对甲基二溴偶氮胂直接光度法测定微量锆

本文研究了锆与新试剂对甲基二溴偶氮胂（ＤＢＭＡ）的显色反应。在０,８ｍｏｌ／Ｌ盐酸介质中,锆与该试剂形成蓝色配合物,它的最大吸收波长为６３８ｎｍ,表观摩尔吸光系数为５．２×１０￣４Ｌ．ｍｏｌ￣（－１）·ｃｍ￣（－１）,锆浓度在０～２０μｇ／２５ｍｌ时服从比尔定律。方法用于测定铝、镁、铜等合金中的锆,获得满意结果。     

5—（2—噻唑）偶氮—8—氨基喹啉的合成及光度法测定微量钴

合成了新试剂５－（２－噻唑）偶氮－８－氨基喹啉，测定了它的酸离解常数，并用于光度法测定微量钴。在ＣＴＭＡＢ存在下，０．０４－０．０２ｍｏｌ／ｌ ＮａＯＨ介质中，ＴＡＡＱ与Ｃｏ＾２＋形成１：３的深蓝色络合物，最大吸收峰位于６３０ｎｍ，摩尔吸光系数ε＝１．２３×１０＾５ｌ·ｍｏｌ＾－１·ｃｍ＾－１。Ｃｏ＾２＋在０－１０μｇ／２５ｍｌ范围内符合比尔定律。方法具有较好的选择性，已用于ＶＢ１２及矿石分析，结     

铁（Ⅱ）－1－（2－吡啶偶氮）－2－萘酚－TritonX－100显色体系的研究及应用

本文研究了ＴｒｉｔｏｎＸ一１００存在下，铁（Ⅱ）与１－（２－吡啶偶氮）－２－萘酚（ＰＡＮ）的显色反应，在ＰＨ值３．０～９．０范围内，配合物的最大吸收波长为７４０ｎｍ，表现摩尔吸光系数ε＝１．６×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），铁量在０～８０ｕｇ／２５ｍｌ范围内遵守比耳定律。该法用于纯铝、铝合金、铝基稀土合金中微量铁的测定，结果准确。     

铅电解液中微量锑,铋的双波长分光光度法连续测定研究

本文是对碘化钾光光度法连续测定微量锑,铋的改进研究。根据试验结果,在聚 烯醇存在下,锑、铋的最大吸收波长分别为４２５ｎｍ和４６５ｎｍ,表明摩尔吸光系数分别是４．０８&;#215;１０＾３Ｌ&;#183;ｍｏｌ＾－１&;#183;ｃｍ＾－１和１．１９&;#215;１０＾４&;#183;ｍｏｌ＾－１&;#183;ｃｍ＾－１,锑、铋的线性范围分别是０￣３６０μｇ／２５ｍＬ和０￣３００μｇ／２５ｍＬ。在硫脲和硫氰酸钾共同存在下,直接测定铜电解液中微量的锑、铋,获得令人满意结果     

二安替比林基—对—氯苯基甲烷与铬（Ⅵ）的显色反应研究

合成了二安替比林基－对－氯苯基甲烷的新试剂，研究了它与铬的显色反应，在Ｍｎ（Ⅱ）和磷酸存在下，ＤＡＰＣＭ与Ｃｒ（Ⅱ）反应生成橙红色产物，λｍａｘ为４８５ｎｍ，ε为１．７×１０＾５Ｌ．ｍｏｌ＾－１·ｃｍ＾－１。Ｃｒ（Ⅵ）量在０￣８μｇ／２５ｍＬ间符合比尔定律。用于电镀废液和天然水中微量铬（ＶＩ）的测定，结果满意。     

5-(5-硝基-2-吡啶偶氮)-2,4-二氨基甲苯分光光度法测定微量铱(Ⅲ)的研究

研究了用新试剂５－（５－硝基－２－吡啶偶氮）－２，４－二氨基甲苯（５－ＮＯ２－ＰＡＤＡＴ）分光光度法测定微量铱（Ⅲ）的适宜条件。结果表明，在ｐＨ５．０－６．４的ＮａＡｃ－ＨＡｃ缓冲溶液中，５－Ｎ０２－ＰＡＤＡＴ与Ｉｒ（Ⅲ）反应生成稳定的络合物。在０．１２ｍｏｌ／ＬＨ２ＳＯ４溶液中其最大吸收波长，表现摩尔吸光系数铱浓度在０－０．７ｕｇ／ｍｌ范围内遵守比尔定律。以ＤＣＴＡ为掩蔽剂。大量的常见金属离子对测定无干扰，方法灵敏度高，选择性好，用于催化剂中微量铱的测定，结果满意。     

二溴甲基偶氮羧胂直接光度法测定富钙材料中的稀土

二溴甲基偶氮羧胂在０．１６－０．６ｍｏｌ／Ｌ的盐酸介质中能与铈组形成蓝色的配合物，摩尔吸光系ε６３０（Ｌａ－Ｇｄ）为（１．２５－１．４１）×１０＾５Ｌ．ｍｏｌ＾－１ｃｍ＾－１。铈在０－１２μｇ－２５ｍＬ符合比耳定律。由于乙醇和表面活性剂ｔｒｉｔｏｎＸ－１００的存在，方法具有良好的选择性，４０ｍｇＣａ＾２＋，１０ｍｇＦｅ＾３＋，３ｍｇＴｉ＾４＋不干扰测定。本法用来测定富钙材料中的铈组稀土，结果令人满     

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。     

金的高灵敏显色反映及其应用

利用非离子表面活性剂吐温８０（Ｔｗｅｅｎ８０）对Ａｕ一ＴＥＤＡＴ（４，４′一四乙基二胺二苯甲硫酮，４，４′一Ｔｅｔｒａｅｔｈｙｌｄｉａｍｉｎｏｔｈｉｏｂｅｎｚｏｐｈｅｎｏｎｅ）配合物的胶束增溶增敏作用，进行高灵敏度光度法测定金。研究了Ａｕ一ＴＥＤＡＴ一Ｔｗｅｅｎ８０）混合体系的显色反应条件，显色反应最佳酸度为ｐＨ４．０～６．０，显色体系的最大波长λ＿（ｍａｘ）＝５５６ｎｍ，摩尔吸光系数Σ＿（５５６）＝２．５６×１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）。金量在０～２５ｕｇ／５０ｍＬ范围内，服从朗伯一比尔定律．本法测定金，不受共存金属离子的干扰，可用于测定矿石、金矿中微量金。     

一次萃取钼蓝法测定锡青铜,黄铜,电解铜中的磷

在酸性溶液中用正丁醇、三氯甲烷混合液一次萃取后，以氯化亚锡还原成磷钼蓝进行比色测定。该法的表观摩尔吸光系数为２．２×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，在０￣２５μｇ／２５ｍｌ范围内符合比尔定律，对锡青铜、黄铜、电解铜中磷含量在０．０００ｘ～０．３５％的试样分析结果满意，共存杂质元素不干扰磷的测定。     

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。     

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.