钴和镍中微量铁的萃淋树脂分离-分光光度法测定

邻菲啰啉是测定微量铁灵敏且选择性好的显色剂,但是,大量的Co(Ⅱ)、Ni(Ⅱ)和Cu(Ⅱ)有干扰。从分离来说,微量Fe(Ⅲ)与大量Co(Ⅱ)、Ni(Ⅱ)和Cu(Ⅱ)的分离至今尚未见到令人满意的方法。Otto采用甲基异丁基酮在8N盐酸介质萃取Fe(Ⅲ),国内北京有色金属研究总院则采用醋酸异戊酯在8N盐酸介质萃取,由于萃取剂用量较大且盐酸蒸     

二氧化钛中磷的测定(摘要)

二氧化钛中磷的比色测定,有磷钼黄法、磷钼兰法和用有机溶剂萃取钼兰法等,使用的有机溶剂有乙醚、甲基异丁基酮、乙酸乙酯和三氯甲烷—正丁醇等。我们选择了乙醚—甲基异丁基酮(1:1)作萃取剂,它既克服了在乙醚中有色络合物的不稳定性,又克服了甲基异丁酮灵敏度低的缺点。对部分测定条件及干扰情况进行了试验。试验证明:在硝酸介质中,用(1:1)混合萃取剂萃取磷钼黄后,以二氯化锡还原的比色方法是灵敏的稳定的。其实验情况概述如下:     

罗丹明B萃取分光光度法测定黄磷电尘灰冶炼物料中镓

建立了以甲苯-甲基异丁基酮为萃取剂、罗丹明B为显色剂分光光度法测定黄磷电尘灰冶炼物料中镓的方法。试样采用体积分数10%硫酸溶解后,加入三氯化钛还原铁至二价,在6 mol/L盐酸中用甲苯-甲基异丁基酮萃取罗丹明B与镓生成络合物,有机相经硫脲、三氯化钛和罗丹明B溶液洗涤后,在最大吸收波长560 nm测定吸光度,同时采用校正法消除样品分解带来的方法系统误差。镓的质量浓度在0～1.0 μg/mL时,吸光度与浓度呈线性关系,相关系数为0.999。将实验方法与传统溶样方法的测定值进行对照,结果一致。对6个黄磷电尘灰冶炼物料样品中镓进行测定,结果的相对标准偏差小于10%,加标回收率在96%～103%之间。     

β,β′——硫二丙腈络合萃取硫代米蚩酮比色测定金

本文研究了β,β~‘一硫二丙睛为络合剂,甲基异丁基酮(MIBK)为溶剂络合萃取,硫代米蚩酮(TMK)比色测定金的方法,确定了实验条件,并以此方法分析了几组矿样中的金含量.     

溶液中微量甲基异丁基酮的分析方法

研究了微量甲异丁基酮在氟氧铌酸（H2NbOF5)及氟钽酸（H2TaF7)溶液中存在的形式，找到利用碘仿-硫代硫酸钠联合滴定的方法，来标定微量甲基异丁基酮在H2NbOF5及H2TaF7溶液中的含量，本方法在钽铌冶炼过程中操作简便易行且结果重现性好。     

活性炭吸附原子吸收分光光度法测定铅

微量铅的测定常采用甲基异丁基酮萃取,由于甲基异丁基酮在水中的溶解度大,又有一定的气味;使方法受到一定的限制。 在一定的条件下,活性炭可以吸附富集微量元素的络合物,该法具有取材方便,价格便宜,吸附性能强,操作简单,因而引起分析工作者的重视。 本文采用吡咯啶二硫代氨基甲酸钠,络合苛化渣、硫酸锌及工业废水中的微量铅,加入     

偏光塞曼无焰原子吸收法测定岩石、土壤中的痕量铟

本文研究了在HI介质中以甲基异丁基酮萃取富集铟(Ⅲ),以铬(Ⅵ)为基体改进剂,在升温程序中,先加有机相后加水相Cr~(6+),使铟的吸收提高3倍,25种阳离子不干扰铟的测定,方法已用于地质、化探标样和大量找矿样的测定。     

硫氰酸钾—1,10-二氮杂菲分光光度法测定镁锰铈合金中铁

使用盐酸溶解样品,在微酸性介质中,铁与硫氰酸钾、1,10-二氮杂菲形成紫红色三元络合物,用甲基异丁基酮萃取该络合物,于分光光度计波长520 nm处测量其吸光度,从校准曲线上查得铁含量,从而建立了使用分光光度法测定镁锰铈合金中铁的方法。试验的最佳条件为:水相酸度在3%～7%(V/V),硫氰酸钾溶液加入量为2 mL,1,10-二氮杂菲乙醇溶液加入量为2 mL,显色时间为2 min,甲基异丁基酮加入量为5 mL,振荡时间为60 s。结果表明,试液中铁质量在1~9 μg范围内与吸光度呈线性,校准曲线的线性回归方程为y=14.743 x-0.207,相关系数r=0.999 3;方法中铁的检出限为0.000 037%(质量分数)。按照实验方法测定两个镁锰铈合金样品中铁,结果的相对标准偏差(RSD,n=11)分别为0.23%和0.18%,结果与电感耦合等离子体质谱法(ICP-MS)测定结果相吻合;加标回收率为97%～107%。     

N503萃取锡及其机理的研究

<正> Tatsuya Sekine等人对锡的萃取作了综述。从盐酸体系中萃取锡的常用工业萃取剂有甲基异丁基酮(MIBK),三异辛胺等。但MIBK的水溶性大,且在7MHCl浓度时才有95.3％Sn(Ⅳ)的萃取率,8N HCl时达到99.4％的萃取率,酸度太高。     

基体分离-ICP-AES法测定镀金液中铅、铜、铁、镍的研究

研究了甲基异丁基酮(MIBK)萃取分离金,用电感耦合等离子体原子发射光谱法(ICP AES)测定镀金液中杂质元素的新方法。对分析谱线、基体元素和等离子体参数等进行了讨论。结果表明,方法的检出限为0.008～0.019μg/mL,回收率为89.4%～102.3%,RSD小于3.12%。该法准确、快速、简便,应用于镀金液中杂质元素的测定,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.