Sánchez Rojas Fuensanta, Bosch Ojeda Catalina, Cano Pavón José Manuel
Department of Analytical Chemistry, Faculty of Sciences, University of Málaga, 29071 Málaga, Spain.
Ann Chim. 2007 Mar-Apr;97(3-4):265-76. doi: 10.1002/adic.200790010.
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 lx8-200)]. 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 HNO3, respectively. Satisfactory results were obtained for two sorbents.
环境样品中贵金属的测定变得越来越重要。钯在化学工业中常被用作催化剂，并且还与铂和铑一起用于汽车催化转化器中，这可能会引发环境污染问题。研究了两种用于不同样品中钯预富集的不同吸附剂：用1,5-双（二-2-吡啶基）亚甲基硫代碳酰肼（DPTH-凝胶）功能化的硅胶，以及固定在阴离子交换树脂（Dowex lx8-200）上的[1,5-双（2-吡啶基）-3-磺苯基亚甲基硫代碳酰肼（PSTH）]。这些吸附剂在置于自动进样器臂中的微柱中以2.8 mL min(-1)的流速进行测试。分别用4 M HCl和4 M HNO3进行洗脱。两种吸附剂均获得了满意的结果。
