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standard reference samples
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  标准参考样品
     Authors use method of percent added recovery for quality control in analysis of 4 pyrethoid pesticides,the standard reference samples of those are very diffic- ultly made.
     对于制作标准参考样品困难的拟除虫菊酯农药,作者应用百分比添加回收率的方法进行分析质量控制。
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  “standard reference samples”译为未确定词的双语例句
     The method has been applied to the determination of trace bismuth in geological standard reference samples and the results are in good agreement with the certified values with precision of 1.88%~5.57% RSD(n=12).
     方法的检出限(6s)为0.042μg/g,精密度(RSD,n=12)为1.88%~5.57%。 经国家一级地质标准物质验证,测定值与标准值吻合。
短句来源
     The detection limit of the method was 0 80 μg/mL with precision of 2 1%. The method was applied to the determination of Ga in standard reference samples with satisfictory results.
     该法检出限为 0 .80 μg/mL ,相对标准偏差为 2 .1 % ,用该法测得国家一级标准样品的结果均与推荐值相符
短句来源
     The detection limit was 0.046ng/mL and the precision was between 3.1~4.0%. The enrichment multiple was from 40 to 4 X 102. Measured values of molybdenum in national standard reference samples GBW07405 and GBW07103 by our established method were in good agreement with certified values.
     方法检出限为0.046 ng/mL,方法精密度为3.1~4 .0%,富集倍数为40至4XI护,测定国家一级标准物质GBW007405和GBW07 103中的痕量相,测定值与标准值相吻合。
短句来源
     Au, Pt and Pd are then eluted with 0.1 mol/L HCl30 g/L thiourea solution and determined by atomic absorption spectrometry. The method has been verified by determination of Au, Pt, Pd in standard reference samples.
     用0.1mol/LHCl-30g/L硫脲溶液以0.5mL/min的流速对被吸附的Au(Ⅲ)、Pt(Ⅳ)和Pd(Ⅱ)进行洗脱,洗脱率96%,最后用原子吸收光谱法进行测定。
短句来源
     Accuracy of the method wasevaluated through the analysis of 3 geochemical standard reference samples (GSS-1, 3,7)and was found to be in good agreement with the certified or recommended values.
     用本法对3个地球化学标准参考样(Gss-1,3,7)进行分析测定,其结果与这些标准样品的最佳估计值和推荐值非常地一致。
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  相似匹配句对
     Period Verification of Reference Standard
     参考标准的期间核查
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     With reference to B.F.
     本文参考 B.F.
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     Standard
     标准
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     REFERENCE
     每月参考
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     Which is the standard?
     采用什么标准评价?
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  standard reference samples
Checking wattmeters against standard reference samples of grain-oriented transformer steel
      
Accuracy and precision is assessed using standard reference samples.
      
A simple INAA using thermal column is effective for sodium determination in geochemical standard reference samples of peridotite and dolomite containing considerable amount of magnesia as one of the matrix elements.
      
The accuracy and precision of the method is demonstrated by intercomparison of the thorium standard reference samples S-14, S-15 and S-16 of IAEA.
      
The method has been tested by analysing several CRM standard reference samples and 304 and 316 steel samples assuming as unknown.
      
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Halogen are important indicators in geochemieal research andprospecting, therefore determination of halogen concentration in rock andgeochemical standard reference samples is essential. However, method forprecise determination of trace halogen is still a problem to be solved.This paper describes methods of thermal neutron rabbit and epithermalneutron activation analysis to dertermine Cl, Br, I in 18 standardsamplas of GSR, GSS and GSD series. Good result is obtained for Br.

鉴于卤素元素在地球化学研究及找矿中是重要的指示元素,因而在岩石、地球化学标准参考样中它们的定值是重要的,而痕量卤素元素的准确测试是尚待解决的问题。本文采用热中子短照及超热中子活化法测定GSR,GSS和GSD系列18个标准样中的氯、溴和碘含量,其中对溴的研究比较仔细,获得满意的结果。

In recent years, outstanding achievements have been gained in China in the exploration of gold using geocliemical methods. From 1980 to 1986, 81 new gold occurrences wore found, many of Which have been developed into economic deposits.Comparison of the philosophy and strategy of gold geochemical exploration in China and abroad has found that the effective use of geochemical methods for gold exploration in China relies heavily on the direct determination, of subtrace gold rather than the determination of pathfinder...

In recent years, outstanding achievements have been gained in China in the exploration of gold using geocliemical methods. From 1980 to 1986, 81 new gold occurrences wore found, many of Which have been developed into economic deposits.Comparison of the philosophy and strategy of gold geochemical exploration in China and abroad has found that the effective use of geochemical methods for gold exploration in China relies heavily on the direct determination, of subtrace gold rather than the determination of pathfinder elements or discrete gold in mineral concentrate. China's Regional Geochemistry-National Reconnaissance Project is one among the few national geochemical mapping projects which puts gold in its list of elements that ought to be analyzed.Several sensitive, rapid and low-cost analytical methods were developed to bring down the detection limit of gold to 0.3 ppb.The result is that more than 90% samples could yield reportable data, end the local high background values end the regional end local anomalies of gold could all be clearly displaged oa a geochemical map.The amount of information obtained is unparalleled comparing with whatsoever gold maps generated in other countries.It was found that large gold deposits or gold fields are always encicled by conspicuous regional gold anomalies with areal extension of several hundreds of square kilometers and threshold values of only a few ppb. These regional gold anomalies not only enlarge the scope of exploration targets but also provide a powerful means for discrimination large economic gold deposits from small gold occurrences during interpretation of geochemical maps. Another important feature in geochemical gold exploration in China is the extensive use of seven geochemical standard reference samples GAn 1-7 to monitor the gold analysis, thus makes the gold data of this national project comparable over the whole country.The highlight of gold exploration activities and the vast amount of information accumulated put forward new problems, end offer new opportunities for exploration geochemists.Several suggested research topics are listed below.1. Comprehensive study of the rsgiortal multi-element anomalies associated with gold minaralization. The vast amount of data obtained all over China are standardized and hence comparable.So it offers a chance unprecedented before for the systematic study of element association and element zoning of different types of gold mineralization and for the establishment of creiteria for interpretation, classi- fication and sorting of regional multi-element fnomalies ssociated with gold mineralization.2. The behavior of gold in surfacial environment, the study of the behavior of gold in the bio-chemical system of surfacial environment has attracted the interest of scientists from different disciplinss. The development of gold exploration techniques in the past including sampling, analysis and interpretation has deen largely based on the assumption that gold migrates in surfacialenvironment chiefly as discrete particles. The new idea that gold could migrate as ions, colloids or organic complexes will certainly innovate gold geochemical exploration techniques.3. Primary halos around gold deposits. Element association end element zoning of primary halos around gold deposits have not been studied as throughly as that around polymetallic, copper or tin and tungsten ore deposits. This kind of research must be strengthened to meet the great demand in detailed geochemical study of the targets sorted out after regional survey, in order to evaluate the potential of the anomalies and the erosion level of the predicted ore bodies and to discriminate between scattered and industrial gold mineralizations.4. New techniques in gold geochemical exploration. Because of the establishment of the hydromorphic migration of gold and the important role of vegetation end bacteria in transfering gold into soluble forms, we could see in the years to come the increased application of biogeocheinical and hydrogeochemical methods in the exploration of gold, especially

使用地球化学方法找寻金矿床近年来在我国取得突破性进展。这是因为我国将金列为区域化探全面扫面必分析的元素,将金的分析捡出限降至百亿分之几,并研制了高效率的能达到这样捡出限要求的分析方法。但今后要使化探找金的效果继续提高,还需加强研究工作,包括综合研究已发现的大量金与其伴生元素的区域异常,金在表生环境中的行为及金矿床的原生晕并探索找金的地球化学新技术。

Some topics about the preparation of the standard reference samples for the EPMA are

叙述了研制以天然矿物为电子探针标准样品的工作中,关于物质来源、样品均匀度检测和化学成份分析定值等方面的情况。文中列举实例,用来讨论一些实际问题。

 
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