On-line detection of heavy metals and brominated flame retardants in technical polymers with laser-induced breakdown spectrometry
| Autor: | Michael Stepputat, Reinhard Noll |
|---|---|
| Přispěvatelé: | Publica |
| Rok vydání: | 2003 |
| Předmět: |
chemistry.chemical_classification
Detection limit Spectrum analyzer Laser ablation Materials science business.industry Materials Science (miscellaneous) Analytical chemistry Conveyor belt Polymer Laser Mass spectrometry Industrial and Manufacturing Engineering law.invention Optics chemistry law Calibration Emission spectrum Laser-induced breakdown spectroscopy Business and International Management business |
| Zdroj: | Applied Optics. 42:6210 |
| ISSN: | 1539-4522 0003-6935 |
| DOI: | 10.1364/ao.42.006210 |
| Popis: | The use of laser-induced breakdown spectrometry (LIBS) for the analysis of heavy metals and brominated flame retardants in end-of-life waste electric and electronic equipment (EOL-WEEE) pieces is investigated. Single- and double-pulse plasma excitation as well as the influence of detection parameters is studied to yield a parameter field with improved sensitivity and limits of detection. A LIBS analyzer was set up as an on-line measuring unit to detect heavy metals and brominated flame retardants in moving EOL-WEEE pieces in an automatic sorting line. An autofocusing unit with an adjustment range of 50 mm was incorporated to permit measurements of objects that pass by a LIBS analyzer with their surfaces at various distances from it. Tests with EOL-WEEE monitor housings on the conveyor belt of a pilot sorting system successfully demonstrated the capability of the LIBS analyzer to quantify the concentration of hazardous elements in real waste EOL-WEEE pieces. |
| Databáze: | OpenAIRE |
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