高效增碳剂中钛的测定研究与应用

本文通过研究高效增碳剂中二安替比林甲烷与钛的显色反应,建立了直接测定高效增碳剂中钛含量的光度分析法。试样首先用过氧化钠熔融分解,然后用抗坏血酸还原,在盐酸1.2mol/L～1.8mol/L的介质中二安替比林甲烷与钛生成黄色络合物,最后经检测钛含量在0.010%～2.50%范围内符合比尔定律,线性回归方程Y=0.316X-0.015,r~2=0.998,此方法精密度与准确度符合检验要求。     

二安替比林甲烷分光光度法测定金属硅中钛

研究了硫酸驱除高氯酸和二安替比林甲烷-钛(Ⅳ)显色反应条件,建立了二安替比林甲烷分光光度法测定金属硅中钛含量的方法。实验表明,于1.6 mol/L盐酸介质中,二安替比林甲烷与钛(Ⅳ)形成1∶3黄色络合物;钛量在5.00~100.00μg/50 m L范围内符合比尔定律;钛的检出限按空白值3倍标准偏差计算得0.0047μg/m L;ε_(388)=1.48×10~4L/mol·cm;试液中其他共存离子不干扰测定。于5个不同实验室应用实验方法测定3个标准样品中钛的结果均与标准值吻合;按照实验方法测定2个标准样品中钛的结果与X射线荧光光谱法的测定值均基本一致,方法用于金属硅标准样品和实际样品中0.0014%~0.30%钛的测定,相对标准偏差(RSD,n=22)为1.6%~4.6%。     

二安替比林甲烷光度法测定高碳锰铁中钛含量

研究了二安替比林甲烷与钛的反应,建立了直接测定高碳锰铁中钛含量的分光光度法。在1.5 mol/L盐酸介质中,钛与二安替比林甲烷形成1∶3的黄色络合物。50 m L溶液中1~40μg钛含量符合比尔定律。390 nm下表观摩尔吸光系数为1.57×10~4L·mol~(-1)·cm~(-1),回归曲线方程:A=0.0174×w+0.0988,线性相关系数为0.9999。方法用于高碳锰铁中钛的测定其相对标准偏差(RSD)为0.95%~4.15%,回收率为99.2%~101.4%。样品结果与认定值、ICP-AES法的测定值相吻合,分析速度快,操作简单,值得推广。     

二安替比林甲烷光度法快速测定铜合金中的铁

试样以盐酸、过氧化氢溶解后,在0.05～0.1mol/L的盐酸中,三价铁与二安替比林甲烷生成黄色络合物,不需加任何掩蔽剂,可按光度法测定铜合金中的铁。     

高效增碳剂中钛的测定研究与应用

本文通过研究高效增碳剂中二安替比林甲烷与钛的显色反应,建立了直接测定高效增碳剂中钛含量的光度分析法。试样首先用过氧化钠熔融分解,然后用抗坏血酸还原,在盐酸1.2mol/L^1.8mol/L的介质中二安替比林甲烷与钛生成黄色络合物,最后经检测钛含量在0.010%~2.50%范围内符合比尔定律,线性回归方程Y=0.316X-0.015,r2=0.998,此方法精密度与准确度符合检验要求。     

铜基合金中铁的测定分析方法研究

试样以1+1盐酸、过氧化氢溶解后,不需加任何掩蔽剂,在0.045~0.1 mol/L的盐酸中,三价铁与二安替比林甲烷生成黄色络合物,按光度法测定铜合金中的铁。     

钛—二安替比林甲烷—氯化亚锡三元络合物萃取分光光度测定某些合金中微量钛

资料介绍了钛—二安替比林甲烷—氯化亚锡三元络合物萃取分光光度法测定微量钛时,镍、钴、铬、钼、钒、铌等元素均不干扰.本文应用此法着重对可伐合金中微量钛的测定进行了试验.方法灵敏度高、简便可靠,可用于测定可伐合金、镍锰钢、低合金钢、铝镍钴铜合金中微量钛(≥0.002%).一、分析步骤称取0.250克试样于150毫升锥形瓶中,以20毫升硝酸(1 3)溶解,滴加2～3毫升盐酸,加5毫升硫酸(1 1)加热蒸     

直接光度法测定铁水中的钛

选择二安替比林甲烷直接光度法测定铁水中的钛，在稀盐酸的介质中，钛与二安替比林甲烷（DAM）生成黄色络合物，其最大吸收峰为390nm,摩尔吸光系数Σ=9.31&;#215;10^3cmL/mol。     

二安替比林甲烷光度法测定钛在稀土硅镁铁合金的应用

在硫酸-盐酸的酸性介质中,四价钛与二安替比林甲烷生成黄色可溶性络合物,其黄色络合物色泽的强度与钛含量成一定比例关系,借此可用光度法测定稀土硅镁铁合金中钛含量。     

萃取分光光度法测定铅钛合金中的钛

试验在１．８ｍｏｌ／Ｌ盐酸介质中，钛与二安替比林甲烷形成黄色络合物，引络合物与二氯化锡作用形成疏水性的三元络合物，以三氯甲烷萃取，于４００ｎｍ处测定钛，方法准确、可靠，适合于万分之一至百分之一钛的测定。     

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.