水杨酸-次氯酸钠光度法测定水中微量苯胺的研究

在亚硝基铁氰化钾存在下，苯胺在氢氧化钠介质(pH=12．5)中与次氯酸钠、水杨酸反应生成靛酚蓝。苯胺的质量浓度在0．09—8．00mg／L范围内符合比尔定律，用于环境水中微量苯胺类化合物的测定，结果与标准方法吻合。     

镉-8-氨基喹啉配合物吸附波的研究与应用

在氨一氯化铵介质中(pH=10．5)，镉—8—氨基喹啉配合物于-0．86V处产生灵敏的吸附波，其二阶导数波高与镉的质量浓度在0．001—0．2mg／L范围内呈良好的线性关系，检出下限为0．0006mg／L。该方法用于环境水样微量镉的测定，其结果与其它方法吻合。     

混凝法处理酸性磷化废水

介绍了混凝法在处理汽车配件加工生产酸性磷化废水中的应用，在原水pH、CODCr、磷酸盐(P)分别为2．93-4．81、621．2mg／L、72．911mg／L情况下，出水相应指标分别为6．62-8．85、15．5mg／L、0．435mg／L，CODCr、磷酸盐(P)的平均去除率达到97．50％和99.40％。     

2-(5-羧基-1,3,4-三氮唑偶氮)-5-二乙氨基苯胺分光光度法测定钯(Ⅱ)

研究了显色剂2-(5-羧基-1,3,4-三氮唑偶氮)-5-二乙氨基苯胺与Pd(的显色反应的条件。结果表明:试剂与钯在pH 5.5的HAc-NaAc缓冲介质中形成稳定的紫红色络合物,其组成比为2∶1,λmax=585 nm,络合物表观摩尔吸光系数为1.2×104L.mol-1.cm-1,Pd(在0~1.6 mg/L范围内符合比尔定律。方法可以不经分离直接测定钯碳催化剂和合成工业废水中微量钯,加标回收率分别为100.8%和101.0%,RSD(n=6)分别为0.6%和0.7%。     

2-(5-溴-2-吡啶偶氮)-5-二甲氨基苯胺分光光度法同时测定铂与钯

提出了以2-(5-溴-2-吡啶偶氮)-5-二甲氨基苯胺(5-Br-PADAM)作显色剂光度法同时测定铂和钯的新方法。在0.2～3.0mol/L高氯酸介质中,Pd(Ⅱ)与5-Br-PADAM可形成稳定的络合物,其最大吸收波长位于609nm处;在pH3.5～4.8的弱酸性介质中,Pt(与5-Br-PADAM定量反应,铂络合物形成后非常稳定,以强酸酸化可转化为另一种质子化型体。在609nm处,二者的吸光度具有良好的加和性。基于二者显色酸度的差异,建立了铂、钯同时测定新方法,显色反应的摩尔吸光系数分别为εPd=8.2×104L.mol-1.cm-1和εPt=5.5×104L.mol-1.cm-1。铂、钯浓度分别在0～1.1mg/L和0～1.4mg/L符合比尔定律。方法用于合金和催化剂中微量铂和钯的同时测定,结果与AAS法测定结果相符,相对标准偏差在0.50%～2.0%之间。     

2-(5-羧基-1,3,4-三氮唑偶氮)-5-二乙氨基苯胺光度法测定铜Ⅱ

研究了新显色剂 2 - (5-羧基 - 1 ,3,4-三氮唑偶氮 ) - 5-二乙氨基苯胺 (CTZAN)与Cu 的显色反应条件。结果表明 ,Cu 在 pH3 0的HAc -NaAc缓冲溶液中与CTZAN形成稳定的组成比为 1∶2的紫色络合物 ,λmax=565nm ,试剂的λmax=435nm ,对比度Δλ =1 30nm ,表观摩尔吸光系数ε =3 0 3× 1 0 4 ,Cu(Ⅱ )浓度在 0～ 0 8mg/L范围内服从比尔定律 ,所拟方法用于测定镁合金和铝合金标样中微量铜 ,加标回收率为 1 0 1 4%～ 1 0 4 0 % ,RSD(n =6) =1 4%～ 3 9% ,结果满意。     

镍(Ⅱ)、铜(Ⅱ)-5-Cl-PADAB-Tritonx-100体系显色反应的研究与应用

在pH =6 50的HAc -NH4 Ac缓冲介质中 ,在非离子型表面活性剂Tritonx -10 0存在下 ,镍 (Ⅱ )和铜 (Ⅱ )与 5-Cl-PADAB形成稳定的有色络合物。有色络合物最大吸收波长位于 52 0nm处 ,表观摩尔吸光系数分别为 4 7× 10 4 L/(mol·cm)和 4 6× 10 4L/(mol·cm) ,镍的质量浓度在 0～ 1 0 0mg/L ,铜的质量浓度在 0～ 1 12mg/L范围内符合比尔定律。该方法用于钢样中镍和铜的同时测定 ,获得满意结果     

HEDP和渗透剂T协同阻垢性能的研究

静态阻垢法研究了1-羟基乙叉-1，1-二膦酸(HEDP)的阻垢性能，考查了几个主要因素对HEDP阻垢性能的影响。结果表明HEDP的加入量为12．0mg／L．渗透剂T的浓度为0．6mg／L时阻垢率最大，为75．6％；渗透剂T的加入明显地改善了HEDP的阻垢性能．阻垢性能随Ca^2 浓度的增加而增加，在pH值为6到9时药剂的阻垢性能稳定。     

1-(2-吡啶偶氮)-2-萘酚褪色光度法测定稀土氧化物中微量铈

利用Ce（Ⅳ）的强氧化性对1-（2-吡啶偶氮）-2-萘酚（PAN）的褪色作用，建立褪色分光光度法测定微量铈的新方法。试验选择了最佳测定条件，讨论了共存离子的干扰情况。结果表明，在0．06～0．12mol／L H2 SO4介质中，有色溶液的最大吸收波长为440nm表观摩尔吸光系数ε=1．02×10^4L·mol^-1·cm^-1.铈量在0～8．0mg／L范围内与有色溶液褪色程度呈线性关系。方法用于稀土氧化物中微量铈的测定，相对标准偏差≤4．7％，回收率为94％～103％。     

2,7-双(5-羧基-1,3,4-三氮唑偶氮)-变色酸分光光度法测定铜的研究

研究了新显色剂2,7-双(5-羧基-1,3,4-三氮唑偶氮)-变色酸(简称BCTZACA)与Cu(的显色反应条件。结果表明,在pH5·0的HAc-NaAc介质中,Cu(与BCTZACA形成稳定的紫色络合物,络合物的λmax=570nm,试剂的λmax=489nm,络合物的表观摩尔吸光系数ε=4·58×104,Cu(在0~0·8mg/L范围内符合比尔定律。所拟方法直接用于镁合金和铝合金样品中微量铜的测定,加标回收率为101·8%~102·0%,RSD为1·9%~3·6%(n=6),结果满意。     

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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