催化光度法测定钢铁中微量铜

本文研究了在氨水介质中,铜（Ⅱ）催化过氧化氢氧化苯酚红褪色的新指示反应。据此建立了催化褪色光度法测定痕量铜的新方法。本方法检出浓度为８．０×１０￣（－１０）ｇＣｕ￣（２＋）／ｍｌ,测定范围为０．３～１．１μｇＣｕ￣（２＋）／２５ｍｌ。用于钢铁样品中微量铜的测定获得了满意的结果。     

β修正双硫腙－CTMAB光度法测定痕量铜

在酸性溶液中,铜（Ｃｕ２＋）与双硫腙和ＣＴＭＡＢ反应,显色液由绿色变黄色,该显色反应灵敏度和选择性较高。本文研究β修正光度法测定环境水和金属材料中痕量铜。在铜量０～１５．０μｇ／２５ｍｌ范围内,修正吸光度符合比尔定律,灵敏度和准确度均比单波长法高。测定表明,相对标准偏差ＲＳＤ≤４％,回收率８８．９％～１０７％。铜最低显色浓度０．０１μｇ／ｍｌ。     

碲的络合吸附波及其应用

本文用方波极谱法研究了碲（Ⅳ）在硫酸－中性红体系中的络合吸附波。在该体系中加入适量的Ａｕ（Ⅲ），碲的灵敏度得到进一步提高，从而提出了测定微量碲的络合吸附波新体系，并对该络合吸附波的机理作了探讨。该体系具有灵敏度高，选择性也较好的特点。试验了３０多种阴阳离子的干扰影响。在掩蔽剂ＥＤＴＡ和酒石酸钠等存在下可进一步提高选择性。实验证明：碲在三种组成的体系中都有良好的线性关系。在硫酸－中性红－Ａｕ（Ⅲ）体系中碲的浓度在０．００５～０．８μｇ／ｍｌ范围内与峰高成线性关系。检测限是０．００２μｇ／ｍｌ。回收率为９７～１０１％．将本法应用于铜钛合金中微量碲的测定，不经分离，可得到满意的结果。     

偶氮胂Ⅲ催化光度法测定锇

在硫酸和热水浴中,Ｏｓ（ Ⅳ） 催化高碘酸钾氧化偶氮胂Ⅲ褪色,建立了测定锇的新催化光度法。锇质量浓度在０ ～０－１０μｇ／２５ｍｌ 范围内符合比尔定律,检出限为９－７ ×１０ － ５μｇ／ｍｌ。对０－０５０μｇ／２５ｍｌ Ｏｓ（ Ⅳ） 测定的相对标准偏差为１－２８ ％ （ｎ ＝ １１） 。催化反应的表观活化能为１０２－２ｋＪ／ｍｏｌ。催化反应对Ｏｓ（ Ⅳ） 和偶氮胂Ⅲ分别为一级反应。试验了４０ 多种共存离子的影响,允许５００ 倍量Ａｇ＋ ,４００ 倍量Ａｕ（ Ⅲ） 和Ｐｔ（ Ⅳ） ,２５ 倍量Ｐｄ（ Ⅱ） 、Ｉｒ（ Ⅳ） 及Ｃｕ２ ＋ 存在。该方法已用于岩矿和冶金产品中锇的测定,相对标准偏差为０－６８ ％ ～３－９２ ％ ,标准加入回收率为９９－８ ％ ～１０３－０ ％ 。     

大孔交联聚丙烯醛—苯乙烯型树脂的研究：Ⅲ.聚丙烯醛—水杨醛双腙螯合树…

本文通过交联聚丙烯醛与水合肼反应制得的聚丙烯醛树脂（Ⅰ），进一步与水杨醛反应，制得丙烯醛－水杨醛双腙树脂。该树脂对金铁吸附容量为１．５ｍｍｏｌ／ｇ（２９４ｍｇＡｕ＾３＋／ｇ），对钯的吸附容量为０．８８ｍｍｏｌ／ｇ（９３ｍｇＰｄ＾２＋／ｇ）。吸附在树脂上的Ａｕ＾３＋，Ｐｄ＾２＋可用硫脲－ＨＣｌ溶液洗脱，回收率分别为９９．９％（Ａｕ＾３＋）和９９．０６％（Ｐｄ２＋）。     

溴酸钾氧化甲基绿催化光度法测定痕量钯

研究了稀硫酸介质中痕量Ｐｄ（Ⅱ）催化溴酸钾氧化甲基绿的褪色反应及动力学条件，建立了高灵敏度测定痕量Ｐｄ（Ⅱ）的新催化光度法。方法的灵敏度为５６７×１０－１２ｇ／ｍｌ，线性范围为０～０１μｇ／２５ｍｌ。用于测定矿石中的痕量钯，结果较好。     

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     

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     

时间分辨—吐温80化学发光新体系同时测定痕量金和锇的研究

根据吐温８０ＫＯＨ化学发光体系中Ａｕ（Ⅲ）和Ｏｓ（Ⅳ）化学发光动力学性质上的差异，提出了同时测定痕量Ａｕ（Ⅲ）和Ｏｓ（Ⅳ）的时间分辨化学发光分析法。方法的检测限Ａｕ（Ⅲ）为１１×１０－９ｇ／ｍｌ，Ｏｓ（Ⅳ）为１０×１０－８ｇ／ｍｌ；线性范围Ａｕ（Ⅲ）为１０×１０－８～１０×１０－５ｇ／ｍｌ，Ｏｓ（Ⅳ）为１０×１０－７～１０×１０－６ｇ／ｍｌ。方法的选择性好，用于贵金属冶金物料中Ａｕ（Ⅲ）和Ｏｓ（Ⅳ）的同时测定，结果令人满意。     

苦胺偶氮氨基羟基萘磺酸荧光熄灭法测定微量钒

本文报导新试剂苦胺偶氮氨基羟基萘磺酸（ＰＡＡＨＮｓ）的合成方法,以及用新试剂ＰＡＡＨＮＳ荧光熄灭法测定微量钒。检测限为０．０５μｇＶ／２５ｍｌ,在０～２．０μｇＶ／２５ｍｌ范围内具有线性关系,该操作方法简便,灵敏度和选择性好,可用于测定矿石中微量钒,结果较准确。     

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.