Laser-induced optical breakdown spectroscopy of polymer materials based on evaluation of molecular emission bands

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10359778" target="_blank" >RIV/00216208:11310/17:10359778 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.saa.2016.11.045" target="_blank" >https://doi.org/10.1016/j.saa.2016.11.045</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.saa.2016.11.045" target="_blank" >10.1016/j.saa.2016.11.045</a>

Result language

angličtina

Original language name

Laser-induced optical breakdown spectroscopy of polymer materials based on evaluation of molecular emission bands

Original language description

Laser-induced breakdown spectroscopy (LIBS) for composition analysis of polymer materials results in optical spectra containing atomic and ionic emission lines as well as molecular emission bands. In the present work, the molecular bands are analyzed to obtain spectroscopic information about the plasma state in an effort to quantify the content of different elements in the polymers. Polyethylene (PE) and a rubber material from tire production are investigated employing 157 nm F-2 laser and 532 nm Nd:YAG laser ablation in nitrogen and argon gas background or in air. The optical detection reaches from ultraviolet (UV) over the visible (VIS) to the near infrared (NIR) spectral range. In the UV/VIS range, intense molecular emissions, C-2 Swan and CN violet bands, are mea, sured with an Echelle spectrometer equipped with an intensified CCD camera. The measured molecular emission spectra can be fitted by vibrational-rotational transitions by open access programs and data sets with good agreement between measured and fitted spectra. The fits allow determining vibrational-rotational temperatures. A comparison to electronic temperatures T-e derived earlier from atomic carbon vacuum-UV (VUV) emission lines show differences, which can be related to different locations of the atomic and molecular species in the expanding plasma plume. In the NIR spectral region, we also observe the CN red bands with a conventional CDD Czerny Turner spectrometer. The emission of the three strong atomic sulfur lines between 920 and 925 nm is overlapped by these bands. Fitting of the CN red bands allows a separation of both spectral contributions. This makes a quantitative evaluation of sulfur contents in the start material in the order of 1 wt% feasible.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10403 - Physical chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy

ISSN

1386-1425

e-ISSN

—

Volume of the periodical

174

Issue of the periodical within the volume

5 March 2017

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

331-338

UT code for WoS article

000393628500044

EID of the result in the Scopus database

2-s2.0-85004010226