氟化电热蒸发／电感耦合等离子体原子发射光谱中的基体效应研究

本文系统研究了氟化电热蒸发／电感耦合等离子体原子发射光谱（ＥＴＶ－ＩＣＰ－ＡＥＳ）测定难熔元素的基体效应。与常规气动雾化（ＰＮ）－ＩＣＰ－ＡＥＳ中的基体效应比较，氟化ＥＴＶ－ＩＣＰ－ＡＥＳ中的基体效应更小。对难熔基体元素，由于基体和待测元素与氟化剂之间的竞争反应，随着基体浓度的增加，待测元素谱线强度降低；对常见基体元素，由于热循环中基体与待测元素之间的选择挥发，对待测元素的蒸发和传输过程无明显影响     

氧化铝负载二苯基硫脲分离富集电感耦合等离子体原子发射光谱测定铂、钯、金和铑

1　引　　言地质样品中痕量的铂族元素须经富集处理后测定 ,离子交换法、火试金预浓集、Ｓｅ ,Ｔｅ共沉淀富集等分离富集方法 ,操作繁琐、复杂。本文采用氧化铝负载二苯基硫脲分离富集电感耦合等离子体原子发射光谱法 (ＩＣＰ ＡＥＳ)测定地质样品中痕量Ｐｔ、Ｐｄ、Ａｕ和Ｒｈ ,发现加入ＳｎＣｌ2 可以大幅度地提高Ｐｔ和Ｒｈ的回收率 ,方法简单、快速。2　实验方法2 .1　主要仪器及试剂　ＡｔｏｍＳｃａｎ2 5型单道扫描电感耦合等离子体发射光谱仪 (美国ＴＪＡ公司 ) 10 0 0ｍｇ ＬＰｔ、Ｐｄ、Ａｕ和Ｒｈ标准储备液 (国家标准物质研究中…     

电热蒸发—电感耦合等离子体原子发射光谱法测定不同挥发性元素时含…

本文探讨了电热蒸发－电感耦合等离子体原子发射光谱法（ＥＴＶ－ＩＣＰ－ＡＥＳ）测定不同挥发性元素Ｔｉ、Ｎｉ和Ｐｂ时含氟基体改进剂的改进作用。发现聚四氟乙烯（ＰＴＦＥ）是所试验的含氟试剂是最理想的基体改进剂。与无基体改进剂的情形相比，采用ＰＴＦＥ作基体改进剂可使难烷元素Ｔｉ和中等挥发元素Ｎｉ的检出了奶分别改善３５０和８倍，但对易挥发元素Ｐｂ则无明显的影响。这表明，以ＰＴＦＥ为基体改进剂ＥＴＶ－ＩＣＰ－     

以PMBP为萃取剂和化学改进剂/电热蒸发电感耦合等离子体原子发射光谱测定二氧化锆中痕量铕

提出了用β－二酮类试剂１－苯基－３－甲基－４苯甲酰基－吡唑酮［５］（ＰＭＢＰ）为萃取剂和 化学改进剂的电热蒸发电感耦合等离子体原子发射光谱（ＥＴＶ—ＩＣＰ—ＡＥＳ）测定高纯ＺｒＯ２ 中痕量Ｅｕ的新方法。讨论了影响Ｅｕ－ＰＭＢＰ 螯合物蒸发的主要因素。在优化实验条件下，Ｅｕ 的检出限为０．９μｇ／Ｌ，相对标准偏差为３．４％，试样分析的回收率为９４．５％～１０５．２％．     

电热蒸发进样电感耦合等离子体原子发射光谱（ETV－ICP－AES）联用技术研究

本文采用国产部件组装了一套ＥＴＶ－ＩＣＰ－ＡＥＳ仪器体系，对装置的连接及操作参数进行优化。深入系统地考察了分析物的蒸发过程和传输过程，提出了难熔元素的蒸发和传输机理。研究了ＥＴＶ－ＩＣＰ－ＡＥＳ中基体效应，提出了以聚四氟乙烯为氟化剂，氟化辅助ＥＴＶ－ＩＣＰ－ＡＥＳ测定难熔元素的新方法，应用于环境和生物标样中痕量元素分析，获得满意结果。     

磷酸三丁酯—钛—钽试剂第三相的形成与应用

本文研究了强酸性介质中，磷酸三丁酯萃取体系（ＴＢＰ．ＨＡ）第三相的形成条件；探讨了ＴＢＰ．ＨＡ对钛的萃取行为；建立了ＨＣｌＯ４－Ｈ２ＳＯ４介质中，利用ＴＢＰ．ＨＡ第三相萃取，然后用ＩＣＰ－ＡＥＳ温室痕量钛的方法。结果表明，由于第三相体积小，对钛有较高的富集倍数，降低了分析的检出限，用ＩＣＰ－ＡＥＳ检测，可以消除基体及其他大部分元素对测定的干扰，测定钛的回收率在９７％－１０１％。利用本法对钢样标准物     

氟化电热蒸发／ICP—AES直接测定SiO2中痕量Fe

对氟化电热蒸发（ＦＥＴＶ）／ＩＣＰ－ＡＥＳ技术中元素的氟化蒸发行为，基体效应和粒度效应进行了考察，确定了杂质（Ｆｅ）与基体（Ｓｉ）分离的最佳实验条件，本法用于ＳｉＯ２中痕量Ｆｅ的直接测定，有灵敏，简便，试样消耗少和不需化学处理等优点。     

SYNTHESIS AND POTENTIAL ANTINEOPLASTIC ACTIVITY OF α－（1－CYCLOPENTENYL） CYCLOPENTANONE DERIVATIVES －A NEW FAMILY OF ANTICANCER AGENTS

ＳＹＮＴＨＥＳＩＳＡＮＤＰＯＴＥＮＴＩＡＬＡＮＴＩＮＥＯＰＬＡＳＴＩＣＡＣＴＩＶＩＴＹＯＦα－（１－ＣＹＣＬＯＰＥＮＴＥＮＹＬ）ＣＹＣＬＯＰＥＮＴＡＮＯＮＥＤＥＲＩＶＡＴＩＶＥＳ－ＡＮＥＷＦＡＭＩＬＹＯＦＡＮＴＩＣＡＮＣＥＲＡＧＥＮＴＳ￥ＣｈｕａｎＭ...     

非对映选择性合成科涅克内酯

反式取代的γ 丁内酯是重要的有机合成中间体[1],已有多种合成路线见诸报道[2～ 4 ].这些方法各有特色 ,但也存在原料难以得到、合成路线冗长、反应条件苛刻、立体选择性不高、总产率低等不足 .我们以巴豆酸甲酯 ( 1)为原料 ,经 5步反应立体选择性地合成了 (± ) 反 科涅克内酯 ( 5 ) .反应式如下 :　　岛津ＩＲ 44 0型红外光谱测定仪 ,ＫＢｒ压片 .ＶａｒｉａｎＥＡ 3 60Ｌ型核磁共振仪 ,ＣＤＣｌ3为溶剂 ,ＴＭＳ为内标 .ＫｙＫｙ ＱＰ 10 0 0Ａ型气相色 质联用仪 ,电离方式为ＥＩ ,电子能量 70ｅＶ .ＶａｒｉａｎＳＰ 3 40 0型色谱仪 ,固…     

DETERMINATION OF BORON BY MICROWAVE PLASMA TORCH ATOMIC EMISSION SPECTROMETRY USING ON－LINE SEPARATION AND PRECONCENTRATION TECHNIQUE

ＤＥＴＥＲＭＩＮＡＴＩＯＮＯＦＢＯＲＯＮＢＹＭＩＣＲＯＷＡＶＥＰＬＡＳＭＡＴＯＲＣＨＡＴＯＭＩＣＥＭＩＳＳＩＯＮＳＰＥＣＴＲＯＭＥＴＲＹＵＳＩＮＧＯＮ－ＬＩＮＥＳＥＰＡＲＡＴＩＯＮＡＮＤＰＲＥＣＯＮＣＥＮＴＲＡＴＩＯＮＴＥＣＨＮＩＱＵＥ￥ＱｕｎＪＩＮ...     

微晶萘负载PMBP微柱分离预富集与电热蒸发—电感耦合等离子体原子发射光谱

报道了微晶萘负载１－苯基－３－甲基－４－苯甲酰基－５－吡唑酮（ＰＭＢＰ）微型柱分离预富集与电热蒸发－电感耦合等离子体原子发射光谱（ＥＴＶ－ＩＣＰ－ＡＥＳ）联用测定痕量稀土元素（Ｓｃ,Ｙ,Ｌａ和Ｙｂ）的新方法,试验影响分离／预富集待测物的各种因素（包括溶液酸度、流速、试样体积、微柱尺寸）;研究了吸附有待测物的微晶萘的溶解方法及共存元素对分离／测定的影响,在优化的实验条件下,方法的相对检出限为１４ｐｇ／ｍＬ（Ｓｃ）,３２ｐｇ／ｍＬ（Ｙ）,１９０ｐｇ／ｍＬ（Ｌａ）和２６ｐｇ／ｍＬ（Ｙｂ）,相对标准偏差（ＲＳＤ）分别为３．１％,３．５％,４．８％和３．４％（ｎ＝９,ｃ＝１０ｎｇ／ｍＬ）,本法已成功地应用生物样品痕量稀土元素（Ｓｃ,Ｙ,Ｌａ和Ｙｂ）的测定,结果满意。     

ICP-AES法直接测定金属钕、氧化钕中的稀土和非稀土杂质元素

建立了金属钕和氧化钕中24个杂质元素的高频感耦等离子体原子发射光谱直接测定的方法。配制了3组可混听多元素标准溶液，采用基体匹配法和多组分光谱拟合（MSF）技术以消除基体光谱干扰。测定元素的回收率为96．8％－104．0％，精密度为0．92（Ti)%-6.9(Ca)%.     

Determination of Rare Earth Elements in Garnet Minerals,Geological Materials by Inductively Coupled Plasma–Atomic Emission Spectral and Mass Spectral Analysis

Abstract

The performance of inductively coupled plasma–atomic emission spectrometry (ICP‐AES) for the determination of 14 lanthanides and Yttrium was evaluated by comparison with inductively coupled plasma–mass spectral (ICP‐MS) analysis. The geochemical reference samples (GRS), DNC‐1(diabase), AGV‐1(andesite), Sy‐2(syenite), MRG‐1(gabbro), AN‐G(anorthosite), AC‐E(granite), and MAG‐1(marine mud) were chosen as test materials and analyzed for checking the precision and reproducibility of the methods. The mineral garnet is separated from the black sands of the southwest coast of India, and the combined cation exchange–ICP method of AES analysis and MS analysis were carried out for the determination of rare earth elements. Both techniques are within the requirements needed for garnet minerals. The determination of rare‐earth elements in these minerals, which contain other elements as major contribution and trace distribution of rare‐earth elements, shows that ICP applied under the proper working condition lives up to the expectations. Major element analysis gives the formula of garnet of Manavalakurichi (MK) as (FeCaMg)_2.79Al_2.07Si_3.05O₁₂ approximated to Fe₃Al₂Si₃O₁₂, hence of almandine-type garnet. The enrichment of heavy lanthanides compared to the light lanthanides indicates that these lanthanides occupy the coordinaton site of Fe²⁺ by replacement. Both techniques are excellent in determining the very low concentration of lanthanides in geological materials, specifically garnet.     

ICP-AES直接测定氯化稀土中稀土元素

以电荷耦合器件为检测器的ＩＣＰ－ＡＥＳ光谱仪直接测定了混合稀土中的十五种稀土元素。考察十五种稀土元素的五十余条灵敏线的谱图,分析稀土元素之间的干扰并选取了合适的分析线,利用多组分谱图拟合方法扣除了空白及稀土元素间的谱线干扰,试验了最佳的溶液酸度及仪器工作参数,方法回收率为９８．４％￣１０１．７％,相对标准偏差小于２％。     

电感耦合等离子体发射光谱法测定新型荧光材料中钙锶铝铕镝钕

提出了新型长余辉光致发光材料中钙锶铝铕镝钕电感耦合等离子体发射光谱的分析方法,并对有利于稀土分量测定的JY-238高分辨率仪器的工作条件作了讨论。     

Inductively Coupled Plasma(ICP) Mass Spectrometry(MS) Hyphenated with Atomic Emission Spectrometry(AES) for Simultaneous Determination of Major, Minor and Micro Amounts of Elements in Geochemical Samples

Introduction Geological resource survey demands for determining various constituents including major, minor, micro, trace and ultra-trace levels of elements for preparing the map of resource distribution of our country. As a powerful and popularly used technique for multi-element analysis, inductively coupled plasma(ICP) atomic emission spectrometry (AES) has been applied to this field for a period of time[1-3]. However, ICP spectrometric determination of those micro, trace and ultratrace elements needs enrichment procedures for improving the detection limit, which is unacceptable in case a great mass of samples should be analyzed as that in the task of geological resource survey. On the other hand, although ICP mass spectrometry(MS) is considered the most powerful method for trace elements determination[4,5], it is difficult for ICP-MS to be used to determine the trace and major analytes simultaneously in a spectrum.     

化学计量学在稀土分析中的应用及进展

本文对化学计量学在吸光光度法、荧光光度法、ICP- AES等稀土分析中的应用进行评述 ,并指出了化学计量学在稀土分析应用中的发展方向 .引用参考文献 98篇     

ICP-发射光谱测定镁钇合金中稀土和非稀土元素

本文研究了ICP-AES测定镁钇合金中17种稀土和非稀土元素的方法。选择了合适的分析线及ICP操作参数。探讨了酸度,载气和基体的变化对被测元素谱线强度的影响,不用化学分离,可同时测定镁钇合金中Y,La,Ce,Pr,Nd,Gd,Tm, Dy,Lu,Ho,Er,Yb和Mo,Ni,Cu,Al,Fe。测定范围分别为(％):Y_(1-40);La,Er0.048—3.2;Tm,Yb,Lu,Dy0.019—1.28;Ho0.0384—2.56;Ce0.0288—1.92;Fe,Ni,Mo,Al,Pr,Nd,Gd0.024-1.6;Cu0.012—0.8。相对标准偏差为1.1—5.3％。回收率为90～115％。方法简单、快速、再现性好、准确度高。     

Preconcentration of Rare Earth Elements in Seawater with Chelating Resin Having Fluorinated β‐Diketone Immobilized on Styrene Divinyl Benzene for their Determination by ICP‐OES

An analytical method has been developed for the preconcentration of rare earth elements (REEs) in seawater for their determination by inductively coupled plasma optical emission spectrometry (ICP‐OES). An indigenously synthesized chelating resin was used for the preconcentration of (REEs) which was based on immobilization of fluorinated β‐diketone group on solid support styrene divinyl benzene. Sample solutions (adjusted to optimized pH) were passed through a polyethylene column packed with 250 mg of the resin. Experimental conditions consisting of pH, sample flow rate, sample volume and eluent concentration were optimized. The established method has been applied for the preconcentration of light, medium and heavy REEs in coastal sea water samples for their subsequent determination by (ICP‐OES). Percentage recoveries of La, Ce, Nd, Sm, Eu, Gd, Dy, Er, Yb and Lu were ≥ 95%, a preconcentration factor of 200 times, and relative standard deviations < 5% were achieved.     

Application of high-surface-area ZrO2 in preconcentration and determination of 18 elements by on-line flow injection with inductively coupled plasma atomic emission spectrometry

A flow-injection analysis (FIA) system incorporating a micro-column of ZrO₂ has been used for the development of an on-line multi-element method for the simultaneous preconcentration and determination of Al, Bi, Cd, Co, Cr, Cu, Fe, Ga, In, Mn, Mo, Ni, Pb, Tl, V, Sb, Sn, and Zn by inductively coupled plasma atomic emission spectrometry (ICP–AES). The conditions for quantitative and reproducible preconcentration, elution, and subsequent on-line ICP–AES determination were established. A sample (pH 8) is pumped through the column at 3 mL min^–1 and sequentially eluted directly into the ICP–AES with 3 mol L^–1 HNO₃. With a sample volume of 100 mL and an elution volume of 1 mL signal enhancement 100 times better than for conventional continuous aspirating systems was obtained for the elements studied. The reproducibility (RSD %) of the method at the 10 ng mL^–1 level in the eluate is acceptable – less than 8% for five replicates. Recoveries between 95.4% and 99.9% were obtained for the elements analysed. ZrO₂, with a specific surface area of 57 m² g^–1 and a capacity of approximately 5 mg g^–1 for the elements studied, was synthesized by hydrolysis of ZrCl₄. The preconcentration system was evaluated for several simple synthetic matrices, standard water samples and synthetic seawater. The effect of foreign ions on the efficiency of preconcentration of the elements studied was investigated. The application of a micro-column filled with high-surface-area ZrO₂ and flow injection inductively coupled plasma atomic emission spectrometry enables preconcentration and simultaneous determination of 18 elements at low concentrations (ng L^–1) in different water samples.