排序方式: 共有53条查询结果,搜索用时 890 毫秒
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火焰原子吸收法间接测定磷矿中氯 总被引:2,自引:0,他引:2
火焰原子吸收法间接测定磷矿中氯达刘生1云南个旧市化肥厂中心化验室个旧661411目前磷矿中Cl-含量的测定多采用浊度法、氯离子选择电极法及离子色谱法。本文采用火焰原子吸收法来间接测定磷矿中Cl-,即在试样溶液中加入定量的Ag+,试样中Cl-与Ag+生... 相似文献
2.
铋的原子吸收光谱分析进展 总被引:4,自引:0,他引:4
文章对1985年以来用原子吸收光谱法测定Bi的情况进行了综述,着重介绍了用氢化物发生法、石墨炉法和火焰法测Bi时,为了提高灵敏度所采用的各种氢化物发生装置及根据不同试样所使用的各种分离富集手段。主要参考文献101篇。 相似文献
3.
Janet M. Hergt L. Paul Bédard Etienne Deloule Kathryn L. Linge Paul J. Sylvester Michael Wiedenbeck Jon D. Woodhead 《Geostandards and Geoanalytical Research》2005,29(1):5-52
The articles that comprise this critical review serve to draw attention to research papers published in specific fields of interest during 2003, provide critical comment on the relevance and importance of individual publications in these fields, and offer an overview of the comparative importance of advances in particular areas. In this way, these articles aim to assist experts in the field by keeping them informed of relevant recent publications, as well as providing an important resource for students or early career researchers who are embarking on studies in an area new to them. This year, five papers provide summaries of developments in bulk sample determinations employing (1) ICP-AES and ICP-MS (trace elements), (2) XRF and atomic absorption spectrometry and INAA, (3) isotope ratio measurements (TIMS, MC-ICP-MS, ICP-MS, ToF), as well as in situ measurements conducted using (4) secondary ion mass spectrometry and (5) laser ablation ICP-MS (trace element and isotope ratio determinations). 相似文献
4.
一些新的稀释装置已用于原子发射光谱法和原子吸收分光光度法中,改变了以往预先配制浓度依次变化的标准系列的习惯做法。Ko(?)cielniak提出的一种非连续稀释方法,所配制溶液的浓度与稀释次数成指数关系。本文采用了这种技术对稀释装置作了改进,只需要一个小锥形瓶,添加或稀释同一个原始溶液便可制备出一系列标准溶液。设备简单、操作方便,用于原子吸收分光光度法测定钾长石中的钠、钾并与常规法对照结果满意。 相似文献
5.
本法采用氯酸钾-王水分解样品,选用硝酸镍作基体改进剂,提高了灰化温度。使用石墨杯原子化器,Zeeman效应扣除背景,实现了用石墨炉原子吸收法直接测定硅酸盐中微量砷。快速、简便,其绝对灵敏度达5.7×10~(-11)(g/l%),变动系数小于8%。 相似文献
6.
复杂矿石中滑石的测定 总被引:1,自引:1,他引:1
含滑石复杂矿石试样经650℃焙烧,使其中绿泥石、菱镁矿等变得能迅速溶于1+1 HCl中,而滑石溶解率很低。残渣用HF-HClO_4或KOH处理,用火焰原子吸收法或滴定法测定MgO,计算滑石量。10余种共存矿物在一定范围内不干扰测定。 相似文献
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This review describes developments major and in trace element determination using atomic absorption spectroscopy (AAS), inductively coupled plasma-atomic emission spectrometry (ICP-AES), instrumental neutron activation analysis (INAA), and X-ray fluorescence (XRF) spectrometry that were reported in 2008 and 2009. Publication levels were comparable to those of previous years, except for XRF which showed an increase in the number of articles published in the past 2 years. In terms of number of publications and impact, the most active field was AAS, while INAA was the least active. As expected for well-established and mature methods, novel developments for all four analytical techniques were relatively sparse. For AAS, the most notable publications concerned developments in sample introduction, particularly focussing on solid samples, increasing analyte sensitivity, and higher sample throughput. For ICP-AES, publication of developments in sample introduction, remediation of matrix effects and calibration continues. Compared with past years, there was a clear focus on sample preconcentration methods, but very few publications reporting new hyphenated speciation methods. For INAA, there were several publications exploring the accuracy and robustness of the method, as well as the requirements for INAA to meet criteria for a primary method of measurement. Two other related techniques, delayed neutron activation analysis, and prompt gamma activation analysis, were also described. Hyphenated XRF techniques showed interesting developments in enabling XRF and XRD analysis on the same spot, and further work characterising and calibrating three-dimensional micro-XRF shows promising results for investigating sample heterogeneity. 相似文献
9.
本文研究了锂、铷、铯三元素在丙酮有机溶剂中的行为,测定条件,干扰离子的影响及消除,使灵敏度分别比在水相中提高为2.5—3.5倍。方法灵敏度高,干扰少,测定范围为0~5PPM,适用于矿石中微量锂、铷、铯三元素同时测定。 相似文献
10.
对塞曼效应石墨炉原子吸收法对地质样中痕量银的测定进行了研究。简化了样品处理过程。对地质标样及实际样品分析获得了满意的结果加标回收率为96.2%-103.5%,相对标准偏差为3.04%-4.77%所采用的方法快速、简便,准确。 相似文献