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Performance Parameters of Inductively Coupled Plasma Optical Emission Spectrometry and Graphite Furnace Atomic Absorption Spectrometry Techniques for Pd and Pt Determination in Automotive Catalysts

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National Institute for Research and Development of Optoelectronics Bucharest, Research Institute for Analytical Instrumentation, 400293 Cluj-Napoca, Romania
2
Fraunhofer Institute for Chemical Technology ICT, Department Environmental Engineering, Group Reaction and Separation Techniques, 76327 Pfinztal, Germany
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Innovation Fluides Supercritiques (IFS), Bâtiment INEED, BP16109, 26300 Alixan, France
4
Institut Charles Gerhardt Montpellier (ICGM), Univ Montpellier, CNRS, ENSCM, 34095 Montpellier, France
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(22), 5136; https://doi.org/10.3390/ma13225136
Received: 13 October 2020 / Revised: 9 November 2020 / Accepted: 12 November 2020 / Published: 14 November 2020
(This article belongs to the Special Issue Physico-Chemical Analysis of Engineered Nanomaterials)
Palladium (Pd) and platinum (Pt) are extensively used as catalysts in the petrochemical and automotive industries, and due to high demand for them on the market, their recycling from spent supported catalysts is clearly needed. To assess the content of Pd and Pt in catalysts in order to establish their commercial value or to evaluate the recovery efficiency of technologies used for recycling, reliable analytical methods for determination of these elements are required. Spectrometric methods, such as inductively coupled plasma optical emission spectrometry (ICP-OES) and graphite furnace atomic absorption spectrometry (GFAAS) are powerful tools that can be employed for the determination of Pd and Pt in various sample matrices. However, these methods allow only the injection of liquid samples. In this regard, the digestion of solid sample by microwave-assisted acid extraction procedures at high pressures and temperatures is often used. In this study, a microwave acid digestion method was optimized for the extraction of Pd and Pt from spent catalysts, using a four-step program, at a maximum 200 °C. The resulting solutions were analyzed using ICP-OES, at two different wavelengths for each metal (Pd at 340.458 and 363.470 nm, and Pt at 265.945 and 214.423 nm, respectively) and using GFAAS (Pd at 247.64 nm, Pt at 265.94 nm). Five types of spent catalyst were analyzed and the standard deviations of repeatability for five parallel samples were less than predicted relative standard deviations (PRSD%) calculated using Horvitz’s equation for all the analyzed samples. View Full-Text
Keywords: palladium; platinum; ICP-OES; catalysts; method validation; microwave digestion palladium; platinum; ICP-OES; catalysts; method validation; microwave digestion
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MDPI and ACS Style

Senila, M.; Cadar, O.; Senila, L.; Böringer, S.; Seaudeau-Pirouley, K.; Ruiu, A.; Lacroix-Desmazes, P. Performance Parameters of Inductively Coupled Plasma Optical Emission Spectrometry and Graphite Furnace Atomic Absorption Spectrometry Techniques for Pd and Pt Determination in Automotive Catalysts. Materials 2020, 13, 5136. https://doi.org/10.3390/ma13225136

AMA Style

Senila M, Cadar O, Senila L, Böringer S, Seaudeau-Pirouley K, Ruiu A, Lacroix-Desmazes P. Performance Parameters of Inductively Coupled Plasma Optical Emission Spectrometry and Graphite Furnace Atomic Absorption Spectrometry Techniques for Pd and Pt Determination in Automotive Catalysts. Materials. 2020; 13(22):5136. https://doi.org/10.3390/ma13225136

Chicago/Turabian Style

Senila, Marin, Oana Cadar, Lacrimioara Senila, Sarah Böringer, Karine Seaudeau-Pirouley, Andrea Ruiu, and Patrick Lacroix-Desmazes. 2020. "Performance Parameters of Inductively Coupled Plasma Optical Emission Spectrometry and Graphite Furnace Atomic Absorption Spectrometry Techniques for Pd and Pt Determination in Automotive Catalysts" Materials 13, no. 22: 5136. https://doi.org/10.3390/ma13225136

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