On-line ion-exchange preconcentration and determination of traces of platinum by electrothermal atomic absorption spectrometry

García, M. M. González; Rojas, F. Sánchez; Ojeda, C. Bosch; deTorres, A. García; Pavón, J. M. Cano
April 2003
Analytical & Bioanalytical Chemistry;Apr2003, Vol. 375 Issue 8, p1229
Academic Journal
A method to determine trace amounts of platinum in different samples based on electrothermal atomic absorption spectrometry is described. The preconcentration step is performed on a chelating resin microcolumn [1,5-bis(2-pyridyl)-3-sulfophenyl methylene thiocarbonohydrazide (PSTH) immobilized on an anion-exchange resin (Dowex 1×8–200)] placed in the autosampler arm. The combination of a peristaltic pump for sample loading and the atomic absorption spectrometer pumps for elution through a selection valve simplifies the hardware. The peristaltic pump and the selection valve are easily controlled electronically with two switches placed in the autosampler, which are activated when the autosampler arm is down. Thus, the process is fully automated without any modification of the software of the atomic absorption spectrometer. Under the optimum conditions with a 60-s preconcentration time, a sample flow rate of 2.4 mL min-1, and an injection volume of eluent of 40 µL, a linear calibration graph was obtained in the range 0–100 ng mL-1. The enrichment factor was 14. The detection limit under these conditions is 1 ng mL-1, and the relative standard deviation (RSD) is 1.6% for 10 ng mL-1 of Pt. The method has been applied to the determination of platinum in catalyst, vegetation, soil, and natural water samples. The results showed good agreement with the certified value and the recoveries of Pt added to samples were 98–105%.


Related Articles

  • A Mass Spectrometry Primer: Part I. Balogh, Michael P. // LC-GC North America;Aug2008, Vol. 26 Issue 8, p698 

    The article presents a study of mass spectrometry (MS) primer. It states that the primer covers a wide range of topics related to modern MS practices and answers some frequently asked questions about the use and capabilities of mass spectrometers. The study examines the application mass...

  • spectrometry.  // Taber's Cyclopedic Medical Dictionary;2005, p2034 

    A definition of the term "spectrometry" is presented. It refers to the process of determining the wavelength of light rays by use of a spectrometer.

  • Fast magneto-optical spectrometry by spectrometer. Du, G. X.; Saito, S.; Takahashi, M. // Review of Scientific Instruments;Jan2012, Vol. 83 Issue 1, p013103 

    Time efficient measurement of the spectroscopic magneto-optical (MO) activity of materials has always been desirable. In conventional MO systems, the monochromator produces quasi-monochromatic light in a narrow wavelength window. Therefore, to measure the spectroscopic MO activity, a large...

  • Determination of rhodium in water samples using cloud point extraction (CPE) coupled with flame atomic absorption spectrometry (FAAS). Suvardhan, Kanchi; Suresh Kumar, Kailasa; Rekha, Dasari; Subrahmanyam, Pantrangam; Kiran, Kapuvedi; Jayaraj, Bellum; Ramanaiah, Surasura; Janardhanam, Kandhukuri; Chiranjeevi, Pattium // Microchimica Acta;Mar2007, Vol. 157 Issue 3/4, p237 

    Cloud point extraction was applied as a method for preconcentration of rhodium after formation of a complex with 2-propylpiperidine-1-carbodithioate (2-PPC), and later determined by flame atomic absorption spectrometry using TritonX-114 as surfactant. Rhodium was complexed with 2-PPC in an...

  • Particle mass yield in secondary organic aerosol formed by the dark zonolysis of α-pinene. Shilling, J. E.; Chen, Q.; King, S. M.; Rosenoern, T.; Kroll, J. H.; Worsnop, D. R.; McKinney, K. A.; Martin, S. T. // Atmospheric Chemistry & Physics;2008, Vol. 8 Issue 7, p2073 

    The yield of particle mass in secondary organic aerosol (SOA) formed by dark ozonolysis was measured for 0.3-22.8 ppbv of reacted α-pinene. Most experiments were conducted using a continuous-flow chamber, allowing nearly constant SOA concentration and chemical composition for several days....

  • A Fuzzy ARTMAP Approach To The Incorporation Of Chromatographic Retention Time Information To An MS Based E-Nose. Burian, Cosmin; Brezmes, Jesus; Vinaixa, Maria; Llobet, Eduard; Vilanova, Xavier; Cañellas, Nicolau; Correig, Xavier // AIP Conference Proceedings;May2009, Vol. 1137 Issue 1, p570 

    This paper presents the work done with Fuzzy ARTMAP neural networks in order to improve the performance of mass spectrometry-based electronic noses using the time retention of a chromatographic column as additional information. Solutions of nine isomers of dimethylphenols and ethylphenols were...

  • A New Perspective on the Challenges of Mass Spectrometry. Impey, Gary; Hunter, Christie; Schreiber, Andre // Spectroscopy;Nov2008 Current Trends in Mass Spec, p10 

    The article focuses on the perspective on the challenges of mass spectrometry. It states that laboratories deeply involved in the complexities of drug discovery and development, proteomics, and food and water testing are becoming increasingly dependent on the advance mass spectrometers. However,...

  • Mass spectrometry determination of the isotopic composition of uranium hexafluoride. Saprygin, A.; Elistratov, O.; Kalashnikov, V.; Kulik, I.; Rodichev, I. // Journal of Analytical Chemistry;Dec2011, Vol. 66 Issue 14, p1385 

    An absolute method for the determination of isotopic composition of substances in multiple collector mass spectrometers was proposed. The detailed analysi of terms used in the method for the determination of the isotopic composition of uranium hexafluoride was given. Parabolic nature of...

  • Laboratory spectroscopic calibration of infrared tunable laser spectrometers for the in situ sensing of the Earth and Martian atmospheres. Zeninari, V.; Parvitte, B.; Joly, L.; Le Barbu, T.; Amarouche, N.; Durry, G. // Applied Physics B: Lasers & Optics;Nov2006, Vol. 85 Issue 2/3, p265 

    This paper reports the laboratory spectroscopic calibration of near- and mid- infrared tunable laser spectrometers used to determine in situ trace gases in the middle atmosphere of the Earth or in development for the investigation of the Martian atmosphere. The use of infrared absorption...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics