Elemental analysis of trace elements in fly ash sample of Yata?an thermal power plants using EDXRF

Fly ash samples collected by means of an electrostatic precipitator from the lignite-fired Yata?an Power Plants of the located in Turkey was analysed using X-ray fluorescence technique. Five trace elements, namely Nd, Ba, Sr, Mo and As were quantified using XRF. These concentration values can be helpful in developing a environmental pollution abatement approach for various applications of fly ash such as cement manufacture, wastewater treatment, lightweight contraction aggregate, ceramic production, and secondary source in recovery of valuable elements. Present results compared with results of the Kemerkoy thermal power plants [?ahin Y, Karabulut A, Budak G. A practical method for the analysis of overlepped peaks in energy dispersive X-ray spectra. Appl Spectrosc Rev 1996;31:333-45].     

Elemental concentration analysis in some plant samples by EDXRF at Trabzon

The elemental analysis of some plant samples have been carried out in Trabzon region (Turkey) using energy-dispersive X-ray fluorescence (EDXRF) spectrometry. We have analyzed plant samples for nine stations using 1.85 GBq ⁵⁵Fe radioactive sources. We have found that potassium and calcium within 0.3-1.4% and 0.3-2.8% were present in concentration in plants for every station, respectively. The concentration of Cl and Ti generally changed according to the plant species and the sampling station.     

Analysis of trace elements in different three region coals in Erzurum (Turkey): a study using EDXRF

Analysis by energy dispersive X-ray fluorescence (EDXRF) spectroscopy of A?kale, Balkaya and Sütkans coal in Erzurum (Turkey) has been carried out for the determination of their elemental composition, using an annular and radioisotope source. The characteristic K X-rays of the different elements were detected with Si(Li) and Ge(Li) detectors. The analysis were performed on coal samples and the results were compared.     

Determination of gold and silver in dross using EDXRF technique

Gold and silver in dross were determined by energy‐dispersive X‐ray fluorescence technique. Sample was prepared by pressed pellet method using microcrystalline cellulose powder as binder, and a method of standard additions was used for quantification. L_β X‐ray of gold (11.4 keV) and K_β X‐ray of silver (24.9 keV) were used for analysis. The measured concentrations of gold and silver were 132 ± 8 and 1181 ± 84 mg kg^?1, respectively. The results were validated by instrumental neutron activation analysis technique. The t‐test indicated that there was no significant difference between results obtained by the two techniques. Energy‐dispersive X‐ray fluorescence is a simple, precise and accurate technique for the determination of gold and silver in dross. Copyright © 2014 John Wiley & Sons, Ltd.     

The determination of trace element concentrations in fly ash samples using ultrasound-assisted digestion followed with inductively coupled plasma optical emission spectrometry

A method of ultrasound-assisted digestion followed by inductively coupled plasma optical emission spectrometry (ICP-OES) used for the determination of trace element (chromium, copper, lead, nickel, vanadium and zinc) concentrations in fly ash samples was developed. All the measurements were performed in robust plasma conditions. Ultrasound-assisted digestion procedures using digestion solutions of aqua regia and hydrofluoric acid (HF) resulted in recovery rates of over 80% for all the analyte elements. Ultrasound-assisted two-step digestion with digestion solutions of 6 mL of HNO₃ (Step 1) and 3 mL of HNO₃ + 3 mL of HF (Step 2) resulted in recovery rates of over 92% for all the analyte elements with one exception, chromium, which had a recovery of about 85%. The analysis of SRM 1633b showed that the two-step ultrasound-assisted digestion method developed resulted in chromium, copper, nickel and zinc concentrations higher than the microwave digestion method standardized by the United States Environmental Protection Agency (USEPA method 3052). This is the very first time when a digestion method using ultrasound resulted in higher efficiency than microwave (USEPA method 3052) for chromium and nickel in very hard to dissolve samples. The major advantages of the ultrasound-assisted digestion over microwave digestion is the high treatment rate (about 30 samples simultaneously with a sonication time of 18 min) and the possibility to use new sample vessels without a significant increase in costs.     

EDXRF微量元素分析在文物断源断代中的研究

能量色散X荧光分析（EDXRF）是重要的元素成分析方法之一,现已成为一种强有力的定性和精确定量的无损分析测试技术。能量色散X荧光分析（EDXRF）技术具有不破坏分析样品,并能快速进行钠（Z11）至铀（Z92）的多元素的同时分析,以及分析的浓度范围宽广,精度高等特点,因此,特别适合于进行文物材料的成分分析研究,尤其适合测试极其珍贵的古陶瓷完整文物样品分析与鉴定。文章运用该方法对选自杭州南宋官窑窑址、龙泉古窑址出土的14个样品的南宋官窑青瓷、南宋龙泉窑青瓷和现代仿古青瓷等进行了元素分析的对比研究,分析测定古陶瓷样品中胎、釉的主、次量及微量元素组成,寻找组成中的“指纹”特征元素,试图为古陶瓷文物的断源、断代研究和真伪鉴定提供科学依据。研究结果表明能量色散X荧光分析（EDXRF）是一种较理想的文物研究和鉴定的科学分析手段。     

改进X荧光光谱仪快速检测土壤中重金属

针对传统能量色散X荧光仪(energy dispersive X-ray fluorescence,EDXRF)分析土壤中微量重金属测量精确度低的问题,提出了一种X荧光仪改进方法。为了减少反射X射线的影响,入射X射线垂直照射样品,探测器平行放置与样品一侧且垂直于X射线。样品与探测器之间由准直器连接。对国家标样测量结果表明,仪器对Mo,Zn,Cu,Pb,Zr,Nb的检出限为0.4,6.68,1.97,6.84,1.60,7.59 mg·kg-1。各元素对数偏差在0～0.05之间。元素含量在三倍检出限以上RSD%(GBW)小于7,元素含量在三倍检出限内RSD%(GBW)小于15。为了验证改进后X荧光仪测量效果,在大兴安岭地区采集土壤样品与传统荧光仪进行比较分析。改进X荧光仪提高了土壤中微量重金属测量精度,满足野外地质普查要求。     

Determination of K, Ca, Fe and Ni in Leptinotarsa decemlineata (Say) by EDXRF spectroscopy

The metal content of Colorado potato beetles elytra in Turkey was determined using the energy dispersive X-ray fluorescence method. A radioisotope excited X-ray fluorescence analysis using the method of standard addition is applied for the elemental analysis of Colorado potato beetles elytra. An annular ²⁴¹Am radioactive source and an annular ⁵⁵Fe radioactive source were used for excitation of characteristic K X-rays. An Si(Li) detector which has a full-width at half-maximum for photons was used for intensity measurements. The procedure of sample preparation and the results of analysis were presented.     

一件战国琉璃环的EDXRF无损分析

利用EDXRF探针,对一件战国时期的琉璃环进行了无损分析,以研究其化学组成特点及产地.分析表明,这件琉璃制品的化学组成属PbO-BaO-SiO2系统,与中国春秋至东汉时期特有的铅钡硅酸盐玻璃的化学组成一致,因此判断该制品是利用我国特有的技术和原料配方,在中国制成.但从外观来判断,该琉璃制品与成熟的玻璃差异较大,而更象是...     

商周原始瓷的EDXRF无损分析

采用能量色散X射线荧光(EDXRF)经验系数法，对江西吴城遗址出土的商代原始瓷残片中主、次量元素含量进行了无损测试，根据仪器提供的强度校正方程，用已知成分的陶瓷标准参考物求出校正系数，进行基体校正，所得结果与前人的研究工作颇为吻合。该法能满足考古样品分析的要求，特别适用于古陶瓷样品的无损检测。     

用能量色散型X荧光法测定超高磷铸铁中的磷

本文研制的超高磷铸铁标样成分均匀、定值准确、含量范围宽。应用能量色散型Ｘ荧光光谱分析和粉未压片法对样品中的磷进行了测定。在测定过程中改进了粉未压片工艺和Ｌｕｃａｓ－Ｔｏｏｔｈ强度校正软件。本方法快速简便，分析结果令人满意。     

矿山尾矿中微量银元素快速检测方法的研究

针对矿山尾矿中微量银元素测定的技术难题,提出了一种基于超短光路原理的能量色散X荧光能谱快速检测的方法。提高元素测量分辨率,提高样品分析效率,降低光管功率,延长仪器使用寿命。能谱系统优化了滤片以及探测器屏蔽物等设计,准直器采用对X射线基本无散射的聚四氟乙烯,达到微量银元素的检测要求。实际尾矿测试中,银的检出限达到0.1 mg·kg-1,RSD在0.1%～2.6%之间,准确度在87%～115%之间。对比尾矿、原矿及精矿的检测实验,证明了在能量色散X荧光能谱中引入超短光路设计方法,能够提升系统峰/本底比,满足微量银元素的检测要求。     

电感耦合等离子体原子发射光谱法同时测定槲寄生中的微量元素

采用硝酸-双氧水对槲寄生全药及煎煮液进行湿法消解,用电感耦合等离子体原子发射光谱法(ICP-AES)同时测定试样中Cu,Mg,Zn,Mn,Ni,Se,K,Na,Ca和Fe等元素的含量。该法的的加标回收率为91.6％～108.9％,变异系数为0.47％～4.59％,具有良好的准确度和精密度。结果表明：槲寄生中含有丰富的K和Ca元素,Na和Mg的含量也相对丰富,为进一步研究槲寄生的药理提供了科学的数据。     

光电直读光谱法测定纯金属中的痕量元素

光电直读光谱法评价分析低含量元素的重要依据是：检测限、精密度、稳定性。通过对光电直读光谱法测量纯金属中痕量元素分析条件的研究,发现被测元素的检出限主要取决于所选择的分析谱线及放电类型,与参比线基本无关;被测元素的测量精密度及稳定性主要取决于分析线对（分析谱线／参比线）及放电类型。这个规律可用于选择最佳测量条件,快速准确地测定纯金属中痕量元素。     

景德镇釉上彩绘瓷器釉上彩的Raman与EDXRF分析

釉上彩绘瓷器是我国古陶瓷中重要品类之一,具有极高的艺术价值和科学价值。采用拉曼光谱和能量色散X射线荧光分析等无损技术手段,对陶瓷釉彩的元素组成和物相组成综合分析,探讨了人们广为关注的景德镇元、 明和清代釉上彩绘瓷若干典型颜料种类的组成配方及其相应的呈色机制。研究发现景德镇古代红绿彩、 五彩、 粉彩等标本中的深红釉上彩料为赤铁矿着色,黄彩为铅锡黄着色,胭脂红彩则由含量不到0.1%的金所着色,绿料皆为二价铜离子着色。研究结果也进一步说明了Raman和EDXRF这两种无损、 微区分析技术的有效结合可以在深化陶瓷类文物的分析研究,尤其是针对图案交错复杂的多种彩绘颜料研究方面起到重要的作用。     

X射线荧光能谱法测定贵金属含量的测量不确定度分析

研究了 X射线荧光能谱法测定贵金属含量的不确定度来源 ,通过 A类评定和 B类评定方法建立了测量结果不确定度的评定程序 ,使测量结果更具有科学性 ,从而能够规范地、定量地进行产品合格判定     

Trace element changes during hibernation of Drosophila melanogaster by WDXRF analyses at chilling temperature

Fruit flies (Drosophila melanogaster) were exposed to low temperature (4 °C, 3d), after controlled acclimation (15 °C, 1d) and passed to artificial hibernation. The concentrations of elements in almost 1000 mature flies were measured by Wavelength-Dispersive X-ray Fluorescence (WDXRF) spectrometry. Concentration changes of Zn, K, S, Ca (33.5%, 11.2%, 10.3% and 7.5%, respectively) and especially Cr and Mn (99.90 and 99.60) were observed. Concentrations of Cr, Zn, S and Ca increased significantly, but concentrations of Mn and K decreased in with comparison to the control group.