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Automated On-Line Preconcentration of Palladium on Different Sorbents and its Determination in Environmental Samples

✍ Scribed by Fuensanta Sánchez Rojas; Catalina Bosch Ojeda; José Manuel Cano Pavón

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
150 KB
Volume
97
Category
Article
ISSN
0003-4592

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✦ Synopsis

Abstract

The determination of noble metals in environmental samples is of increasing importance. Palladium is often employed as a catalyst in chemical industry and is also used with platinum and rhodium in motor car catalytic converters which might cause environmental pollution problems. Two different sorbents for palladium preconcentration in different samples were investigated: silica gel functionalized with 1,5‐bis(di‐2‐pyridyl)methylene tbiocarbohydrazide (DPTH‐gel) and [1,5‐Bis(2‐pyridyl)‐3‐sulphophenyI methylene thiocarbonohydrazide (PSTH) immobilised on an anion‐exchange resin (Dowex 1×8‐200)]. The sorbents were tested in a micro‐column, placed in the auto‐sampler arm, at the flow rate 2.8 mL min^‐1^. Elution was performed with 4 M HCl and 4 M HNO~3~, respectively. Satisfactory results were obtained for two sorbents.

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