Microwave-assisted digestion procedure for the determination of palladium in road dust

Long-Term Monitoring of Palladium and Platinum Contents in Road Dust of the City of Munich, Germany

“…In some cases this problem can be overcome by the addition of boric acid and the resulting formation of tetrafluoroborate (BF 4 − ). Tetrafluoroborate does not attack quartz and glass ware or silicon based adsorption materials such as normal or reversed phase materials for solid phase extraction (Boch et al 2002) or application in chromatography.…”

“…In the present work the determination of palladium in traffic related tunnel dust from the outer city ring of Munich utilizing the developed FI-GFAAS system and a specifically optimized digestion procedure (Boch et al 2002) was continued and now includes the period from 1994 to 2012. For the determination of platinum in the same samples a new easy to perform separation and enrichment procedure based on cloud point extraction (CPE) with N,N-Di-(n-hexyl)-N'-benzoylthiourea (DHBT) as a selective reagent for complexation was used.…”

“…The enrichment procedure after sample digestion (Boch et al 2002) and complex formation is easy to perform and utilizes the formation of micelles in surfactant containing aqueous solutions. N,N-Dialkyl-N'-benzoylthioureas, particularly those substituted with long alkyl chains like N,N-Di-n-hexyl-N'-benzoylthiourea (DHBT), form neutral, apolar complex compounds which can be effectively incorporated within micelles.…”

Simplified Cloud Point Extraction-Flame Atomic Absorption Spectrometry for the Preconcentration/Analysis of Trace Palladium

“…But the concentration of palladium in environmental, geological and metallurgical materials is usually too low to be directly determined owing to insufficient sensitivity and matrix interferences 1,2 . Therefore, the application of highly sensitive techniques, ICP-AES 3,4 , ICP-MS 5,6 , GF AAS 7,8 , coupled with a separation and enrichment procedure is necessary [9][10][11][12][13][14] . In this paper, a new simplified cloud point extraction for trace palladium as a prior step to its determination by flame atomic absorption spectrometry has been developed.…”

Determinação de paládio em amostras biológicas aplicando técnicas analíticas nucleares

“…Entre os diversos métodos existentes para a determinação de Pd os mais utilizados são a análise por ativação com nêutrons (NAA), [3][4][5][6][7][8] a espectroscopia de massa com fonte de plasma acoplado indutivamente (ICP-MS), [9][10][11][12][13][14][15][16] de absorção atômica (AAS), 12,[17][18][19][20] de emissão óptica (OES), 21 de absorção atômica em forno de grafite (GF-AAS) 22-24 e de fluorescência de raios X (XRF). 25,26 As aplicações destas técnicas geralmente estão restritas à análise de amostras com nenhuma ou com baixa interferência na análise, de modo que comumente são utilizadas a pré-separação do Pd dos elementos interferentes e também a pré-concentração.…”