三羟基荧光酮类试剂电化学行为的研究：Ⅰ.镓（Ⅲ）,铟（Ⅲ）与对氨基苯基荧光？

在ＨＣ１－ＫＣ１和聚乙烯醇介质中，用单扫示波极谱法得到了两个灵敏的镓（Ⅲ），铟（Ⅲ）和对氨基苛基荧光酮配合物的吸附波。两波的峰电位依次为－１．９Ｖ和－０．６５Ｖ（ｕｓ．ＳＣＥ），线性范围：镓（Ⅲ）０．００８－０．６μｇ／ｍｌ，而铟（Ⅲ）０．００１－０．３μｇ／ｍｌ。用于矿石中镓和铟的直接测定，结果满意。文中还探讨了有关反应机理。     

三羟基荧光酮类试剂电化学行为的研究Ⅰ．镓（Ⅲ）、铟（Ⅲ）与对氨基苯基荧光酮配合物的极谱行为及镓和铟的同时测定

在ＨＣｌ－Ｋｃｌ和聚乙烯醇介质中,用单扫示波极谱法得到了两个灵敏的镓（Ⅲ）、铟（Ⅲ）和对氨基苯基荧光酮配合物的吸附波。两波的峰电位依次为－１．０Ｖ和－０．６５Ｖ（ｖｓ．ＳＣＥ）,线性范围：镓（Ⅲ）０．００８～０．６μｇ／ｍｌ,而铟（Ⅲ）０．００１～０．３μｇ／ｍｌ。用于矿石中镓和铟的直接测定,结果满意。文中还探讨了有关反应机理。     

速差动力学光度法同时测定微量钼和钛的研究

根据ＭＯ（Ⅵ）和Ｔｉ（Ⅳ）在酸性介质中与水杨基荧光酮（ＳＡＦ）及溴化十六烷基三甲基铵（ＣＴＭＡＢ）形成三元缔合物的速度差异，建立了两者同时测定的速差动力学光度法。本法测定钼和钛的线性范围分别为５．０～２０μｇ／２５ｍｌ和１．５～９．０μｇ／２５ｍｌ，且两者浓度之比在Ｍｏ／Ｔｉ为０．８３～６．７之间时可得较满意的结果。测定了模拟样品中钼和钛的含量，其加标回收率分别为９８．２％～１０４％和９２．０％～１０８％。     

催化动力学光度法测定痕量铁(Ⅲ)的研究

研究了在Ｈ２ＳＯ４介质中,Ｆｅ（Ⅲ）催化Ｈ２Ｏ２氧化偶氮胂Ｍ的褪色反应的动力学条件,建立了催化动力学光度法测定痕量铁的新方法。方法的线性范围为０～２．２μｇ／２５ｍｌ,检测限为１．９×１０－１０ｇ／ｍｌ。在用于测定分析纯盐酸和硝权中的痕量铁时,结果满意。     

原子吸收测定铜渣中铅量

提出的５％的盐酸介质中，采用火焰原子吸收于２８３．３ｎｍ处测定铜渣中的铅量，方法快速稳定，干扰少，铅在１．０μｇ／ｍｌ－５０μｇ／ｍｌ浓度范围内线性良好。     

镧对火焰原子发射光谱法测定镱的增感效应与应用

研究了盐酸、硝酸、高氯酸介质中，稀土元素钕、钇、镧、铕、钐对空气─乙炔焰原子发射光谱法测定镱的影响。提出了１％ＨＣｌＯ４介质中，以１０００μｇＬａ／ｍｌ作为增感试剂测定Ｙｂ的方法。方法选择性好，非镱稀土及非稀土元素允许存在量高。本方法测定Ｙｂ的线性范围为０～２０μｇ／ｍｌ，检测限为０．１４μｇ／ｍｌ。应用测定富钇混合氧化稀土浓集物中的Ｙｂ和Ｙ２Ｏ３粗产品中的Ｙｂ，获得满意的结果。     

溴酸钾氧化甲基绿催化光度法测定痕量钯

研究了稀硫酸介质中痕量Ｐｄ（Ⅱ）催化溴酸钾氧化甲基绿的褪色反应及动力学条件，建立了高灵敏度测定痕量Ｐｄ（Ⅱ）的新催化光度法。方法的灵敏度为５６７×１０－１２ｇ／ｍｌ，线性范围为０～０１μｇ／２５ｍｌ。用于测定矿石中的痕量钯，结果较好。     

火焰原子化器的设计改进

本文介绍一种改进的火焰原子化器。所组装的这种原子化器的原子吸收光谱仪在Ｎ２Ｏ－Ｃ２Ｈ２火焰中测得Ｓｉ和Ｖ的特征浓度和检出限分别为１．４２μｇ／ｍｌ１％,０．０２８μｇ／ｍｌ和０．９２μｇ／ｍｌ１％,０．０３１μｇ／ｍｌ。这台仪器几年来在原子吸收分析使用,证明其性能良好。     

电流氧化溶出计时电位法直接测定地质物料中微量铅

本文介绍了在０．２ｍｏｌ／ＬＨＮＯ３－０．５ｍｇＦｅ（３＋）－０．１ｍｏｌ／Ｌ抗坏血酸介质中用电流氧化溶出计时电位法直接测定地质物料中微量铅的新方法。方法检出限０．１５μｇ／ｇ，线性范围２～７００ｎｇ／ｍｌ，Ｐｂ的含量水平分别为１１．３和５８．５μｇ／ｇ时的精密度（ＲＳＤ）分别为３．４２％和３．０８％，回收率９５．００％～９８．８％。文中对所选测定体系的增敏机理做了研究，考察了４０种干扰离子对测定Ｐｂ的影响。用本法分析了２６个国家一级标准物质中微量Ｐｂ，结果与标准值一致。     

催化光度法测定环境样品中痕量钒的研究-- K2Cr2O7-偶氮胂Ⅲ指示反应体系

在微酸性介质中痕量Ｖ（Ⅴ）对重铬酸钾氧化偶氮胂Ⅲ褪色的反应有显著的催化作用，催化反应的表观活化能为２１７２ｋＪ·ｍｏｌ－１。据此建立了测定痕量钒的催化动力学分析法。线性测定范围为００２～０２０μｇ·ｍｌ－１，方法检出限为００２μｇ·ｍｌ－１Ｖ。本法重现性较好，用于测定人发、马铃薯、茶叶和废水中钒的含量，结果满意。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.