阳离子型微乳液介质中铜（Ⅱ）－苯基荧光酮的增敏试验

研究了在阳离子型微乳液介质中,用苯基荧光酮测定铜（Ⅱ）的分光光度试验。结果表明,以阳离子型ＣＴＭＡＢ－ｎ－Ｃ＿５Ｈ＿（１１）ＯＨ－ｎ－Ｃ＿７Ｈ＿１６－Ｈ＿２Ｏ微乳液为介质,Ｃｕ（Ⅱ）－ＰＦ的ε＿（５７２）＝１．３７×１０￣５,与以水为介质ε＿（５４０）＝４．３×１０￣４及相同含量ＣＴＭＡＢ胶束溶液为介质ε＿（５７２）＝８．９×１０￣４比较,测定灵敏度显著提高,并且某些实验条件更加宽容。经投入使用,结果满意。     

新试剂2－（5－硝基－2－吡啶偶氮）－5－二甲氨基苯甲酸分光光度法测定微量铜

本文报道用新试剂２－（５－硝基－２－吡啶偶氮）－５－二甲氨基苯甲酸（５－ＮＯ,－ＰＡＭＢ）分光光度法测定微量铜。试剂与铜离子反应迅速,水溶性很好。配合物的表现摩尔吸光系数为８．０４×１０￣４络合比Ｃｕ：Ｓ－Ｎｏ＿２－ＰＡＭＢ＝１：２,Ｃｕ￣２＋浓度在０～２５μｇ／２５ｍｌ范围内服从比尔定律。方法应用于测定铝合金标样及金属铝中的铜,结果与标准值相符,标准加入回收率在９８％～１０２％之间。     

阳离子型微乳液介质中铜（Ⅱ）──苯基荧光酮的增敏试验

本文研究了在阳离子型微乳液介质中，用苯基荧光酮测定铜（Ⅱ）的吸光光度法。试验结果表明，以阳离子型Ｏ／ＷＣＴＭＡＢ／ｎ—Ｃ５Ｈ１１ＯＨ／ｎ—Ｃ７Ｈ１６／Ｈ２Ｏ微乳液为介质，Ｃｕ（Ⅱ）－ＰＦ的ε５７２＝１．３７×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，与以水为为介质ε５４０＝４．３×１０４Ｌ·ｍｏｌ－１·ｃｍ－１及相同含量ＣＴＭＡＢ０／Ｗ胶束溶液为介质ε５７２＝８．９×１０４Ｌ·ｍｏｌ－１·ｃｍ－１比较，测定灵敏度显著提高，并且某些实验条件更加宽容。经投入使用，结果令人满意。     

聚乙二醇-新铜试剂-硫酸铵萃取光度法测定铜

研究了Ｃｕ（Ⅱ）－ＰＥＧ（聚乙二醇－２０００）－ＢＣＯ（新铜试剂）－（ＮＨ４）２ＳＯ４体系的萃取光度法并应用于测定Ｃｕ（Ⅱ）。结果表明最适宜酸度为ｐＨ８～９．５（ＮＨ４Ｃｌ－ＮＨ３·Ｈ２Ｏ缓冲溶液）,络合物最大吸收波长位于６００ｎｍ,表观摩尔吸光系数为２．７４×１０４,Ｃｕ（Ⅱ）浓度在０～６４μｇ／１０ｍｌ服从比尔定律,铜与ＢＣＯ组成了１：３的稳定蓝色络合物。该方法用于铝合金中铜的测定,获得了满意的结果。     

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     

2－（2－苯并噻唑偶氮）－5－二乙氨基苯甲酸－TritonX－100双波长分光光度法测定铜（Ⅱ）的研究

本文研究了２－（２－苯并噻唑偶氮）－５－二乙氨基苯甲酸（ＢＴＡＥＢ）－ＴｒｉｔｏｎＸ－１００测定铜（Ⅱ）的显色反应。在ｐＨ３．８～５．５的ＨＡｃ－ＮａＡｃ缓冲介质和ＴｒｉｔｏｎＸ－１００存在下,Ｃｕ（Ⅱ）与ＢＴＡＥＢ形成稳定的１∶２蓝紫色配合物,λ＿（ｍａｘ）在６５４ｎｍ处,铜量在０～ｍμｇ／２５ｍｌ范围内符合比尔定律,用单波长法测得的ε＿（６５４）为５．７×１０￣４,双波长光度法测得的ε＿（６５４,５３２）值达９．６２×１０￣４。方法灵敏、稳定,有良好的选择性,用于铝合金中微量铜的测定,结果满意。     

在CTMAB存在下水杨基荧光酮与碲（Ⅳ）的显色反应研究

研究了在ＣＴＭＡＢ微乳液存在下， ｐＨ为４－８ 的ＨＡＣ－ ＮａＡＣ缓冲介质中， Ｔｅ （ Ⅳ） 与水杨基荧光酮形成１∶４ 稳定配合物， λｍａｘ＝ ５３５ ｎｍ ， ε＝ １－８７×１０４Ｌ·ｍｏＬ－ １·ｃｍ － １ ， Ｔｅ （ Ⅵ） 含量在０ ～８ μｇ／２５ｍＬ内符合比尔定律， 方法用于硒矿石中痕量碲的测定， 结果满意。     

光度-折光法研究铜(Ⅱ)、铬(Ⅲ)与乙酸根的配合物

在ｐＨ５．２左右的水溶液中,Ｃｕ与乙酸根（Ａｃ）可形成１：４型蓝绿色配合物,其与Ａｃ－形成１：６型紫色配合物,其溶液中ＣｕＡｃ,Ｃｕ（Ａｌ）２,Ｃｕ（Ａｃ）,Ｃｕ（Ａｃ）四级配离子的累积稳定常数β＝１．４１ｘ１０７（ｕ＝０．１,ＮａＣｌＯ４,２２℃）：溶液中ＣｒＡｃ,Ｃｒ（Ａｃ）,Ｃｒ（Ａｃ）３,Ｃｒ（Ａｃ）,Ｃｒ（Ａｃ）５,Ｃｒ（Ａｃ）６六级配离子的累积稳定常数β６＝１．８８ｘ１０１１（ｕ＝０．１,ＮａＣｌ４,２５℃）。     

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。     

二安替比林间氯苯基甲烷光度法测定锰的研究

在碱性介质中,空气将Ｍｎ（Ⅱ）氧化成Ｍｎ（Ⅳ）。在酸性介质中,庄阳离子型Ｏ／Ｗ（ＴＭＡＢｎ－Ｃ＿５Ｈ＿（１１）ＯＨ／ｎ－Ｃ＿７Ｈ＿（１６）／Ｈ＿２Ｏ存在下,Ｍｎ（Ⅳ）将二安替比林间氯苯基甲烷（ＤＡｍＣＭ）氧化成橙红色产物,λ＿（ｍａｘ）＝４７８ｍｎ,ε＝８．１×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）锰量在０～３０μｇ／２５ｍｌ范围内符合比尔定律,用于钢铁中锰的测定,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.