| 词条 | Glow-discharge optical emission spectroscopy |
| 释义 |
Ordinary Atomic spectroscopy can be used to determine the surface of a material, but not its layered structure. In contrast, GDOES gradually ablates the layers of the sample, revealing the deeper structure. GDOES spectroscopy can be used for the quantitative and qualitative determination of elements and is therefore a method of analytical chemistry. ProcessThe metallic samples are used as a cathode in a direct current plasma. From the surface, the sample is removed in layers by sputtering with argon ions. The removed atoms pass into the plasma by diffusion. Photons are emitted with excited waves and have characteristic wavelengths which are recorded by means of a downstream spectrometerand subsequently quantified. When using a high-frequency alternating voltage for plasma generation and the corresponding construction of the glow discharge source, non-metallic samples can also be examined. Various instruments are used as sensors. Photomultipliers can detect the slightest traces and also high concentrations of the sensor-specific element. By means of charge-coupled device, a complete element spectrum can be measured with the appropriate layer thickness. ApplicationsGlow discharge spectroscopy is an established method for the characterization of steels and varnishes. Recent developments relate to the analysis of porous electrodes from lithium-ion batteries.[3][4] Further reading
References1. ^{{cite journal|last1=Grimm|first1=W.|title=Eine neue glimmentladungslampe für die optische emissionsspektralanalyse|journal=Spectrochimica Acta Part B: Atomic Spectroscopy|volume=23|issue=7|year=1968|pages=443–454|issn=05848547|doi=10.1016/0584-8547(68)80023-0|bibcode=1968AcSpe..23..443G}} 2. ^{{cite patent| country =United States | number =US3543077| status = Patent | title =Glow discharge tube for spectral analysis | pubdate =November 24, 1970 | gdate = | fdate =June 7, 1968 | pridate =June 10, 1967 | inventor =Grimm Werner| invent1 = | invent2 = | assign1 =Rsv Prazisionsmessgerate Gmbh | assign2 = | class = | url =https://www.google.com/patents/US3543077 }} 3. ^{{cite journal|last1=Takahara|first1=Hikari|last2=Shikano|first2=Masahiro|last3=Kobayashi|first3=Hironori|title=Quantification of lithium in LIB electrodes with glow discharge optical emission spectroscopy (GD-OES)|journal=Journal of Power Sources|volume=244|year=2013|pages=252–258|issn=03787753|doi=10.1016/j.jpowsour.2013.01.109}} 4. ^{{cite journal|last1=Ghanbari|first1=N.|last2=Waldmann|first2=T.|last3=Kasper|first3=M.|last4=Axmann|first4=P.|last5=Wohlfahrt-Mehrens|first5=M.|title=Detection of Li Deposition by Glow Discharge Optical Emission Spectroscopy in Post-Mortem Analysis|journal=ECS Electrochemistry Letters|volume=4|issue=9|year=2015|pages=A100–A102|issn=2162-8726|doi=10.1149/2.0041509eel}} External links
1 : Spectroscopy |
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