Direct atomic-absorption determination of platinum, palladium, and rhodium in dead ceramic-based autocatalysts

Determination of palladium, platinum and rhodium in used automobile catalysts and active pharmaceutical ingredients using high-resolution continuum source graphite furnace atomic absorption spectrometry and direct solid sample analysis

“…The high economic value of the PGMs makes the recycling of the used catalysts necessary [5,31]. Thus, it is necessary to develop methods that allow the fast and reliable sorting on recovered materials, and traditionally the determination of Pd, Pt and Rh in these refractory and complex matrix requires the use of laborious and time consuming methods based on fire assay [15,31], or acid digestion with potentially dangerous acids such as HF and/or HClO 4 [8,31,32].…”

“…This aspect further complicates the process of sample dissolution and can contribute to the appearance of interferences. In particular, it is well-known that the determination of these elements is often hampered by the occurrence of spectral overlaps for most spectroscopic techniques [4,5], even for the most selective ones, such as inductively coupled plasma mass spectrometry (ICP-MS) [3].…”

Atomic spectrometry update. Industrial analysis: metals, chemicals and advanced materials

“…450 Direct analysis of spent three way catalyst was not possible, because of a decrease in analyte signal with increasing concentration of matrix elements. Owing to the high price of PGM, analytical control of the extraction process is critical.…”

“…The first highlighted the matrix effects (spectral and non-spectral) caused by the common non-precious metals Al, Ce, Fe, Mg, Ti and Zr. 450 Direct analysis of spent three way catalyst was not possible, because of a decrease in analyte signal with increasing concentration of matrix elements. In addition, spectral interferences still remained a problem.…”

Anodic Stripping Tin Titration: A Method for the Voltammetric Determination of Platinum at Trace Levels

“…From an analytical chemist’s point of view, these are probably the reasons why we assisted in the development of various methods for the determination of platinum on different samples in the last two decades: depending on the matrix and on the concentration level to be determined, several spectrometric techniques such as XRF, AAS, ICP-OES, and ICP-MS may be successfully used to investigate samples like exhausted catalysts, road dust, particulate matter, vegetation, soil, water, and biological materials. − …”