铱－钼酸盐－罗丹明B缔合显色反应的研究

在聚乙烯醇（ＰＶＡＶＡ）存在下,铱与钼酸盐和罗丹明Ｂ（ＲＢ）形成离了缔合物。缔台物的最大吸收位于５７０ｎｍ摩尔吸光系数ε８．３６×１０￣５’Ｌ·ｍｏｌ￣－１·ｃｍ￣－１,服从比尔定率范围为０～２．７５μｇｌｒ／２５ｍｌ。测定２．０μｇ铱的相对标准偏差为２．５％（ｎ＝７）,检出限４３ｎ／ｍｌ（ｎ＝１２）。测定铱的适宜条件为ＣＨＣｌＯ＿４＝０．９３ｍｏｌ／Ｌ,Ｃ＿ＭｏＯ￣２－＿４９．０×１０～－４ｍｏｌ／Ｌ,Ｃ＿ＲＢ＝３．３×ｌ０￣－５ｍｏｌ／Ｌ,ＰＶＡＯ０８％。试验了３０多种共存离子的影响,除形成杂多酸元素     

碲钨杂多酸——罗丹明B测定痕量碲的研究

利用碲钨杂多酸－罗丹明Ｂ（ＲＢ）－聚乙烯醇体系建立了分光光度测定痕量碲的新方法，确定了测定碲的适宜条件为〔Ｈ２ＳＯ４〕＝１．２０ｍｏｌ／Ｌ，〔ＷＯ２－４〕＝１．２×１０－４ｍｏｌ／Ｌ，〔ＲＢ〕＝５．０×１０－５ｍｏｌ／Ｌ和ＰＶＡ０．０８％。在ＰＶＡ存在下碲钨杂多酸与罗丹明Ｂ形成１∶９的离子缔合物，其最大吸收位于５６５ｎｍ，表观摩尔吸光系数ε＝１．７６×１０７，离子缔合物至少稳定２４０ｈ。测定碲的线性范围为０～０．１６μｇ／２５ｍｌ，对０１２μｇ／２５ｍｌ碲测定的相对标准偏差１．３％（ｎ＝１０）。考察了４０多种共存离子的影响，大多数常见元素不干扰，允许５００倍量Ｓｅ（Ⅳ）；４０倍量Ｃｕ２＋，Ｂｉ３＋存在。本法灵敏度高，重现性和选择好，用于烟尘中碲的测定，结果与电分析法吻合。     

钼酸盐－丁基罗丹明B光度法测定痕量钌

研究了用钼酸盐和丁基罗丹明Ｂ（ＢＲＢ）比色测定实际样品中的钌。离子缔合物的最大吸收位于５７０ｎｍ，摩尔吸光度ε值为１．０１×１０６Ｌ·ｍｏｌ－１·。ｃｍ－１．桑德尔灵敏度０．１１ｎｇｃｍ－２．遵守比耳定律范围０～１．４μｇ／２５ｍｌ，测定极限３．３ｎｇ／ｍｌ（ｍ＝８），标准偏差８．３×１０－４～８．７×１０－３，相对标准偏差０．８％～３．３％。考察了４３种共存离子的容许量。本法已用于某些岩矿和冶金产品中钌的测定。     

钯－钼酸铵－丁基罗丹明B显色反应体系的研究

本文提出了一种新的光度测定论的方法。该方法基于在聚乙烯醇（ＰＶＡ）存在下,钯与钼酸盐和丁基罗丹明Ｂ（ＢＲＢ）反应形成离子缔合物。缔合物的最大吸收位于５８０ｎｍ,摩尔吸光系数ε为３．１４×１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）,钯量在０～４ｕｇ／２５ｍｌ范围内服从比尔定律。缔合物中ｐｄ：ＢＲＢ＝１：４,体系至少可稳定１０ｈ,测定钯的适宜条件是：Ｃ＿（ＨＣＯ４）＝１．６ｍｏｌ／Ｌ,Ｃ＿（ＢＲＢ）＝３．８×１０￣（－５）ｍｏｌ／Ｌ,ＰＶＡ０．０８％。考察了３０多种共存离子的影响。本法用于碳基和铝基催化剂中     

1－（2－羟基－3－甲氧基苯甲醛缩氨基）－8－羟基－3，6－萘二磺酸的合成及其光度法测定硼的研究

本文研究了１－（２－羟基－３－甲氧基苯甲醛缩氨基）－８－羟基－３－,６－萘二磺酸的合成以及光度测定硼的方法。在乙酸－乙酸铁缓冲溶液中,硼与成剂形成１：２的黄色络合物,最大吸收波长在４２０ｎｍ处,摩尔吸光系数为７．１９×１０￣３Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）,Ｂ的Ｓａｎｄｅｌｌ灵敏度为０．００１５μｇ／ｃｍ￣２：。当硼量在０～３５μｇ／２５ｍｌ范围内符合比尔定律,应用于氧化镁中硼的测定获得满意结果。     

钼中痕量硅的测定

用聚乙烯醇（ＰＶＡ）为稳定剂，在高酸度下硅钼蓝与罗丹明Ｂ发生离子缔合显色反应。离子缔合物最大吸收波长为５８７ｎｍ，摩尔吸光系数ε５８７＝１．９×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，硅量在０．３～６．０μｇ／１００ｍＬ范围内服从比尔定律。此法已经应用于测定纯钼、三氧化钼中的痕量硅，结果满意。     

在聚乙烯醇存在下铑（Ⅲ）─钼酸盐─耐尔蓝体系光度法测定铑

本文研究了聚乙烯醇（ＰＶＡ）存在下铑（Ⅲ）─钼酸盐─耐尔蓝（ＮＢ）的显色体系。在高氯酸介质中该体系λ＿ｍａｘ＝５９５ｎｍ,表观摩尔吸光系数ε值为１．８×１０￣５。符合比尔定律范围：０～１０μｇ／２５ｍｌ,缔合物至少稳定３ｈ。考察了３６多种共有离子的影响,大多数离子不干扰。本法已用于某些贵金属物料中铑的测定,结果满意。离子缔合物的摩尔比为Ｒｈ：ＮＢ＝１：４。     

钼酸铵－罗丹明B－聚乙烯醇体系光度法测定钇

研究了在聚乙烯醇存在下钇与钼酸铵形成钇钼杂多酸。该酸与罗丹明Ｂ（ＲＢ）形成离子缔合物,其摩尔比为Ｙ：ＲＢ＝１：２。在实验条件下,显色体系于５９０ｎｍ处有最大吸收,表现摩尔吸光系数ε＝３．５３×１０５,钇量在０～３．５μｇ／２５ｍｌ范围内服从比尔定律,稳定性好,至少稳定６０天以上。考察了４０多种共存离子的影响,大多数元素不干扰。本法已用于某些矿样中钇的测定,结果满意。     

N－烯丙基－N＇－（氨基对苯磺酸钠）硫脲光度法测定微量铜

本文提出了以新合成的试剂Ｎ－烯丙基－Ｎ＇－（氨基对苯磺酸钠）硫脲（ＡＳＡＴｕ）为显色剂,光度法测定微量铜的新方法。在ｐＨ４．０的弱酸性溶液中,铜（Ⅱ）与ＡＳＡＴｕ形成配合物的最大吸收波长为３乙４ｎｍ,表观摩尔吸光系数ε＿（３３４）＝３．４２×１０￣４。铜量在１０～７０μｇ／２５ｍｌ范围内呈线性关系,相关系数ｒ＝０．９９９９。铜（Ⅱ）和ＡＳＡＴｕ配合物的组成比为１∶３。常见离子除Ｆｅ￣（３＋）、Ａｇ￣＋、Ｓ￣（２－）外,均无干扰。该法简单、灵敏度高,选择性好。对合成样品、食品及生物试样的分析和回收实验,均获     

新试剂N-辛基-N’-(氨基对苯磺酸钠)硫脲的合成及其在铜和金分析中的应用

合成了新试剂Ｎ－辛基－Ｎ’－（氨基对苯磺酸钠）硫脲（ＯＰＴ）,经过红外、紫外和元素分析等测试,确定了其组成和结构．并研究测定了试剂与４０多种常见离子的反应及其络合物的表观摩尔吸光系数．表明它可作为Ｃｕ~２＋ （ｍ＝０．０１５μｇ, ｃ＝０．５０μｇ／ｍＬ）, Ａｕ~３＋（ｍ＝０．３０μｇ, ｃ＝１０μｇ／ｍＬ）的新鉴定试剂和光度法测定 Ｃｕ~２＋（ε_３０１．４＝１．８２ Ｘ １０~５和 Ａｎ~３＋（ε_３０２．０＝１．３３ Ｘ １０~５的新显色剂．方法的灵敏度高,选择性好,操作简便．将该法应用于矿石样品     

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.