铜中痕量磷的测定——钼蓝萃取光度法

在盐酸介质中，以正丁醇、氯仿对锡青铜中微量磷进行钼蓝萃取，用分光光度法测量磷含量磷含量为０．００５５％时，绝对误差为０．０００３。     

粗铅氧化脱锡生产1号铅的探讨

粗铅氧化脱锡生产１号铅的探讨云锡第一冶炼厂马存安１前言本厂粗铅自用有余，积压上千吨，滞留资金５００多万元，如何将粗铅中的锡由０．３％～０．５％除至０．００１％，直接产１号铅，是这次试验性生产的宗旨。２粗铅氧化脱锡原理氧化法基于锡对氧的自由能比铅大，氧...     

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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