ICP-AES测定Nd-Pr合金中的杂质元素

用ICP－AES同时测定了Nd-Pr合金中的Dy、Gd、La、Sm、Ce等5种稀土杂质元素，并研究了基体元素Nd及主量元素Pr对杂质元素的光谱干扰，选择了合适的分析线，用基体匹配法对存在的背景干扰进行了校正。方法的检出限为0．009－0．044μg/mL；回收率为90％－103％。该方法准确可靠、简便快速。     

ICP-AES法分析Au-Be合金

研究了用ＩＣＰ－ＡＥＳ法测定Ａｕ－Ｂｅ合金中Ｂｅ及萃取Ａｕ后测定微量Ｐｔ、Ｐｄ、Ｒｈ、Ｉｒ、Ａｇ等２５个杂质元素的方法。元素间的干扰用等效浓度法校正。杂质元素标准加入回收率为９６－１０７％,相对标准偏差为１．７－１２％。取２．５ｇ试样时相对分析下限为１×１０＾－４－５×１０＾４％。测定合金成分Ｂｅ时相对误差不大于２％。     

ICP－AES法测定铂催化网中的次成分及杂质元素

本文采用ＩＣＰ－ＡＥＳ内标法，对硝酸生产用铂催化剂的次成分Ｐｄ和Ｒｈ，以及十一个杂质元素，进行直接快速测定。部分受干扰的元素，采用扣除其相应等效强度的方法进行校正。本方法的回收率和相对标准偏差，对于次成分分别为：９９．１～１００％和０．１６～０．３１％；对于杂质元素分别为：９５～１１４％和０．８３～１３％。     

ICP-AES法同时测定锑酸钠中的Fe、Cu、Cr和V

本文采用基体分离法，将锑酸钠经氢溴酸处理，加热挥发除锑，在5％盐酸介质中用ICP－AES同时测定锑酸钠中杂质元素Fe、Cu、Cr和V，并运用干扰系数法扣除元素间光谱干扰引起的分析偏差，回收率在93％－101％之间，结果较为满意。该方法操作简便、快速，适用于锑酸钠的日常进出口检验分析。     

ICP-AES法同时测定纯铁中八种杂质元素

本文研究了用ＩＣＰ－ＡＥＳ法同时测定纯铁中８种杂质元素：Ｃｒ、Ｃｕ、Ｍｇ、Ｍｎ、Ｍｏ、Ｎｉ、Ｔｉ、Ｖ的分析方法。研究了铁基体地被测元素光谱线的光谱干扰与物理干扰,采用背景扣除法与基体匹配法进行校正。被测元素的检出限为０．４－３．０μｇ／Ｌ,合成试样的回收率为９１－１１０％,杂持元素含量为０．０００３－０．０５％时,测量的相对标准偏差〈９％,方法简便、准确、结果满意。     

ICP-AES法测定三氧化二锑中杂质

本文采用盐酸－氢溴酸溶解样品并除锑后,用ICP-AES法同时测定三氧化二锑中Bi、Be、Ag、W等23种杂质元素,各杂质元素回收率在90％－110％之间。并对样品的溶解方法,主量与杂质元素间的光谱干扰等进行了研究,建立的分析方法,能准确、快速地了解高纯三氧化二锑的品质。     

AB5型储氢合金及混合稀土的ICP—AES分析

对于制备镍氢电池负极材料的AB5型储氢合金，制备储氢合金的原材料混合稀土主体元素和杂质元素的分析方法进行了较为详尽的研究。利用仪器的功能软件初步选出各分析元素的多条谱线，通过综合考察各干扰元素对分析元素波长的干扰系数，确定出各元素的最佳分析波长，部分受干扰的元素用干扰系数校正法进行了校正。本法应用于实际产品分析，分析精密度为0．12％1．32％，回收率在94％－106％之间。     

电感耦合等离子体质谱法测定高纯氧化铈中11个稀土杂质的研究

报道了用电感耦合等离子体质谱法（ＩＣＰ－ＭＳ）测定高纯氧化铈１１个痕量稀土杂质的方法。分析讨论了氧化铈对测定元素所产生的谱干扰和基体效应，考察了Ｔｌ，Ｇａ，Ｃｓ，Ｉｎ等内标补偿基本抑制效应的作用，用此方法测定１１个稀土杂质的检出限为０．０１７－０．４０ｎｇ／ｍＬ，精密度（ＲＳＤ）为２．６％－８．２％，加标回收率为９６．７％－１０７．９％，分析时，不需要预分离和富集，酸溶后可以直接测定。     

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。     

ICP-AES测定铁钕合金中Ho、Er、Tb、Tm、Cu、Mo、Nb等7种杂质元素

采用ICP－AES法同时测定了铁钕合金中Ho、Er、Tb、Tm、Cu、Mo、Nb等7种杂质元素。研究了基体元素铁、主量元素钕、镝、钴、硼对杂质元素的光谱干扰情况；选择了合适的分析线；测定了分析方法的检出限。加入回收率为90．0％－108．0％。方法准确、快速、简便。     

激光烧蚀固体进样法测定出口铝锭中硅、铁、镓、铜和镁

用激光烧蚀固体进样法测定出口铝锭中硅、铁、镓、铜和镁,与国标方法相比较,无需样品前处理,直接测定,提高了工作效率。经对实际样品进行测定,结果与国标方法相一致。测量结果的相对标准偏差小于8.5%。     

基于声信号的铝锭脱模故障诊断研究

针对铝锭铸造是否脱模的故障检测难题,尝试利用铸模敲击声音信号进行诊断分析。本文首先提出基于改进的小波包算法对敲击声音进行降噪,在对声音信号频域分析后,发现一次敲击后如果铝锭脱模,则一次敲击声音信号和二次敲击声音信号存在明显的峰值频率差,将其作为故障特征参数,并设定阈值,可以对铝锭是否脱模进行故障诊断。现场采集的声音处理实验证明了本文所提方法的有效性。     

Improving the material quality of silicon ingots by aluminum gettering during crystal growth

We present a method for the purification of silicon ingots during the crystallization process that reduces significantly the width of the low charge carrier lifetime region at the ingot top. The back‐diffusion of impurities from the ingot top is suppressed by adding a small amount of pure aluminum into the silicon melt right at the end of the solidification. We study the aluminum gettering effect by instrumental neutron activation analysis (INAA) and Fe_i imaging. Furthermore, we present a model for aluminum gettering of Fe in the silicon ingot that is in agreement with literature data for aluminum gettering at lower temperature. The distribution of iron in the ingots with and without aluminum is fairly well predicted by a combination of this model with a model for Fe contamination from the crucible system. A simulation with varying Al content exhibits further potential for an increased yield of silicon wafers with high charge carrier lifetime. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)     

快速测定硅铁中铝和磷

试样以硝酸、氢氟酸溶解,用高氯酸冒烟驱除氟。铝的测定：于氢氧化钠溶液中将铁、锰、钛等元素与铝分离,加入过量EDTA与铝络合,以PAN为指示剂,用硫酸铜滴定计算铝含量;磷的测定：于硝酸介质中,用硫代硫酸钠还原砷,用抗坏血酸乙醇溶液还原成铋磷钼蓝,用分光光度计测量吸光度,计算磷含量。本方法采取一次溶样同时完成铝和磷的测定,方法快速、准确、可靠,适用于出口铁的日常检验。     

ICP-AES法同时测定银锭中铋、锑、铅、铜、铁杂质元素

本文介绍ICP-AES法同时测定银锭中Bi、Sb、Pb、Cu、Fe杂质元素的方法。试样用稀硝酸溶解后测定,回收率为93.0%-105.0%,RSD为0.36-4.2%。     

Dielectric properties of ZnSe crystals grown from melt

The frequency and temperature dependences of the real and imaginary parts of the permittivity of ZnSe crystals grown from melt have been measured in the low-frequency range. It has been found that the crystal samples cut from different parts of the ingot exhibit different properties depending on their distance from the ingot origin. The difference in the properties is explained by the dominant influence exerted on the polarization by point defects, the formation of which is associated with the deviation of the composition from stoichiometry, as well as by residual impurities and stresses in the crystals.     

峰值积分法的研究与应用

本文对峰值积分法（ＰＩＭＳ）的机理作了探讨，叙述了ＰＩＭＳ法应用于中低合金钢中不同状态铝：总铝（Ａｌｒ）、酸溶铝（Ａｌｓｏｌ）和酸不溶铝（Ａｌｉｎｓ）的成份测定，方法的精密度和准确度能满足分析的要求。     

Investigation of Impurity Ion Transport with Laser Blow-off in HL-2A Tokamak

Non-recycling impurities are injected into ohmic HL-2A plasma for the first time. The impurities of titanium and aluminium are injected in the discharges with varying plasma density and current. The convection and diffusion process of the injected impurity ions during the inward phase are qualitatively investigated. The results show that the transport of impurities is much slower in the central region of the plasma than outside of it and that it is greatly enhanced during sawtooth crashes.     

Charge perturbations around impurities in metals

The calculated properties of the charge perturbations around impurities in metals are summarized and contrasted with the experimental situation in this field.

The effects of coupling between the field gradient excited by the charge perturbation and the quadrupole moments of (host) nuclei on the nuclear magnetic resonance (N.M.R.) signal are summarized and various kinds of experiment based on this quadrupole effect are discussed.

The gross overall features of the charge perturbation are established by analysing N.M.R. data for copper and aluminium based alloys. This analysis leads to the conclusion that simple theories can account for the main experimental findings, but details, in particular the anisotropy of the charge perturbation, cannot be fully explained because band structure effects play an important role.

The relevance of phase-shift analysis is also assessed, and its applicability in cases of complicated Fermi surfaces is discussed. Effects connected with the energy dependence of the scattering potentials for three-dimensional transition metal impurities are reviewed and evidence for the depression of the charge perturbation near to the impurities is summarized for copper and aluminium based alloys. Temperature dependence, caused by the thermal smearing of the host Fermi surface, by the reduction of the mean free path and by the temperature dependence of the scattering potential (connected to the Kondo effect) is also discussed.

Other relevant experimental techniques are briefly summarized together with effects determined by the charge perturbation around the impurities.     

葡萄糖与甲胺还原胺化产物的高效液相色谱分析

建立了以C18柱、RI检测器,甲醇-水-三氟乙酸为流动相,葡丙胺作内标物,分析葡萄糖与甲胺还原胺化产物1-脱氧-1-(甲氨基)-D-山梨醇纯度的HPLC法.方法具有快速、准确、简便等特点,N-甲基葡糖胺、N-甲基葡糖苷、山梨醇的相对标准偏差分别为1.42%、3.24%、2.45%,回收率分别为95.2%-100.9%、96.7%-123.0%、98.3%-117.0%,检出限分别为33ng、38ng、18ng.