原子荧光光谱法测定化探样品中微量硒碲

本法采用硝酸分解样品，不经分离富集，以硫脲、浓盐酸作还原剂，三价铁盐为减缓剂，断续流动氢化物发生，原子荧光光谱法测定化探样品中微量Se、Te。本法适用于0.10-2.0ug/g的Se,0.01-0.80μg/g的Te的测定，方法简便快捷，可满足大批化探样品的分析，经国家一级标准物质分析，其结果与推荐值基本一致。     

氯化十六烷基吡啶-乙酸丁酯萃取原子吸收法测定废水中微量银与镉研究

建立了在1．0mol／L HCI介质中，以氯化十六烷基毗啶-乙酸丁酯萃取分离银与镉的新体系，并以有机相喷雾。进行火焰原子吸收法连续测定银与镉。该法简便、快速、灵敏，约30种共存离子对测定体系无干扰，已成功地应用于废水样品中微量银与镉的测定。     

阳极溶出伏安法同时测定锌电解液中微量镉和铅

采用微分脉冲阳极溶出伏安法同时测定锌电解液中微量镉和铅,Cd2+,Pb2+分别在-0.6V和-0.4V左右产生灵敏溶出峰。在选定的最佳实验条件下,通过标准加入法对锌电解液中微量镉和铅进行分析,其相对标准偏差分别为0.6%,0.9%,回收率分别为96.0%～100.4%和96.4%～104.0%,测定结果令人满意。     

高纯阴极铜中微量银的ICP-MS法测定方法研究

研究高纯阴极铜中微量银的ICP—MS直接测定方法，选择仪器的最佳参数和最佳测定条件。通过加入内标^115In，消除基体铜的基体效应对测定银的干扰，测定结果更准确、可靠。方法可准确测定高纯阴极铜样品中0．000x％-0．002x％的银，相对标准偏差为4．52％，加标回收率95．7％-106．7％。该方法已用于高纯阴极铜中微量银的测定，并取得了满意的结果。     

石墨炉原子吸收光度法测定高纯铁红中微量铝

研究了石墨炉原子吸收光度法测定微量铝时盐酸、氯化铁的干扰，试验了多种基体改进剂对铝的测定影响，选定磷酸氢二铵[(NH4）2HPD4]作为测定体系的基体改进剂，采用标准加入法，回收率为94％一109％，相对标准偏差≤10．16％，检出限为0．0080μg/ml(2σ)，测定范围为10^-3-10^-1。     

氢化物发生原子荧光光谱法测定化妆品中的砷、汞

采用HNO3--H2SO4混合酸消化化妆品样品，氢化物发生原子荧光光谱法测定As、Hg，对仪器条件、HCl酸度、共存干扰进行了试验。As的方法检出限为0．0227μg／g，测定精密度0．9％～1．4％，回收率为96．0％～102.7％、Hg的方法检出限为0．171ng／g，测定精密度1．4％～2．0％，回收率为90．0％-105．0％。     

氢化物-原子荧光光谱法测定高纯铅中微量铋的方法研究

研究了高纯铅中微量铋的氢化物 -原子荧光光谱简便、快速测定方法。详细考察了最佳测定条件、干扰情况和干扰消除方法及酸度。结果表明 ,采用硝酸溶解样品 ,蒸至有硝酸铅析出后 ,加入盐酸酸度达 2 0 %时 ,基体铅以氯化铅形式沉淀 ,消除基体铅的影响 ,其它共存离子也不干扰铋的测定。测定铋的检出限 (3σ)为 0 3 2ng/mL。按操作步骤对样品进行分析 ,铋的检出下限可达 0 1μg/g ,样品加标回收率在 97 2 %～ 10 5 0 %之间     

KI掩蔽-EDTA差减滴定法测定工业废水中镉

水样经HNO3和H2SO4消解并用硫脲掩蔽Hg2+后,在pH值为5～6时,以二甲酚橙(XO)为指示剂,用EDTA标准溶液滴定废水中能与EDTA络合的全部金属离子的总量;然后在另一份相同试液中,先加入KI掩蔽Cd2+,再用EDTA标准溶液滴定除镉外的其它金属离子,利用二者之差计算镉的含量,实现了采用KI掩蔽-EDTA差减滴定法测定工业废水中微量镉的方法.讨论了溶液的酸度、掩蔽剂的选择等实验条件及对测定的影响,并利用t检验法进行了显著性检验.测定结果与标准方法相符合,相对标准偏差<1.0%,加标回收率在98.9%～100.3%之间.     

氢化物发生-原子荧光光谱法测定纺织品和皮革中微量铅

采用氢化物发生-原子荧光光谱法测定纺织品和皮革样品中微量的铅,研究了还原剂和催化剂的浓度、测定介质、干扰元素以及仪器操作条件对测定的影响.该方法的检出限为0.19μg/L,相对标准偏差5.09%,回收率在98%～105%之间.     

H2O2—水杨基荧光酮指示反应体系动力学光度法测定痕量锰

在碱性介质中，痕量锰（Ⅱ）能显著催化H2O2氧化水杨基荧光酮的反应。本文据此建立了测定痕量锰的催化动力学分析法，测定条件为：4．0×10－5mol／L水杨基荧光配（SAF）0．012／H2O2，2．4×10-2mol／LNaOH，60℃。线性范围为0．1～2．0μg／L，方法检测限为0.02μg／L。测得反应表现活化能为20．78kJ／mol。测定了土壤、碳素钢及铝合金等样品中锰的含量，结果满意。     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

Brief news

正Corun invested another 50 million yuan in power battery for HEV Hunan Corun announced on 27 June that they had signed the cooperation agreement to jointly built Corun(Shaoxing)Autos Power Battery System Co.,Ltd.in Shaoxing Binhai New City.According to the announcement,total registered     

China rare earth market review

正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent     

China rare earth market review

正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,     

New energy vehicle:an opportunity for rare earth magnets

<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new