火焰原子吸收法测定球墨铸铁中的镁

于稀硝酸体系中，用氯化锶作释放剂，有火焰原子吸收光谱法测定球墨铸铁中的镁，铁、锰、硅、锶等元素对测定无明显干扰。对球墨铸铁中微量镁的测定，相对标准偏差（n＝7）为2．0％。     

原子吸收光谱法测定稀土物料中的钡和锶

稀土矿及其它稀土物料,钡的测定方法多采用经典的硫酸钡重量法。此法手续烦琐且测定结果为钡锶合量。近年来,随着原子吸收光谱的发展和广泛应用,用原子吸收法测定矿石中的钡、锶,资料报导不少,然而,由于干扰和灵敏度的缘故,多采用氧化亚氮——乙炔火焰。采用空气——乙炔火焰测定钡,由于灵敏度低,资料报导不多。地质科学院陈友祎同志     

钨精矿中钡、锶含量的连续测定

研究了火焰原子吸收光谱仪连续测定钨精矿中钡、锶含量的方法。试样经碳酸钠—过氧化钠熔融,熔融物用硝酸溶液提取,在仪器最佳工作条件下,快速、准确地连续测定钨精矿中钡、锶含量。实验表明该方法操作简便,灵敏度高,干扰少,钡的回收率为94.2%～96.3%;锶的回收率为94.0%～102.5%。     

矿石中钙的测定—氧化亚氮—乙炔火焰原子吸收法

矿石中低含量钙的化学分析法困难颇多.用乙炔-空气火焰的原子吸收法干扰也不少,且灵敏度不高.我们采用磷酸溶样后,在氧化亚氮-乙炔火焰中测定钙.方法干扰少、结果准、灵敏度高(SCa=0.0078),而且耗锶量少,尤其适于低含量钙的测定.     

火焰原子吸收法测定硅酸盐样品中氧化钾,氧化钠方法比较

原子吸收和火焰发射测定硅酸盐中Ｓ、Ｆｅ、Ａｌ、Ｃａ、Ｍｇ、Ｎａ、Ｋ及Ｍｎ的测定,一种方法用氢氟酸和硼酸混合酸溶解。第二种方法用偏硼酸锶进行熔融,虽然两种方法中有硼氟酸或锶盐存在,从而没有必要再加入释放剂,但偏硼酸锶基体似乎更利于降低干扰,该法也适用于其它元素和基质的测定。     

贫燃气空气—乙炔火焰原子吸收法测定钢铁中铬

用空气—乙炔焰测定铬的灵敏度与火焰气体比例关系很大,富燃气的发亮火焰灵敏度高.因此在原子吸收分析方法手册和书籍中多数都推荐使用富燃气火焰.人们在这种火焰条件下测定铬时发现:铁、镍、钴、铜等18种金属元素以及硫酸、磷酸、高氯酸、氢氧化钠等有不同程度的干扰.为了消除干扰,曾提出采用氯化铵、盐酸羟胺、氟氢酸铵、高氯酸铵、氯化锶、硫酸钠、焦硫酸钾等作抑制剂.     

火焰原子吸收分光光度法测定锌精矿中氧化钙含量

提出了一种用火焰原子吸收分光光度法测定锌精矿中氧化钙的方法。主要讨论了测定中干扰元素的影响及消除影响的措施。以氯化锶作为钙的释放剂,提高了测定的灵敏度。方法简便、快速、准确。应用于锌精矿样品的测定,结果令人满意。     

酸溶同倍稀释火焰原子吸收光谱法测定铬矿、渣中的多元素

以高氯酸—磷酸混酸分解试样,氢氟酸除硅.硝酸溶液作介质.试液标液同倍稀释.柠檬酸—氰化锶溶液联合抑制磷酸根对钙的干扰.火焰成份和高度影响铬的测定准确度.     

钢铁及高温合金中微量镁的原子吸收光谱法测定

本方法是用空气——乙炔火焰(加氯化锶)及氧化亚氮——乙炔火焰,测定钢铁及高温合金中的微量镁.方法的灵敏度为0.01μg/ml/1%吸收;检出限为0.0023μg/ml.精度为1.6%.可准确、简便、快速测定钢铁及高温合金中0.002～0.1%的镁,如空白值下降,分析下限还可以降低.     

原子吸收分光光度法测定人发中微量锌、铜、铁、钙

本文介绍发样经硝酸、过氧化氢硝化后,在2%的盐酸和0.002%氯化锶介质中,用火焰原子吸收分光光度法,连续测定锌、铜、铁、钙,其相对标准偏差小于7%,方法简便、快速、准确。     

Chinalco Signed Framework Agreement for Strategic Cooperation with Harbin Municipal Government

正Last month,Chinalco signed framework agreement for strategic cooperation with Harbin Municipal Government in Harbin Xiong Weiping,Chairman of Chinalco,said that based on the strategic deployment to build world top-class mining company with the highest growth potential,Chinalco was now concentrating all efforts on making strategic transition and structural adjustment,strategic cooperation with the local governments where     

Jiangxi Promotes Jiangxi Copper Corporation To Become The World's Most Competitive Mining Company

<正>According to the latest info from Jiangxi Province State-owned Assets Supervision and Administration Commission,Jiangxi Copper Corporation was approved to become the first pilot enterprise for deepening reform.Contents of the pilot work is"Three Self"(self expansion,self decision-making,self     

Journal of Rare Earths Contents List of Vol.32(2014)

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Contributions to Baosteel Technical Research wanted

正Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baosteel Group Corporation.Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel.It will continue to follow up on hot topics and serve the company’s technological development and progress.Its readers include experts in     

Ministry of Industry and Information Technology: No Short Term Solution For Our Country’s Excess Nonferrous Metal Smelting Capacity

【正】According to the Ministry of Industry and Information Technology,the Ministry has released the 2013 Operation Report on China’s Industrial Communication Indu...     

Chinalco Signed Framework Agreement for Strategic Cooperation with Gansu Province

正Recently,Chinalco and Gansu Provincial People’s Government signed"Framework Agreement for Strategic Cooperation on Reform,Restructuring and Transition Development of Chinalco’s Electrolytic Aluminum Enterprises in Gansu",signifying that the strategic cooperation between Chinalco and Gansu Province had made new substantive progress.     

Unavoidable Economic Cycle:30% Of Nonferrous Metal Companies Were Involved In Restructuring

正Owing to continual downturn in real estate and bulk commodity markets,a number of traditional industries in China suffered unfavorable impact in performance.With the progressive disclosure of third quarter report,the no-pleasant-surprise performance of     

Baotou Rare Earth Became the World's Biggest High Performance Magnetic Material Base

正The High Performance Magnetic Material Phase II Project,an industry upgrading project implemented by Inner Mongolia Baotou IronSteel Rare Earth(Group)Hi-tech Co.,Ltd,recently basically finished equipment commissioning,signifying that the enterprise had developed the production capacity of15000 t/a Nd-Fe-B strip casting alloy and 5000t/a Nd-Fe-B magnet,thus becoming the world’s     

Introducing Two Central Enterprises to Integrate Rare Earth Industry,Shandong Rare Earth Group Breaks Surface

正With the signing of"Letter of intention for Propelling Integration of Shandong Rare Earth Enterprises"between Shandong Province Commission Of Economy and Informatization,China IronSteel Research Institute Group("China Steel Institute"),and China Rare MetalsRare Earth Co.,Ltd("China Rare Earth"),the"Shandong Rare Earth Group"jointly set up by the 3 units thus broke surface.On August 9,reporters of the China Economic Herald learned from Shandong Province     

Aluminium Production by Province or City in 2014

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