空气-乙炔火焰原子吸收法测定钙的化学干扰机理及其消除

原子吸收分光光度法测定试样中的钙, 已在诸多实验室中广泛被采用, 但就空气－ 乙炔火焰而言,对测定钙的影响因素比较多、分析方法也较为复杂。针对空气－ 乙炔火焰原子吸收分光光度法测定钙的化学干扰机理及其消除进行了试验研究,并取得了较好的效果。     

原子吸收分光光度法测定铁矿中氧化钙、氧化镁

提出了一个用火焰原子吸收分光光度法测定铁矿中氧化钙、氧化镁的方法。研究讨论了酸度、干扰离子、工作条件等因素的影响。分析中。以HNO3—HF—HCLO4混合酸分解样品。以SrCL2作为钙、镁的释放剂，用工作曲线法测定。方法简便、快速、准确。应用于铁矿样品的测定，结果令人满意。     

CAS—CTMAB分光光度法测定有色厂矿废水中痕量铍

测定水中PPb级的痕量铍,近年来主要的方法有分光光度法、气相色谱法、火焰原子吸收光度法、石墨炉原子吸收光度法、ICP发射光谱法。其中用分光光度法测定水中痕量铍,一般常用三苯甲烷染料和表面活性剂与铍生成三元络合物,以提高灵敏度,降低检测下限。我们参考资料试验了在pH5.0的条件下、用络天     

空气-乙炔火焰原子吸收分光光度计在地质实验测试中的应用和注意事项

空气-乙炔火焰原子吸收分光光度计广泛应用于地质实验测试中,探讨了当前岩石矿物样品化学成分分析主要测试参数金、银、铜、铅、锌、全铁、氧化锰的测定,并对测试过程的注意事项进行了讨论。     

矿样中银含量分析方法研究

概述了矿样中银元素含量分析测定的几种方法,包括滴定法、可见光光度法、原子吸收分光光度计法等,根据实验室测定矿样中银含量的区间范围和实验室现有工作条件,选择采用原子吸收分光光度计火焰燃烧法测定。通过绘制出银元素标准曲线,测定出待测样品中银元素含量,与银精矿标准物质中银元素含量进行校对,平均数在标准物质的允许误差范围内,该方法具有测定灵敏度高、简单易行,操作方便的优点,故采用原子吸收分光光度计火焰燃烧法作为实验室矿样中银元素的分析方法。     

原子吸收分光度法测定钾长石中的氧化钾、氧化钠

用火焰原子吸收分光光度法测定钾长石中的氧化钾、氧化钠。通过干扰元素等的试验，提出了测定氧化钾、氧化钠的条件，并成功的用于生产实践。     

稀土硅铁稀土镁硅铁合金中钙镁锰的联合测定

研究了采用火焰原子吸收分光光度法对稀土（镁）硅铁合金中钙,镁,锰三元素联合测定的条件,确定了分析方法,对标准样品和试样进行了测定,取得了满意结果。     

原子吸收分光光度法在矿石矿物分析中的应用

文中结合实践,探讨分析原子吸收分光光度法在矿石矿物含量测定方面的应用,阐述原子吸收分光光度法的原理特征,并指出矿石矿物分析过程当中应用原子吸收分光光度法受到的主要影响因素,并针对这些影响因素,提出有效的应对方法,旨在进一步提高矿石矿物测定水平,更好地推动原子吸收分光光度法在矿石矿物分析当中的高效应用。     

原子吸收—氢化物法测定废水中的微量砷

原子吸收分光光度法测定废水中的微量砷,目前常用的有火焰法及无火焰法等。火焰原子吸收法灵敏度较低,无火焰原子吸收法灵敏度虽高,但重现性差。本法采用一种无载气简易氢化物发生器装置,利用雾化器产生的负压将发生器内产生的砷化氢气体直接导入空气——乙炔火焰进行原子吸收测定。本方法具有操作简便,快速准确,干扰少等优点,其相对灵敏度为0.0019微克/毫升,比待测溶液直接导入火焰原子吸收法(0.2微克/毫升)提高约100倍,相对标准偏差小于2％。使在不预先富集分离水样的条件下,可直接测定工业     

原子吸收分光光度法与1,10-二氮杂菲分光光度法测定水中总铁的比对试验分析

原子吸收分光光度法与1，10-二氮杂菲分光光度法测定水中铁具有精密度高、准确度好的特点。用两种方法测定的已知样为0．8mg／L和1．0mg／L，经比较1，10-二氮杂菲分光光度法比原子吸收分光光度法精密度更高、准确度更好。     

China's Major Non-ferrous Metals Imports & Exports

正~~     

Zinc Production by Province in 2014

正~~     

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.