TBP色层分离—ICP／AES法测定锆铀铒合金中十七个微量杂质元…

本法对锆铀铒合金中十七个微量杂质元素和铒的测定进行了较系统的实验研究。取样１００ｍｇ时，Ａｌ，Ｃａ，Ｃｏ，Ｃｒ，Ｃｕ，Ｆｅ，Ｍｇ，Ｍｎ，Ｍｏ，Ｎｉ，Ｐｂ，Ｓｎ，Ｔａ，Ｔｉ，Ｖ，Ｙ和Ｚｎ的测定范围为３０－３２００μｇ／ｇ，Ｅｒ为０．２－３．２％，回收率９４－１０８％，ＲＳＤ为０．２－２．１％。     

ICP—AES测定核纯海绵锆中17个杂质元素方法的研究

应用ＩＣＰ－ＡＥＳ法，对核纯海绵锆中１７个杂质元素的测定进行了试验研究。取样量１００ｍｇ时，Ａｌ、Ｃａ、Ｃｏ、Ｃｒ、Ｃｕ、Ｆｅ、Ｍｇ、Ｍｎ、Ｍｏ、Ｎｉ、Ｐｂ、Ｓｎ、Ｔａ、Ｔｉ、Ｖ、Ｙ和Ｚｎ的测定范围是１０μｇ／ｇ－３２００μｇ／ｇ。回收率为９５．２％－１０６．５％。     

ICP—AES法测定人体血清中的Al,Be,Cu,Mn,Mo,V

建立了用ＩＣＰ－ＡＥＳ同时测定人体血清中的Ａｌ，Ｂｅ，Ｃｕ，Ｍｎ，Ｍｏ，Ｖ等六种元素的方法。在我们的设备上，检出限对Ａｌ，Ｃｕ，Ｍｏ为１－３μｍｏｌ／Ｌ，而对Ｂｅ，Ｍｎ，Ｖ为０．１－０．３μｍｏｌ／Ｌ。这六种元素的回收率在１００±２０％之间。     

ICP—AES法同时测定硼铁中的主要成分及杂质

本文研究了用ＩＣＰ－ＡＥＳ法同时测定硼铁中的主要成分Ｂ、Ｆｅ及杂质元素、Ａｌ、Ｍｎ，Ｓｉ的方法。采用碱熔融法分解样品，选Ｃｄ作为内标元素。     

ICP－AES测定核纯海绵锆中17个杂质元素方法的研究

应用ＩＣＰ－ＡＥＳ法，对核纯海绵锆中１７个杂质元素的测定进行了试验研究。取样量１００ｍｇ时，Ａｌ、Ｃａ、Ｃｏ、Ｃｒ、Ｃｕ、Ｆｅ、Ｍｇ、Ｍｎ、Ｍｏ、Ｎｉ、Ｐｂ、Ｓｎ、Ｔａ、Ｔｉ、Ｖ、Ｙ和Ｚｎ的测定范围是１０μｇ／ｇ—３２００μｇ／ｇ。回收率为９５．２％—１０６．５％。     

ICP－AES法同时测定磷铁中的主含量元素和杂质

本文研究用ＩＣＰ－ＡＥＳ法同时测定磷铁的主含量元素Ｐ和杂质元素Ｓｉ、Ｍｎ、Ｔｉ、Ｖ、Ｃｒ的方法。采用碱熔酸化分解试样，选Ｂ为测Ｐ的内标元素，回收率为９６％－１０２％，最大相对标准偏差为８．６０％，大多数结果的相对标准偏差小于５％。     

金属铝中杂质元素的测定及其基体影响的研讨

提出了一种能同时测定金属铝中杂质元素Ｃｕ＇Ｍｎ，Ｍｇ，Ｚｎ，Ｃｒ，Ｎｉ，Ｖ，Ｔｉ，Ｆｅ，Ｓ的ＩＣＰ－ＡＥＳ分析方法，实验考察了金属铝基体，共存元素、不同溶剂等因素驿分析元素测试结果的影响，选择了仪器最佳工作条件。结果表明，当金属铝基体的纯度为９６．００％－９９．９０％时，分析元素的回收率在９５－１０５．０５之间。相对标准偏差ＲＳＤ均小于０．５％。在金属铝进出口商品检验中已获得满意的结果。     

ICP－AES法测定人体血清中的Al、Be、Cu、Mn、Mo、V

建立了用ＩＣＰ－ＡＥＳ同时测定人体血清中的Ａｌ、Ｂｅ、Ｃｕ、Ｍｎ、Ｍｏ、Ｖ等六种元素的方法。在我们的设备上，检出限对Ａｌ、Ｃｕ、Ｍｏ为１～３μｍｏｌ／Ｌ，而对Ｂｅ、Ｍｎ、Ｖ为０．１～０．３μｍｏｌ／Ｌ。这六种元素的回收率在１００±２０％之间。     

TBP色层分离－ICP／AES法测定锆铀铒合金中十七个微量杂质元素和铒

本法对锆铀铒合金中十七个微量杂质元素和铒的测定进行了较系统的实验研究。取样１００ｍｇ时，Ａｌ、Ｃａ、Ｃｏ、Ｃｒ、Ｃｕ、Ｆｅ、Ｍｇ、Ｍｎ、Ｍｏ、Ｎｉ、Ｐｂ、Ｓｎ、Ｔａ、Ｔｉ、Ｖ、Ｙ和Ｚｎ的测定范围为３０～３２００μｇ／ｇ，Ｅｒ为０．２～３．２％，回收率为９４～１０８％，ＲＳＤ（ｎ＝８）为０．２～２．１％。     

ICP-AES法同时测定氯化锂和氢氧化锂中七种杂质元素

本文报导了用ＩＣＰ－ＡＥＳ法同时测定ＬｉＣｌ和ＬｉＯＨ·Ｈ２Ｏ中７种杂质元素Ａｌ、Ｂａ、Ｃａ、Ｆｅ、Ｍｇ、Ｓｉ、Ｚｎ的分析方法。研究了基体元素锂对被测元素的基体效应，采用基体匹配法与背景扣除法进行校正。被测元素的检出限为０．１－９．４ｎｇ／ｍＬ，加标试验回收率为９２％－１０９％，当杂质元素含量为０．０００１％－０．０２８％时，相对标准偏差小于７％。方法简便、快速、准确，用于样品分析，取得了满意的结果。     

5-Br-PADAP分光光度法测定手掌面镀锌工具遗留印迹的锌含量

研究2-(5-溴-2吡啶偶氮)-5-二乙氨基苯酚(5-Br-PADAP)分光光度法测定手掌面镀锌工具遗留印迹的锌含量。考察了缓冲液用量、pH、显色剂用量等反应条件对测定的影响;在优化好的条件下,建立了标准曲线并测定了不同接触时间、时间间隔条件下手掌面镀锌工具遗留印迹的锌含量。研究结果表明,pH 8.0的硼砂-硼酸缓冲液4 mL,1 g·L-1的5-Br-PADAP溶液0.2 mL以及10%曲拉通-X-100溶液1 mL为最佳测定条件,在此条件下,Zn2+在0~14 μg范围内呈良好的线性关系,回归方程为y=1.851 34x+0.002 29;在接触时间10 s~5 min内,手掌面镀锌工具遗留印迹锌含量呈上升趋势,在5~10 min内趋于平缓,在接触时间5 min时已基本达到饱和状态,锌含量在0.425~2.377 μg·cm-2;手掌面镀锌工具遗留印迹锌含量在间隔时间0~2 h急剧下降,在2~7 h内下降的幅度逐渐变小,当间隔时间达到7 h时,锌含量仅为0.188 μg·cm-2,与间隔0 h锌含量相比减少了约90%。因此,微量金属显现实验一定要尽早进行。此外,不同间隔时间条件下手掌面锌含量的变化规律与喷洒显现实验中遗留印迹强度变化并非完全对应,这说明手掌面上的锌含量并非唯一可以影响不同间隔时间条件下遗留印迹强度的因素。首次在实验中证实了Zn2+与蛋白质结合后可以被络合能力更强的5-Br-PADAP分子夺取出来而显色的假设。运用此种宏观微观相结合的方法进行研究,有利于对微量金属显现实验中各影响因素机理的探讨,为进一步的研究奠定了基础。     

Investigation of zinc powder modified by ultrasonic impregnation of rare earth lanthanum

Different lanthanum conversion films coated directly on zinc particles are prepared by ultrasonic impregnation with the variable concentration of lanthanum nitrate solution and the adjusted ultrasonic time to modify zinc powder, and the characterization as well as electrochemical behavior of zinc are analyzed using scanning electron microscopy, energy dispersion spectrometry, potentiodynamic polarization, cyclic voltammetry. The lanthanum conversion films are found to enhance the property of corrosion resistance, suppress the dendritic growth and reduce the capacity loss for zinc electrode made of such modified zinc powder. Furthermore, the particle size of zinc powder immersed in lanthanum nitrate solution becomes thin and slim under the effect of ultrasound, which is beneficial to improve the electrochemical reaction activity of zinc powder at the assurance of high corrosion resistance for zinc electrode.     

速效救心丸中Ca,Mg,Fe,Cu,Zn的测定及Ca/Mg,Cu/Zn比值分析

本文采用火焰原子吸收分光光度法测定了速效救心丸中Ca ,Mg ,Fe,Cu ,Zn五种金属元素的含量 ,并对速效救心丸中Ca/Mg ,Cu/Zn含量比值进行了分析研究。结果表明 ,速效救心丸中含有丰富的Ca,Mg ,Fe ,Cu ,Zn元素 ,元素含量Ca>Fe >Mg >Zn >Cu ,它为探讨速效救心丸中Ca ,Mg ,Fe ,Cu ,Zn与治疗冠心病之间的关系提供了有用的数据。     

On the existence of canted spins in Mg-Zn system

The variation of magnetization as a function of Zn concentration in the Mg-Zn system is measured using a high-field loop tracer at liquid nitrogen temperature. The XRD studies show that the lattice parameter increases linearly with increase in the zinc content. The magnetization is found to increase with the zinc concentration, reaches a maximum atx=0.2 and thereafter falls to zero for non magnetic zinc ferrite, which is the behaviour similar to other zinc containing ferrites. The variation of magnetization as a function of zinc content suggests the existence of a canted type of spin arrangement in this system. The cation distribution is suggested.The authers are thankful to Professor R. N. Patil for encouragement     

Radiation damage and decay characteristics of zinc selenide emission bands and their equivalence to zinc sulphide emission bands

Irradiation of zinc selenide at ～ 20°K with electrons capable of displacing zinc atoms results in the production of cathodoluminescence emission bands at 610 and 630 nm. Enhancement of the 630 nm emission band by electron damage requires the presence of copper in the samples. These emissions have been shown to give a peak energy shift to lower energies after excitation, as is characteristic of donor-acceptor pair recombination. It is concluded that the 610 and 630 nm emission bands of zinc selenide are equivalent to the self-activated and copper green emission bands of zinc sulphide. The 530 nm emission band of zinc selenide is not sensitive to electron damage, shows no time shift and is thought to be equivalent to the copper blue emission of zinc sulphide.     

Electrochemical and hydrothermal deposition of ZnO on silicon: from continuous films to nanocrystals

This article presents the study of the electrochemical deposition of zinc oxide from the non-aqueous solution based on dimethyl sulfoxide and zinc chloride into the porous silicon matrix. The features of the deposition process depending on the thickness of the porous silicon layer are presented. It is shown that after deposition process the porous silicon matrix is filled with zinc oxide nanocrystals with a diameter of 10–50 nm. The electrochemically deposited zinc oxide layers on top of porous silicon are shown to have a crystalline structure. It is also shown that zinc oxide crystals formed by hydrothermal method on the surface of electrochemically deposited zinc oxide film demonstrate ultra-violet luminescence. The effect of the porous silicon layer thickness on the morphology of the zinc oxide is shown. The structures obtained demonstrated two luminescence bands peaking at the 375 and 600 nm wavelengths. Possible applications of ZnO nanostructures, porous and continuous polycrystalline ZnO films such as gas sensors, light-emitting diodes, photovoltaic devices, and nanopiezo energy generators are considered. Aspects of integration with conventional silicon technology are also discussed.     

Aqueous Synthesis of Water-Soluble L-Cysteine-Modified Cadmium Sulfide Doped with Silver Ion/Zinc Sulfide Nanocrystals

The water-soluble silver ion-doped cadmium sulfide nanocrystals were synthesized by a co-precipitation technique in aqueous solution using L-cysteine as surface modifier, and then L-cysteine-modified cadmium sulfide doped with silver ion/zinc sulfide core/shell nanocrystals were prepared by zinc sulfide epitaxial coated on surface of silver ion-doped cadmium sulfide nanocrystals. The crystal structure, morphology, and spectral properties of cadmium sulfide doped with silver ion/zinc sulfide nanocrystals were characterized by X-ray power diffraction, transmission electron microscope, infrared spectrum, and photoluminescence spectrum. The results show that the photoluminescence quantum yield of cadmium sulfide doped with silver ion/zinc sulfide nanocrystals is improved greatly after doped with silver ion and coated with zinc sulfide shell. The cysteine modified on the surface of cadmium sulfide doped with silver ion/zinc sulfide nanocrystals renders the nanocrystals water-soluble and biocompatible.     

光谱法锌离子检测系统的研究

采取标准锌显色剂与锌发生显色反应，生成不溶于水的絮状络合物。用光谱仪测它的吸光度，研究其特征谱与吸光度的特点，建立其浓度与特征波长吸光度间的数学模型。本文所采用的显色剂主要与锌、铜、镉、镍四种离子发生络合反应。因此分别探索了四种离子高浓度以及低浓度时显色反应的吸光度，最终通过得到锌离子浓度与吸光度的关系式以及锌离子浓度与四波长下四种离子混合溶液显色后的吸光度的关系式，给出了锌离子的吸光度与总吸光度的关系式。显色反应能否满足分光光度法的要求，主要与显色剂的性质有关，同时显色反应的条件也至关重要。因为在显色反应过程中，主要是锌离子与锌显色剂发生络合反应形成络离子，进而形成絮状络合物。络离子一般比较稳定，但在水溶液中也存在着电离平衡，也就是说当显色条件发生变化时，既有可能形成络离子，也有可能发生络离子的分解，从而影响络合反应的程度。显色条件包括显色剂用量、pH值、反应温度、显色时间、待测溶液的盐度以及浊度等。重点研究待测溶液的盐度对锌离子浓度测量值的影响，并通过实验给出影响规律以及校正模型。     

塞曼校正原子吸收法测定钢铁中锌的背景过度补偿的研究

本文实验研究了在磁场置于石墨炉原子化器的塞曼背景校正原子吸收分光光度计上的铁基体对分析锌元素的影响。铁２１３．８５９ｎｍ线与锌２１３．８５６ｎｍ分析线相差０．００３ｍｍ，在分析过程中铁对锌产生严重的光谱重叠干扰和塞曼背景校正过度补偿。经实验确定了两个原子化阶段，第一个原子化阶段锌完全原子化，铁原子化；第二个原子化阶段铁完全原子化，从而实现分步测定锌和铁两种元素，完全消除了铁基体对锌的光谱干扰。     

2-(2-喹啉偶氮)-5-二甲氨基酚固相萃取光度法测定锌的研究

研究了新试剂2-(2-喹啉偶氮)-5-二甲氨基酚(QADMAP)与锌的显色反应,在pH 8.5的硼酸-氢氧化钠缓冲介质中,Triton X-100存在下,QADMAP与锌反应生成2∶1稳定络合物,体系最大吸收波长λ_max=590 nm,摩尔吸光系数ε=1.22×105 L·moL-1·cm-1,样品中的锌用强阴离子交换固相萃取柱固相萃取预分离和富集后用该方法测定,结果令人满意。