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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >H-point standard addition method - First derivative spectrophotometry for simultaneous determination of palladium and cobalt
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H-point standard addition method - First derivative spectrophotometry for simultaneous determination of palladium and cobalt

机译：H点标准添加方法-一阶导数分光光度法同时测定钯和钴

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摘要

H-point standard addition method (HPSAM) has been applied for simultaneous determination of palladium and cobalt in trace levels, using disodium 1-nitroso-2-naphthol-3, 6-disulphonate (nitroso-R salt) as a selective chromogenic reagent. Palladium and cobalt in the neutral pHs form red color complexes with nitroso-R in aqueous solutions and making spectrophotometric monitoring possible. Simultaneous determination of palladium and cobalt were performed by HPSAM-first derivative spectrophotometry. First derivative signals at the two pairs of wavelengths, 523 and 589 nm or 513 and 554 nm were monitored with the addition of standard solutions of palladium or cobalt, respectively. The method is able to accurately determine palladium/cobalt ratio 1:10 to 15:1 (wt/wt). Accuracy and reproducibility of the determination method on the various amounts of palladium and cobalt known were evaluated in their binary mixtures. To investigate selectivity of the method and to ensure that no serious interferences were observed the effects of diverse ions on the determination of palladium and cobalt were also studied. The recommended procedure was successfully applied to real and synthetic cobalt or palladium alloys, B-complex ampoules. a palladium-charcoal mixture and real water matrices. (c) 2005 Published by Elsevier B.V.
机译：H点标准添加方法（HPSAM）已用于同时测定痕量水平的钯和钴，使用1-亚硝基-2-萘酚-3,6-二磺酸钠（亚硝基R盐）作为选择性显色试剂。钯和钴在中性pH值下与亚硝基R在水溶液中形成红色络合物，使得分光光度法监测成为可能。通过HPSAM-一阶导数分光光度法同时测定钯和钴。通过分别添加钯或钴的标准溶液来监测两对波长分别为523和589 nm或513和554 nm的一阶导数信号。该方法能够准确确定钯/钴比为1:10至15：1（wt / wt）。以其二元混合物形式评估了各种已知钯和钴含量的测定方法的准确性和可重复性。为了研究该方法的选择性并确保没有观察到严重的干扰，还研究了各种离子对钯和钴测定的影响。推荐的方法已成功应用于真实和合成的钴或钯合金，B复合安瓿瓶。钯-木炭混合物和真水基质。 （c）2005年由Elsevier B.V.

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