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钼的光度分析近况 总被引:4,自引:0,他引:4
王明 《理化检验(化学分册)》2000,36(8):379-381,384
评述了国内钼的光度分析近况。内容包括新高灵敏试剂法、普通光度法、动力学光度光、荧光及化学发光光度法、计算光度法及其它。共引用文献60篇。 相似文献
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对国内锶的光度法测定的近年进展概况作了评述,主要涉及自1984年到2006年间在各类显色剂的使用,以及在锶的光度测定中应用催化动力学反应及化学计量学方法等内容,引用文献61篇。 相似文献
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The main trends of the development of spectrophotometric methods for determining noble metals (NMs) are considered. One of these trends is the synthesis and study of new, highly sensitive and selective organic reagents for determining NMs in solutions and in solid phase. Another trend is the search for and development of new methodological approaches (techniques) and color reactions, including those that involve modified and immobilized reagents. The third trend includes the improvement of equipment and automation in FIA, CFA, derivative, rapid-scanning, and multiwavelength spectrophotometry. It also implies a new generation of instruments measuring the absorbance and reflectance of solid materials modified with organic reagents and with their NM complexes; microwave energy sources for the dissolution of samples, preparation of test solutions, and activation of photometric reactions; and multioperational analytical moduli for autoclave sample preparation with resistive heating. The present-day spectrophotometry can provide the determination of NMs in samples with concentrations from several to 10–4% (photometry and differential photometry) and down to 10–7% (test and sorption–spectroscopic methods based on photometry and diffuse-reflectance spectroscopy, including the use of chromaticity functions). 相似文献
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Three methods of determination for uranium and thorium traces and ultratraces in glass were developed: a simple and powerful ICP-MS method exhibiting limits of determination in the one ng/g-range; a complex method with end-determination by classical photometry and a limit of determination for U and Th of 20 ng/g; and a method with chelate-complex formation for U and Th and subsequent GC-detection with a 63Ni-ECD with limits of determination in the g/g-range. These methods are critically compared and tested for real type samples of special glasses.Abbreviations used AAS
Atomic absorption spectrophotometry
- ECD
Electron capture detector
- FOD
1,1,1,2,2,3,3-Heptafluoro-7,7-dimethyl-4,6-octanedion
- GC
Gas chromatography
- HFA
1,1,1,5,5,5-Hexafluoro-2,4-pentanedione
- ICP-AES, -MS
Inductively coupled plasma-atomic emission spectrometry, metry, -mass spectrometry
- LAS
Liquid absorption spectrophotometry = classical photometry
- NAA
Neutron activation analysis
- NIST
National Institute of Standardization and Technology (Gaithersburg, U.S.A.)
- TBP
Tri-(n-butyl)-phosphate
- TFA
1,1,1-Trifluoro-2,4-pentanedione
- TTFA
1-(2-Thenoyl)-3,3,3-trifluoroacetone
- XRS
X-ray (fluorescence) spectrometry 相似文献