共查询到20条相似文献，搜索用时 46 毫秒
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黄原酯棉(CCX)是金的良好的吸附体,本文将吸附了金的CCX用灰化法解脱。操作简单快速、成本低,灰化时无臭味、残渣少。浸取液用三正辛胺-TBP(1:3)混合萃取-金试剂液珠比色法测定Au,其液珠凝聚好,灵敏度高,选择性和稳定性都比单用TBP有所提高。方法的测定范围0.0005-xx g/t、配备金的野外快速分析箱,可作现场分析。 相似文献
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近年来由于金的普查找矿和成矿规律研究的需要,对金的分析测定提出更高的要求,需要测定地质样品中0.001克/吨,甚至更低含量的金。火焰原子吸收法难以满足这一要求,无火焰原子吸收法测定矿物中微量金已有不少报导。各方法的差异仅是分离富集手段不同。目前广泛采用的分离富集手段有溶剂萃取、离子交换、共沉淀、活性炭吸附和反相萃取色层法等。这些方法均能获得满意的分离富集效果。 相似文献
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在２．０％ＨＣｌ及加入少量饱和溴水的条件下，用泡沫塑料吸附富集金。用１．０％硫脲溶液热浸提取金，然后用涂层石墨管和平台，无火焰原子吸收分光光度计测定天然水中痕量金的含量。该方法简单、可靠。 相似文献
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火焰原子荧光光谱法(FAFS)测定痕量金的灵敏度好、稳定性高及线性范围广,但在测定时干扰极为严重,如果干扰元素不加以分离或扣除,对0.5ng/g以下金无法进行准确测定。本方法在传统泡塑分离富集金的基础上,研究了FAFS法测定痕量金的最佳条件:在选定仪器条件下,提出了选择低背景值(≤0.25ng/g Au)泡塑分离富集Au,采用3.0g/L硫脲-1%盐酸为解脱液可消除记忆效应,在标准系列中加入5μg/mL的Fe3+溶液扣除铁对测定金的干扰。采用本分析方法对国家标准物质GBW07805、GBW07242、GBW07244a、GBW07245a和GBW07247进行测定,相对误差≤4.7%,相对标准偏差(RSD)≤23.2%;采用FAFS法与ICP-MS法对90个原生晕样品和4个控制样品中痕量金同时进行测定,两组测定结果数统计分析的F检验值为1.23,相关系数为1.01,符合性较好,无显著性差异。本分析方法简便、快速与实用,金检出限为0.08ng/g,线性范围为0.08~500ng/g,可达3个数量级。 相似文献
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在王水介质条件下,用自行设计的微色谱柱在线分离富集系统分离富集矿石样品中的痕量金,采用火焰原子吸收光谱法进行测定。在原子吸收光谱仪吸喷溶液的流路上,用P350微色谱柱研究了金的分离富集条件,采用快速吸附和快速洗脱技术,以盐酸溶液为淋洗液,亚硫酸钠溶液为洗脱液,测定一个样品整个分离和测定过程仅需1 min,成功地克服了火焰原子吸收光谱法测定金灵敏度低的缺点。方法的相对标准偏差小于3.2%,检出限为0.078μg/g。与现行离线分离富集方法相比,建立的方法具有高效、快速、成本低廉的优点,经实际样品验证获得了较为满意的结果。 相似文献
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火焰原子吸收光谱法测定高品位金矿石中的金 总被引：4，自引：4，他引：0
采用经典火试金法测定高品位金,操作流程长,影响因素多,在铅扣灰吹过程中易挥发选出大量的铅,对实验环境造成严重污染.本文将20.0～100.0 g取样量先分成若干小样量进行焙烧,经50％王水完全分解后分离滤渣,所得若干份滤液定容于同一容量瓶内,分取适量体积进行泡沫塑料富集,将富集金的泡沫塑料灰化后用浓王水复溶,以火焰原子吸收光谱法(FAAS)测定高品位金矿石中金的含量.方法检出限为0.101 μg/g,通过多个国家一级标准物质和分析样品验证,准确度和精密度满足相关要求.此方法测定灵敏度高,取样量为20.0 ～ 100.0 g,有效地提高FAAS法取样代表性,同时拓展了FAAS法测定矿石中金的含量范围,针对50.0 ～ 550.0 μg/g中高含量段的金结果同样可靠. 相似文献
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煤燃烧时,其中汞分解为蒸气随着煤燃烧后排出的废气一起进入大气造成公害。因此准确地测出煤中汞的含量对煤的利用和环境保护都有重大意义。笔者1984年研究和比较了酸液消化-无火焰原子吸收分光光度法,氧瓶燃烧无火焰原子吸收光光度法,氧弹燃烧-无火焰原子吸收分光光度和汞齐化-无火焰原子荧光光谱法等四种方法对水、食品、矿石和煤中微量汞的测定文献后,采用了最后一种方法测定煤中微量汞,通过实践获得了一些经验,现提出供参考、探讨。 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level 相似文献
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正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7), 相似文献
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正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci- 相似文献
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正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli- 相似文献
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正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.) 相似文献
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正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861 相似文献
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正20141768 An Shaopeng(Institute of Rock and Soil Mechannics,Chinese Academy of Sciences,Wuhan 430071,China);Wei Lide Experimental Study on Mechanical Behavior of Xigeda Formation Siltstone and Structure Interface(Journal of Engineering Geology,ISSN1004-9665,CN11-3249/P,21(5),2013,p.702-708,9illus.,1 table,16 refs.) 相似文献