Study on Adsorption Behavior of Rare Earth Complexes on Nanometer-Size Titanium Dioxide with ICP-AES

Inrecentyears ,rareearthelements (REEs)havebeenwidelyusedinfunctionalmaterials ,cata lystsandotherproductsinindustry ,diagnosisreagentsofmagneticresonanceimaging (MRI)inmedicineandsomefertilizersinagricultureespeciallyinChina .However,asaresultoftheirusage ,moreandmoreREEsaregettingintotheenvironment,andalsointohumanbodyviafoodchain[1,2 ] .Itisnotclearwhetherrareearthelementsareessentialforman ,soitisveryurgenttostudythebiologicaleffectofrareearthelementsinhumanhealthandenvironment .Inthes…     

一种分析混合稀土的快速、准确方法——ICP光谱法

长期以来,人们一直把x-射线荧光光谱法(XRF)作为分析混合稀土试样的标准分析方法,该法具有快速、准确、多元素测定及不用化学预处理的特点。但是,ICP光源的出现及分析应用使这一情况发生了变化。     

Determination of Trace Rare Earth Elements in Biological Samples by ICP-AES with Tungsten-spiral Electrothermal Vaporization Sampling

A method for determination of trace rare earth elements in biological sample by ICP-AES withtungsten-spiral electrothermal vaporization(TETV-ICP-AES)sampling has been developed in this work.Several influencing factors including desolvation and vaporization parameters,carrier gas flow rate and ma-trix effect were investigated in detail.Under optimal experimental conditions,the detection limits for La,Nd,Gd,Dy,Ho,Yb,Lu and Y were obtained in the range of 10~(-9)～10~(-11) g,and they are comparable to and,inmost instances,better than those for the GFAAS and conventional pneumatic nebulisation-ICP-AES.Theprecision(RSD)obtained for this method is less than 6%.     

Determination of Trace Amount of Vanadium in High Purity Y_2O_3 by Electrothermal Vaporization－ICP－AES With Bi（PDC）_3 Coprecipitation

ＤｅｔｅｒｍｉｎａｔｉｏｎｏｆＴｒａｃｅＡｍｏｕｎｔｏｆＶａｎａｄｉｕｍｉｎＨｉｇｈＰｕｒｉｔｙＹ_２Ｏ_３ｂｙＥｌｅｃｔｒｏｔｈｅｒｍａｌＶａｐｏｒｉｚａｔｉｏｎ－ＩＣＰ－ＡＥＳｗｉｔｈＢｉ（ＰＤＣ）_３ＣｏｐｒｅｃｉｐｉｔａｔｉｏｎＨｕＢｉｎ；Ｙａ?..     

流动注射分析在原子吸收光谱间接测定法中的应用

本文对近年来流动注射分析(FIA)技术在原子吸收光谱间接测定法中的应用进行了综述.涉及的FIA技术包括单流路系统,合并带技术,连续液-液萃取和连续沉淀-溶解.     

高纯稀土氧化物中的非稀土杂质的测定流动注射微柱预富集ICP-AES法

利用自合成的碳硅凝胶为吸附材料,以铜试剂［二乙基二硫代氨基甲酸钠（ＮａＤＤＴＣ）］为柱前衍生化试剂。在优化的实验条件下,于ｐＨ４．６的缓冲介质中在线预富集Ａｌ（Ⅲ）,Ｃｒ（Ⅵ）,Ｃｕ（Ⅱ）,Ｆｅ（Ⅲ）,Ｐｂ（Ⅱ）,Ｖ（Ⅴ）和Ｚｎ（Ⅱ）．采用停流技术洗脱,富集倍数可达８．１～１２．６倍,检出限为ｎｇ／ｍＬ级。对高纯氧化铕（Ｅｕ２Ｏ３）中的非稀土杂质进行测定,可避免大量稀土基体对测定的干扰。     

PMBP—醋酸丁酯溶剂萃取和ICP光谱测定铝合金中的痕量稀土杂质

微量稀土的存在可以明显改善合金的机械及其他性能,稀土在铝合金中有着广泛的应用。对于铝合金中稀土分量的测定,文献中已有不少报道,主要分析方法为:X—射线荧光光谱法和ICP光谱法。存在的问题是分析灵敏度不够高,因此,进一步改善铝合金中单一稀土的测定灵敏度仍然是面临的重要     

稀土元素的氟化辅助电热蒸发——等离子体光谱分析及蒸发机理研究

本文提出了氟化辅助ETV—ICP—AES测定稀土元素的新方法,对其分析特性进行了详细考察和研究。研究了稀土元素在石墨炉中的蒸发行为,并提出了蒸发机理。系统地探讨了影响氟化蒸发的因素,优化了稀土元素氟化蒸发条件。该法用于测定高纯La_2O_3中的痕量Y,其分析结果和常规溶液雾化—ICP—AES结果吻合很好。     

Study of Direct Determination of Trace Lanthanum in Biological Samples by ICP－AES Combined with Fluo

ＳｔｕｄｙｏｆＤｉｒｅｃｔＤｅｔｅｒｍｉｎａｔｉｏｎｏｆＴｒａｃｅＬａｎｔｈａｎｕｍｉｎＢｉｏｌｏｇｉｃａｌＳａｍｐｌｅｓｂｙＩＣＰ－ＡＥＳＣｏｍｂｉｎｅｄｗｉｔｈＦｌｕｏｒｉｎａｔｉｏｎＥｌｅｃｔｒｏｔｈｅｒｍａｌＶａｐｏｒｉｚａｔｉｏｎＴｅｃｈｎ...     

STUDY ON THE EXCITATION BEHAVIOUR OF RARE EARTH ELEMENTS IN DC ARC BY AXIAL-INTRODUCTION OF AEROSOL

In order to eliminate influence of the carriers on the evaporation of rare earth elements in DC arc,a de-vice which introduces axially the sample aerosol has been designed to study the effects of controlled-atmos-phere,discharge current,electrode polarity and introduction direction of aerosol on the emission of rare earthelements in DC arc discharge.The influence of various matrices and carriers on the line density and excitationcondition of rare earth elements have also been studied,then the related excitation mechnism is proposed.