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Diode laser thermal vaporization inductively coupled plasma mass spectrometry

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FOLTYNOVÁ Pavla KANICKÝ Viktor PREISLER Jan

Druh Článek v odborném periodiku
Časopis / Zdroj Analytical Chemistry
Fakulta / Pracoviště MU

Přírodovědecká fakulta Středoevropský technologický institut

Citace
WWW http://pubs.acs.org/journals/ancham/index.html
Doi http://dx.doi.org/10.1021/ac202884m
Obor Analytická chemie, separace
Klíčová slova Laser ablation; inductively coupled plasma; mass spectrometry; sample introduction; diode laser; pyrolysis; thermal vaporization
Popis An approach of sample introduction for inductively coupled mass spectrometry (ICPMS), diode laser thermal vaporization (DLTV) is described. The method allows quantitative determination of metals in submicroliter volumes of liquid samples. Laser power is sufficient to induce pyrolysis of a suitable substrate with the deposited sample leading to aerosol generation. Unlike existing sample introduction systems based on laser ablation, it uses a NIR diode laser rather than an expensive high-energy pulsed laser. For certain elements, this sample introduction technique may serve as an alternative to solution analysis with conventional nebulizers. Using a prearranged calibration set, DLTV ICPMS provides rapid and reproducible sample analysis (RSD 10%). Sample preparation is fast and simple, and the prepared samples can easily be archived and transported. The limits of detection for Co, Ni, Zn, Mo, Cd, Sn, and Pb deposited on the preprinted paper were found to be in the range of 0.4–30 pg. The method was characterized, optimized, and applied to the determination of Co in a drug preparation, Pb in whole blood, and Sn in food samples without any sample pretreatment.
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