亚甲基蓝B - (NH4)2S2O8反应体系在动力学光度法测定柠檬酸缓冲介质中钯的应用

IF 0.8 4区工程技术 Q4 ENGINEERING, CHEMICAL

Hemijska Industrija Pub Date : 2017-05-13 DOI:10.2298/HEMIND140821080R

S. Rančić, S. Nikolić-Mandić, A. Bojić, Snežana M. Đorić-Veljković, A. Zarubica, P. Janković

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引用次数: 0

摘要

本文介绍了一种新的、简便、快速、灵敏、选择性强的动力学光度法测定痕量钯。它是基于钯离子在柠檬酸缓冲液（BUF）中对（NH4）2S2O8（APS）氧化亚甲蓝B（MBB）的催化作用。在25°C的工作温度和662.4nm的波长下，找到了钯的最佳测定条件。对于所研究的Pd（II）浓度范围，发现RSD值为2.6至4.9%。检测限（LD）为2.0 ng cm–3 Pd（II），定量限（LQ）为6.9 ng cm–3。反应混合物中只有Pb2+、Hg2+和Sn2+的存在会干扰该方法对钯的测定，而Au3+和Ag+对反应速率有催化作用。通过这种方法，可以测定浓度范围为3.3´10–8至1.0´10-6 g cm–3的Pd（II）痕量。通过测定PtRhG合金和Pt粉末中的Pd（II）痕量，证实了该方法。将获得的结果与ICP-OES方法获得的结果进行了比较，结果一致性良好。

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Application of the reaction system methylene blue B–(NH4)2S2O8 for the kinetic spectrophotometric determination of palladium in citric buffer media

A new, simple, rapid, sensitive and selective kinetic spectrophotometric method for Pd(II) traces determination was elaborated in this paper. It is based on the catalytic effect of palladium ions upon the oxidation of methylene blue B (MBB) by (NH 4 ) 2 S 2 O 8 (APS) in citric buffer (BUF) solution. At the working temperature of 25 °C and the wavelength of 662.4 nm, the optimal conditions for palladium determination were found. RSD value was found to be 2.6 to 4.9% for the investigated concentration range of Pd(II). Limit of detection ( LD ) was found to be 2.0 ng cm –3 Pd(II), and limit of quantification ( LQ ) is 6.9 ng cm –3 Pd(II). Only the presence of Pb 2+ , Hg 2+ and Sn 2+ in the reaction mixture interferes the determination of palladium by this method, while Au 3+ and Ag + have the catalytic effect upon the reaction rate. By this method, it is possible to determine the Pd(II) traces in the concentration range of 3.3´10 –8 to 1.0´10 –6 g cm –3 . The method was confirmed by determination of Pd(II) traces in alloy PtRhG as well as in the powder of Pt. The obtained results were compared to those obtained by ICP-OES method and good agreement of results was found.

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来源期刊

Hemijska Industrija 工程技术-工程：化工

CiteScore

1.60

自引率

11.10%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal Hemijska industrija (abbreviation Hem. Ind.) is publishing papers in the field of Chemical Engineering (Transport phenomena; Process Modeling, Simulation and Optimization; Thermodynamics; Separation Processes; Reactor Engineering; Electrochemical Engineering; Petrochemical Engineering), Biochemical Engineering (Bioreactors; Protein Engineering; Kinetics of Bioprocesses), Engineering of Materials (Polymers; Metal materials; Non-metal materials; Biomaterials), Environmental Engineeringand Applied Chemistry. The journal is published bimonthly by the Association of Chemical Engineers of Serbia (a member of EFCE - European Federation of Chemical Engineering). In addition to professional articles of importance to industry, scientific research papers are published, not only from our country but from all over the world. It also contains topics such as business news, science and technology news, information on new apparatus and equipment, and articles on environmental protection.