氯化钡中氧化钡的分离及测定

研究了氯化钡和氧化钡在盐酸、乙醇、丙酮、乙醚及盐酸－乙醇、盐酸－丙酮、盐酸－乙醚中的溶解性，提出以盐酸－乙醇为溶剂进行两者的分离。以ＤＢＣ－ＣＰＡ为显色剂分光光度法测定氧化钡的含量，加料回收率为９８％￣１０２％，氧化钡含量为０．３２％时，平行测定７次，相对标准偏差为１．５８％，该法适于快速测定热处理盐浴中氧化钡的含量，对监控盐浴品质有指导意义。     

停流－配体交换动力学法测定痕量银的研究

本文依据银对亚铁氰化钾与Ａ，Ａ＇－联吡啶配体交换反应的催化作用，以生成的红色配合物为指示剂，建立了测定痕量银的停流流动注射催化光度法。线性范围为０－７５ＮＧ／ＭＬ，方法检测限为０．５ＮＧ／ＭＬ。除ＨＧ２＋严重影响测定，ＦＥ２＋、ＣＯ２＋和ＺＮ２＋对测定有轻度干扰外，其余离子不影响测定。用本法测定了自来水及模拟样品中的银含量，回收率为９７．８％－１０３．４％，变异系数ＲＳＤ＝０．９５％－１．７４％。     

火焰原子吸收法测定低含量氧化铜矿物

以无水亚硫酸钠作为抑制剂，用硫酸溶液浸出矿样，浸出液用原子吸收法的测定铜，准确测定矿样中低含量的氧化铜矿物。无水亚硫酸钠浓度1％，硫酸浓度3％，浸出时间45min，测定结果的标准偏差为0．002－0．004，相对标准偏差4．3％－4．5％。     

化学蒸气发生—原子荧光光谱法测定皮革和纺织品中可溶性痕量镉

为建立化学蒸气发生－原子荧光光谱法测定皮革和纺织品中可溶性痕量镉的方法，研究了还原剂浓度、酸度、催化剂浓度、共存元素以及仪器条件等主要因素对测定的影响。选择了最佳试验条件，检出限为0.8ng/g，加标回收率在95％－107％之间，能满足国际标准规定限量的测定要求。     

核级UO_2及U_3O_8中铌的萃淋树脂分离－催化极谱法测定

样品溶液经ＣＬ－５２０９萃淋树脂在２ｍｏｌ／Ｌ硝酸介质中分离铀后，用催化极谱法测定铌。铌在０．８％Ｈ２ＳＯ４－０．０５ｍｏｌ／Ｌ酒石酸－２％ＫＳＣＮ－０．０８％抗坏血酸－０．０００４％聚乙烯醇底液中，于－１．３Ｖ处呈现络合催化氢波（ｖｓ．ＳＣＥ）可用二次导数测定。铌峰电流与浓度（０．００５～０．０３μｇ／ｍＬ）有线性关系。称样０．１ｇ时，铌的测定下限为０．５μｇ／ｇＵ、６次测定相对标准偏差＜１５％，加入回收率为９１％～１１９％。     

核纯铀中14种稀土杂质的萃取色层－光谱测定

采用我院研制的ＣＬ－５２０８和ＰＭＢＰ萃淋树脂，萃取色层分离－光谱法测定了核纯铀中１４种微量稀土元素。文中较详细地比较了不同类型激发光源和光谱仪器的稀土测定下限，以及样品激发保护气氛和电极构型对稀土测定灵敏度的影响。以取样量１ｇ计算，１４种稀土杂质定量测定下限在０．０００５—０．０４μｇ／ｇ。化学分离回收率在８５％－１１３％。方法相对标准偏差（ＲＳＤ）５％－２２％。样品对照结果基本符合。方法灵敏，操作简便，便于厂矿推广应用。     

DHDECMP萃取树脂色谱分离－ICP／AES法测定核纯级UO_2中Ti、V和Mo

本文采用ＤＨＤＥＣＭＰ萃取树脂为固定相、３ｍｏｌ／ＬＨＮＯ３为流动相的萃取色谱法使杂质元素与铀基体分离，杂质流出液引入ＩＣＰ测定。取样２００ｍｇ时，Ｔｉ、Ｖ和Ｍｏ的测定下限分别为：０．０８×１０－６、０．３４×１０－６、０．６×１０－６。当各元素的加入量为５．０×１０－６时，方法加入回收率在９４％－９９％之间，相对标准偏差≤１４％。     

氢化物-原子荧光光谱法测定萤石粉中砷量

提出了以氢化物－原子荧光光谱法测定萤石粉中砷量的新方法，研究了酸介质、还原剂用量、载气流量、原子化温度等因素对测定的影响，并选择出最佳工作条件。砷的栓出限为6．8ng／g，测定砷的荧光强度与其浓度的线性范围为0－100μg／L，回收率在90．０％～102．０％之间。相对标准偏差为5．05％。此分析方法具有较高的灵敏度、精密度和准确度。     

FIA—I型铀自动分析仪的研制

FIA－I型铀自动分析仪由流动注射流路系统、微机系统、光度检测器和电子学电路组成。流路系统装有新设计的多功能注入阀，它能自动更换试样注入体积，具有多位路切换功能，可以方便地改变测定的范围项目，使仪器能进行多种方式的流动性注射分析操作，具备了通用仪器的功能。流路系统中还配有对铀有特效富集能力的萃取色层柱，使仪器能适用各种复杂试样中痕量铀的测定。采用Br-PADAP作显色剂，加入阴离子表面活性剂十六烷基吡啶，在水相介质中测定铀。测定范围为0．02－500mg/L，相对标准偏差1％－2％，分析速度为30－90样品次／h。经实际应用考核，取得了满意的结果。     

应用二苯基碳酰二肼光度法测定锆石精矿中微量铬的研究

对用二苯基碳酰二肼光度法测定锆石精矿中微量铬的反应条件和高锰酸钾的氧化作用进行了研究，制定出准确和简便的分析方法，测量的相对标准偏差为１．８％－３．９％，加料回收率为９９．４％－１０８．５％。     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

2014 second batch of rare earth quota released

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