8-氨基喹啉新衍生物的合成及其与铜的荧光反应研究

合成了三种８－氨基喹啉偶氮衍生物。对试剂５－（２－胂酸基苯偶氮）－８－氨基喹啉（ｏ－ＡＰＡＱ）与铜（Ⅱ）的荧光反应进行了较为详细的研究,试剂与铜在 ｐＨ７．２～ ８．８的水介质中形成淡黄色络合物,在λ_(ｅｍ)／λ_(ｅｘ)＝３８０ｎｍ／２８４ｎｍ处产生强荧光。建立了一个灵敏和选择性好的荧光分析新方法,线性范围在０～１５ｎｇ／ｍＬ,检测限为０．０４ｎｇ／ｍＬ,所拟方法准确、方便,用于混合样品中铜（Ⅱ）的测定,结果满意．     

催化动力学光度法测定良量铜

在ｐＨ４．６的乙酸－乙酸钠缓冲介质中，铜（Ⅱ）与过氧化氢氧化橙黄Ⅳ的褪色反应具有强烈催化作用，由此提出了催化动力学光度法测定的良量铜的新方法。铜（Ⅱ）的检测下限为１．０７&;#215;１０＾－１０ｇ／ｍＬ，线性范围为０．０１７￣７ｎｇ／ｍＬ。用于自来水样、血清样中良理铜的测定，结果满意。     

用三碘化物-十六烷基吡啶氯化物胶团体系动力学测定W(Ⅵ)

伊朗使用了三碘化物离子与十六烷基吡啶氯化物（ＣＰＣ）胶团形成的共生体,靠其对酸性介质中碘化物被Ｈ２Ｏ２氧化的催化活化来强化Ｗ（Ⅵ）的动力学分光光度测定。用分光光度法监测反应,方法是在５２５ｎｍ处,从反应开始后３ｍｉｎ内,测定出Ｉ－３－ＣＰＣ共生体的吸光度增大。胶团介质可以测定浓度在４～９０ｎｇ／ｍＬＷ（Ⅵ）,检测限为２．４ｎｇ／ｍＬ。对于Ｗ（Ⅵ）＞６．６ｎｇ／ｍＬ的９次重复分析,其相对标准偏差为０．０３％。本法被用于测定未预先分离的土壤样品提取水溶液中的Ｗ（Ⅵ）。用三碘化物-十六烷基吡啶氯化物胶…     

2－（2－苯并噻唑偶氮）－5－磺丙氨基苯酚高效液相色谱法测定钢中钒、钴和镍

在ＫＩＯ_４存在下,研究了２－（２－苯并噻唑偶氮）－５－磺丙氨基苯酚（ＢＴＡＳＰＡＰ）与Ｖ（Ⅴ）,Ｃｏ（Ⅱ）和Ｎｉ（Ⅱ）形成稳定络合物的反应,在Ｃｌ８柱上,以含０．２ｍｏｌ／Ｌ的乙酸－乙酸钠缓冲溶液（ｐＨ３．５）和１．０×１０－３ｍｏｌ／Ｌ,溴化四丁基铵的乙腈－丙酮－水（３６＋１＋６３）为流动相洗脱液,在５６５ｎｍ处检测。Ｖ（Ⅴ）,ＣＤ（Ⅱ）和Ｎｉ（Ⅱ）的络合物在６ｍｉｎ内获得完全分离,检测限分别为１５．０ｎｇ／ｍｌ,１５．０ｎｇ／ｍｌ和４０．０ｍｇ／ｍｌ．该方法已用于合金钢中钒、钴和镍的测定。     

络合吸附波测定锌及氧化锌中痕量镉

研究了镉（ Ⅱ） － 碘化钾－ 吐温－ ２０ 吸附波的极谱测定条件,加入吐温－ ２０ 可使峰电流提高１ ．１ 倍,其峰电位为－ ０ ．７２ Ｖ（ｖｓ ． Ｓ Ｃ Ｅ） ,镉（ Ⅱ） 浓度在４ ～３００ ｎｇ／ ｍ Ｌ 范围内与峰电流成线性关系,可用于直接测定锌及氧化锌中痕量镉,方法简便、准确,选择性和稳定性好,相对标准偏差≤２ ％ ,回收率在９８ ％ ～１０２ ％ 。     

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。     

壳聚糖柱富集-离子对高效液相色谱分离测定海水中镍、锌、铜

研究了用壳聚糖作富集柱,以二甲酚橙为柱前衍生试剂,六次甲基四胺为离子对试剂,高效液相色谱－光度法快速分离测定痕量Ｎｉ２＋,Ｚｕ２＋,Ｃｕ２＋的新方法。络合物和试剂在８ｍｉｎ内出峰完毕,于５７５ｎｍ处检测,检出限（ｎｇ／ｍｌ）：Ｎｉ０．０２５,Ｚｎ０．０００３,Ｃｕ０．０３３。     

催化光度新体系测定锰的研究

研究了碱性介质中锰（Ⅱ）对溴酸钾氧化苯基荧光酮的催化反应,建立了催化光度法测定锰的新方法．讨论了最佳测定条件,检出限为１．３×１０－１１ｇ／ｍＬ．在０．１～１．７ｎｇ／ｍＬ范围内,锰（Ⅱ）与１ｇ（Ａ０／Ａ）有良好线性关系,采用抗坏血酸终止反应．不经分离直接用于茶叶及人发中锰的测定,结果满意．     

原子吸收光谱法测定高纯稀土中的微量铜

应用钨丝灯和原子吸收分光光度计（ＡＡＳ）对胡椒基荧光酮（ＰＩＦ）与铜的显色反应进行了研究。结果表明：在ｐＨ５．８～６．６的六次甲基四胺－ＨＣｌ缓冲介质中和十六烷基三甲基溴化铵存在下,Ｃｕ＾２＋与ＰＩＦ形成稳定的１：２的蓝紫色配合物。其最大吸收峰为５８５ｎｍ,负峰为５２５ｎｍ。正负峰吸光度绝对值之和与Ｃｕ＾２＋浓度线性相关,铜的质量浓度在０～０．２μｇ．ｍＬ＾－１范围内符合比耳定律,表观摩尔吸光系数     

N-癸基-N′-(对氨基苯磺酸钠)硫脲与铜(Ⅱ)的显色反应及其分析应用

研究了水溶性光度试剂Ｎ－癸基－Ｎ’－（对氨基苯磺酸钠）硫脲（ＤＰＴ）与铜（Ⅱ）的显色反应条件。结果表明,在ｐＨ４.８～５．２的ＨＡｃ－ＮａＡｃ介质中,Ｃｕ（Ⅱ）与ＤＰＴ形成稳定的摩尔比为１：３蓝色络合物;工作曲线的线性范围在５～３０μｇ／２５ｍＬ和３０～６５μｇ／２５ｍＬ,相关系数分别为０．９９９１和０．９９８７,摩尔吸光系数分别为５．８１×１０~４和３．１×１０~４．最大吸收波长为３３６．６ｎｍ。当有Ｆｅ~(３＋)存在时,加ＮａＦ掩蔽。本方法操作简便,快速,选择性较好。用于铅矿中铜含量测定,所得结果及回     

Acceleration of Electricity Reform Brings Benefit to Big Electricity Users,Aluminum Manufacturers Can Save Costs Up to Several Hundred Million

<正>Recently the National Commission of Development and Reform again assembled experts to solicit opinions,and discussed new electricity reform program.According to information disclosed by experts attending the meeting,in the future electricity reform will undergo top-down design,possibly a     

Qinghai's Aluminum Processing Capacity to Rise at the End of the Year

正Since the release of Implementation Opinions on Carrying out‘Guiding Opinions of the State Council on Resolving Serious Production Overcapacity Conflicts’,according to the actual situation of industry,Qinghai has focused on electrolytic aluminum,cement,ironsteel(including iron alloy and silicon carbide),     

Recent Trends in China's Copper Scrap Market-Part Ⅱ

<正>2.Tianjin Scrap Metal Market In Tianjin,we mainly visited Jinghai Ziy Town scrap market and Binhai New Area’some copper scrap enterprises and enterprise using copper scrap.In Ziya we felt the coppe scrap market was particularly deserted,mos copper scrap enterprises in the town wer closed,industry insiders said in 2012 the plac here was bustling with activity.According to     

Shanghai Clearing House to Roll out Renminbi-denominated Copper Clearing Operations in Free Trade Zone

正Clearing House Financial Markets Co.,Ltd.(Shanghai Clearing House)General Manager Xie Zhong told the media recently at the briefing of the international symposium of"Reform Deepening and Mechanism Innovation of the Post-crisis Kerb Market",Shanghai Clearing House will explore the feasibility of carrying out bond business in     

Development and Application of New Materials for Copper Processing in China

正After over 60 years of developmnt,a system for RD and production of copper processing materials has already taken shape in China.After the reform and opening-up,the application of copper processing materials has gradually expanded from the military industry to civil field.The annual output of copper     

China’s Mineral Exploration Market Downturn Causes Decline of Investment in Bauxite

<正>According to a survey report conducted recently by China Geological Survey Development Research Center,in the first half of 2014,China’s mineral exploration market continued to decline,with the investment in exploration of non-fuel minerals dropping by13.7%and drilling workload dropping by21.7%.According to statistical analysis of the Center,     

Fabricated Copper Production by Province or City in 2014

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Zinc Production by Province in 2014

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China's Aluminum Alloy Cable Market has Taken Shape

正Aluminum alloy cable is a mature product and technology that has been used for nearly fifty years in the U.S.Through six years’promotion,it has been widely recognized and accepted in the China market since 2013,which laid the foundation for the development of the aluminum alloy cable market.Aluminum alloy cable is widely applied in the fields of civil construction and industrial and mining enterprises,especially in real estate,steel and metallurgy.     

Qinghai to Build a 100 Billion Yuan Lithium Industry Base

正At 2014 China Qinghai Trade Fair for Green Development Investment,Qinghai EV Rally2014 was introduced for the first time.With electrical vehicles’eco-friendly features,Qinghai manifested its determination on green development.Introducing Qinghai EV Rally was just a signal.By leveraging its rich salt lake resources