ICP-AES法测定硅钙合金中铝、锰和磷的研究

试样用硝酸、氢氟酸分解,采用ICP-AES法测定硅钙合金中铝、锰和磷的含量,进行了分析谱线的选择、共存元素干扰及精密度和准确度实验。结果表明,铝、锰和磷元素的检出限分别为0．006μg／mL、0．004μg／mL和0．0004μg／mL,回收率分别为100．5％、100．0％和103．2％。分析方法简便快速,精密度和准确度都较高。     

ICP—OES法测定铝铁中的铝锰硅磷铜铁含量

用稀王水溶解试样,ICP—OES法直接测定铝铁中的铝、锰、硅、磷、铜、铁的含量。对样品溶解酸度、元素谱线选择、背景校正扣除、样品基体及待测元素间干扰等因素进行了试验研究。采用基体匹配与背景扣除法消除基体对待测元素的光谱干扰,确定了最佳实验条件。结果表明：各元素的加标回收率为96．0％～105．0％,相对标准偏差小于2．50％。本法与化学分析方法对照,测定结果一致,已用于铝铁产品的检验。     

ICP-AES法测定铝锰合金中的铝、锰、硅、磷元素

应用ICP-AES法直接测定铝锰合金中的铝、锰、硅、磷元素的含量,对样品溶解酸度、元素谱线选择、背景校正扣除、样品基体及待测元素间干扰等因素进行了试验研究。采用基体匹配与背景扣除法消除铁基体对待测元素的光谱干扰。确定了最佳实验条件。结果表明：各元素的加标回收率为97．6％～105．0％,相对标准偏差小于1．48％,与化学分析方法对照,测定结果一致。可用于铝锰合金的检验。     

氢化物发生-原子荧光光谱法测定纯铝中的痕量汞

应用氢化物发生-原子荧光光谱法测定纯铝中的痕量汞,研究了纯铝溶解的最佳条件,在优化的试验条件下。汞的检出限为0．03ng／mL,回收率在96．0％～104．0％之间,相对标准偏差为0．9％。方法简便、快速、准确度高、基体干扰小,可测定纯铝中0．0000X％-0．00X％范围内的汞,结果良好。     

ICP—AES法测定锌铝合金中的微量镧铈

采用电感耦合等离子体原子发射光谱（简称ICP—AES）法同时测定锌铝合金中的镧、铈元素。对样品溶解条件及影响其光谱测定的各种因素进行了研究，确定了试验的最佳测定条件。结果表明，La的检出限为0．0011μg／mL，Ce的检出限为0．013μg／mL，回收率97．0％～104．0％，相对标准偏差（RSD）小于1．00％。方法中La的测定范围0．001％～0．5％，Ce的测定范围0．005％～0．5％。该方法简便、快速、准确，用于锌铝合金中La、Ce的测定，结果满意。     

Al、Ti元素对高锰铝青铜组织和性能的影响

为了解合金元素Al、Ti对高锰铝青铜组织和性能的影响，采用石墨坩埚炉熔炼，制取了Al、Ti含量不同的高锰铝青铜试样，通过对试样进行金相组织检验和硬度测试分析，发现Al、Ti元素含量对高锰铝青铜组织和硬度的影响较大，确定了用该高锰铝青铜材料制造冶金备件产品时，Al元素的最佳含量为7．5％～8．2％、Ti元素的最佳含量为0.20％～0．25％．     

铝基轴承合金中锡的测定——火焰原子吸收光谱法

对铝基础承合金中锡的测定——火焰原子吸收光谱法中介质及酸度的影响、基体及杂质元素的干扰进行了试验。结果表明：在波长286．3nm处，以铝为底液，在10％～20％盐酸介质条件下，测定的灵敏度较高，吸光度较稳定，共存杂质元素不干扰测定。标准回收率为99．90％～100．27％，变异系数0．14％。该法简便快速，适用于铝基轴承合金5．5％～7．0％的锡的分析。     

电感耦合等离子发射光谱法测定稀土铁合金中铝量

样品经盐酸分解，草酸沉淀分离稀土，用电感耦合等离子发射光谱法测定溶液中铝量，测定结果的相对标准偏差小于3．0％，加标回收率90％～99％，检出限为0．045μg／mL。     

ICP—AES法测定铝锰合金中的铝锰硅磷含量

用稀王水溶解试样,ICP—AES法直接测定铝锰合金中的铝、锰、硅、磷的含量。对样品溶解酸度、元素谱线选择、背景校正扣除、样品基体及待测元素间干扰等因素进行了试验研究。采用基体匹配与背景扣除法消除铁基体对待测元素的光谱干扰,确定了最佳实验条件。结果表明：各元素的加标回收率为97．6％-105．0％,相对标准偏差小于0．88。本法与化学分析方法对照,测定结果一致,已用于铝锰合金产品的检验。     

电感耦合等离子体质谱法测定精铟中的杂质元素

研究建立了不分离基体元素,直接采用电感耦合等离子体质谱法测定精铟中的杂质元素的方法。通过采用标准加入法,有效地校正了基体效应干扰。方法的检测限为0．005—0．015ng／mL;精密度为3．1％～7．1％;回收率为91％～109％。本法可满足99．995％精钢中杂质元素测定的要求,方法快速,结果准确。     

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.