双波长分光光度法同时测定铁矿中磷和砷

研究了在 0.45mol/L的硫酸介质中 ,铋磷钼蓝中的磷在 0～ 80 μg/5 0mL范围内、铋砷钼蓝中的砷在 0～ 10 0 μg/5 0mL范围内均符合比尔定律。由此建立了利用双波长分光光度法同时测定微量磷和砷的方法。该法简便、快捷 ,用于含砷铁矿中微量磷和砷的同时测定 ,结果令人满意     

钼蓝分光光度法联合测定钢铁中磷砷

基于磷、砷具有相似的化学性质,在一定的酸度条件下,磷、砷都与钼酸铵和铋盐形成磷铋钼杂多酸、砷铋钼杂多酸,在抗坏血酸的作用下还原成磷铋钼蓝和砷铋钼蓝,且其吸光度值具有加合性,测定磷、砷合量的吸光度值后,用亚硫酸钠-硫代硫酸钠-溴化钾复合还原剂还原掩蔽砷,测定磷的吸光度值,从而可以分别测定磷、砷的含量。大多数的金属离子不干扰磷、砷的测定,只有硅在一定的酸度下产生干扰,可以用提高显色酸度的方法来消除,对于高含量硅可以通过分离除去。方法的线性范围为磷:0~0.75μg/mL;砷:0~1.25μg/mL。掩蔽还原砷后磷的显色稳定性较差,加入乳酸得到了改善。本方法用于实验室快速测定钢铁中的磷和砷。     

直流电弧光谱法测定纯铌及铌制品中砷铋铅锑锡

试验确定了直流电弧光谱法测定纯铌及铌制品中砷、铋、铅、锑、锡等待测元素的分析线波长、积分时间及背景点位置。方法中砷、铋、铅、锑、锡的检出限均小于2μg/g。在选定的实验条件下测定自制样品中砷、铋、铅、锑、锡,结果的相对标准偏差(RSD,n=9)在6.5%~10%之间。按照实验方法对样品进行加标回收试验,回收率为82%~116%;自制样品的测定结果与理论值相吻合,并且测定结果与火花源原子发射光谱法、光栅光谱法的测定结果也基本一致。     

电感耦合等离子体质谱法测定水系沉积物中银铜砷锑铋镉

水系沉积物中银、铜、砷、锑、铋和镉等金属元素的准确测定,对地质找矿工作具有重要的指导意义。实验采用王水于水浴条件下溶解样品,通过选择适宜的同位素以及选用干扰元素校正方程克服了质谱干扰,利用仪器软件在线校正了氯离子对砷的干扰,以2%~3%(V/V)王水为测定介质,建立了电感耦合等离子体质谱法(ICP-MS)测定水系沉积物中银、铜、砷、锑、铋和镉6种元素的方法。在优化的实验条件下,各元素校准曲线线性相关系数均在0.9990以上,方法检出限为0.0028~0.045μg/g,测定下限为0.008~0.13μg/g。采用实验方法测定水系沉积物实际样品中银、铜、砷、锑、铋和镉,测定结果分别与采用交流电弧发射光谱法(ES)测定银,原子荧光光谱法(AFS)测定砷、锑、铋,火焰原子吸收光谱法(FAAS)测定铜,石墨炉原子吸收光谱法(GF-AAS)测定镉的结果基本一致;测得结果的相对标准偏差(RSD,n=11)为0.28%~2.0%。将实验方法应用于水系沉积物标准物质分析,银、铜、砷、锑、铋和镉测定结果的相对标准偏差(n=12)为0.45%~6.0%。     

含砷铁矿中杂质元素的发射光谱直接测定

本文对发射光谱测定含砷铁矿杂质元素中的激发电流参数、电极规格,缓冲剂的组分对灵敏度的影响进行了研究,拟定以国产2m平面光栅摄谱仪一次摄谱,同时测定砷、铝、硅、锰、铅、镁、铜、铋、钙、钛、铟、锌12个元素的方法,测定下限为:     

氢化物发生-原子荧光光谱法测定钢铁及合金中痕量砷和铋(英文)

本文采用氢化物发生-原子荧光光谱法测定钢铁及合金中痕量砷和铋。研究了原子荧光光谱仪最佳操作条件、酸度的影响、共存干扰离子限量以及还原剂的浓度。通过加入硫代氨基脲-抗坏血酸和磷酸能够有效地抑制基体元素的干扰。方法检出限分别为:砷0.04μg/g,铋0.02μg/g(3σ,n=11)。本方法用于测定低合金钢、铁镍基高温合金、镍基高温合金、钴基高温合金以及铜合金中痕量的砷和铋,结果满意。试验表明,该方法具有灵敏度高、准确性好、快捷、方便等优点。     

示波极谱法测定铁矿石中的砷

钢中的砷,主要来源于原料,在冶炼过程中很难去掉。因此,铁矿中的砷含量对钢材的质量有着重大的影响。目前,铁矿中的砷普遍采用的分析方法有氢化物-Ag-DDTC光度法。氢化物一非色散原子荧光法,氢化物—砷铋钼蓝法。对多数工厂来讲,As的分析是困难     

铋钼蓝光度法联合测定砷和磷的研究及其在铁合金分析中的应用

本文较详细地研究了硫酸介质中铋钼蓝光度法联合测定砷和磷的显色条件。拟定了钨铁、五氧化二钒、锰铁、硅锰合金及钨精矿中砷磷联合测量的方法。测得砷铋钼蓝在７３０ｎｍ处有极大吸收，磷铋钼蓝在７００ｎｍ处有极大吸收，在５０ｍｌ体积内，磷在０－７０μｇ，砷在０－１２０μｇ，符合比尔定律。实践证明，本法测定磷和砷，简单快速，分析结果令人满意。     

铋钼蓝光度法联合测定砷和磷的研究

本文较详细地研究了硫酸介质中铋钼蓝光度法联合测定坤和磷的显色条件．制定了五氧化二钒、硅锰合金和锰铁中砷磷联合测定的方法．测得砷铋钼蓝在７３０ｎｍ处有极大吸收；磷铋钼蓝在７００ｎｍ处有极大吸收，。在５０ｍｌ体积内，磷在０～７０ｕｇ．砷在０～１２０ｕｇ范围内符合比尔定律。生产分析实验证明，本法测定磷和砷简便快速，分析结果令人满意。     

氢化物发生-电感耦合等离子体原子发射光谱法测定钼铁中砷锡锑铋

钼铁作为冶炼过程中钼元素的加入剂,为保证冶炼质量,需对砷、锡、锑、铋含量进行严格控制,采用国标方法或原子荧光光谱法,只能单个元素分别检测,分析速度慢,周期长。实验通过氢化物发生法使 砷、锡、锑、铋在0.264mol/L硼氢化钠-40%盐酸的酸还原体系下还原为挥发性共价氢化物,然后借助载气流将其导入电感耦合等离子体原子发射光谱仪中进行测量,从而建立了氢化物发生-电感耦合等离子体原子发射光谱法(ICP-AES)测定钼铁中砷、锡、锑、铋的方法。确定各元素的分析谱线为As 193.759nm、Sn 189.989nm、Sb 217.581nm、Bi 223.061nm;为了消除基体效应的影响,采用基体匹配法配制标准溶液系列绘制校准曲线,各元素的校准曲线线性相关系数均不小于0.999;砷、锡、锑、铋的检出限分别为0.0003%、0.0009%、0.0009%、0.0012%。方法应用于钼铁试样中砷、锡、锑、铋的测定,结果的相对标准偏差(RSD,n=6)为3.1%~4.8%;各元素加标回收率为92%~110%。     

Acceleration of Electricity Reform Brings Benefit to Big Electricity Users,Aluminum Manufacturers Can Save Costs Up to Several Hundred Million

<正>Recently the National Commission of Development and Reform again assembled experts to solicit opinions,and discussed new electricity reform program.According to information disclosed by experts attending the meeting,in the future electricity reform will undergo top-down design,possibly a     

Qinghai's Aluminum Processing Capacity to Rise at the End of the Year

正Since the release of Implementation Opinions on Carrying out‘Guiding Opinions of the State Council on Resolving Serious Production Overcapacity Conflicts’,according to the actual situation of industry,Qinghai has focused on electrolytic aluminum,cement,ironsteel(including iron alloy and silicon carbide),     

Recent Trends in China's Copper Scrap Market-Part Ⅱ

<正>2.Tianjin Scrap Metal Market In Tianjin,we mainly visited Jinghai Ziy Town scrap market and Binhai New Area’some copper scrap enterprises and enterprise using copper scrap.In Ziya we felt the coppe scrap market was particularly deserted,mos copper scrap enterprises in the town wer closed,industry insiders said in 2012 the plac here was bustling with activity.According to     

Shanghai Clearing House to Roll out Renminbi-denominated Copper Clearing Operations in Free Trade Zone

正Clearing House Financial Markets Co.,Ltd.(Shanghai Clearing House)General Manager Xie Zhong told the media recently at the briefing of the international symposium of"Reform Deepening and Mechanism Innovation of the Post-crisis Kerb Market",Shanghai Clearing House will explore the feasibility of carrying out bond business in     

Development and Application of New Materials for Copper Processing in China

正After over 60 years of developmnt,a system for RD and production of copper processing materials has already taken shape in China.After the reform and opening-up,the application of copper processing materials has gradually expanded from the military industry to civil field.The annual output of copper     

China’s Mineral Exploration Market Downturn Causes Decline of Investment in Bauxite

<正>According to a survey report conducted recently by China Geological Survey Development Research Center,in the first half of 2014,China’s mineral exploration market continued to decline,with the investment in exploration of non-fuel minerals dropping by13.7%and drilling workload dropping by21.7%.According to statistical analysis of the Center,     

Fabricated Copper Production by Province or City in 2014

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Zinc Production by Province in 2014

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China's Aluminum Alloy Cable Market has Taken Shape

正Aluminum alloy cable is a mature product and technology that has been used for nearly fifty years in the U.S.Through six years’promotion,it has been widely recognized and accepted in the China market since 2013,which laid the foundation for the development of the aluminum alloy cable market.Aluminum alloy cable is widely applied in the fields of civil construction and industrial and mining enterprises,especially in real estate,steel and metallurgy.     

Qinghai to Build a 100 Billion Yuan Lithium Industry Base

正At 2014 China Qinghai Trade Fair for Green Development Investment,Qinghai EV Rally2014 was introduced for the first time.With electrical vehicles’eco-friendly features,Qinghai manifested its determination on green development.Introducing Qinghai EV Rally was just a signal.By leveraging its rich salt lake resources