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Radionuclide X-ray Fluorescence as an Alternative Method to Pharmacopeial Tests for Heavy Metals
Röntgenofluorescenčná spektrometria ako alternatívna metóda liekopisných skúšiek na ťažké kovy
Liekopisné skúšky na ťažké kovy vyžadujú porovnanie zafarbenia roztoku vzorky po pridaní tioacetamidového činidla s referenčným roztokom obsahujúcim známu koncentráciu Pb. Keďže táto skúška neinformuje o druhoch ťažkých kovov ani o koncentráciách každého z nich, čoraz viac sa využívajú inštrumentálne metódy, a to nielen AAS a AES, ale aj ICP, NAA a röntgenofluorescenčná analýza. Tieto metódy umožňujú rýchlu a presnú analýzu prvkového zloženia nečistoty, takže narastá ich význam v kontrole liekov a liečivých rastlín.
Klúčové slová:
ťažké kovy – limitné skúšky na ťažké kovy – AAS – ICP – röntgenofluorescenčná spektrometria
Authors: V. Jánošová; M. Sýkorová; O. Štroffeková; Emil Havránek
Authors‘ workplace: Univerzita Komenského v Bratislave, Farmaceutická fakulta, Katedra farmaceutickej analýzy a nukleárnej farmácie
Published in: Čes. slov. Farm., 2006; 55, 213-218
Category: Review Articles
Overview
Pharmacopeial tests for heavy metals require comparisons between test solution’s colour after addition of thioacetamide and a control solution containing a known quantity of Pb. As this test neither informs about the type of heavy metals, nor about the concentrations of each of them, there is a reason for more frequent employment of instrumental methods such as AAS and AES, as well as ICP, NAA, and X-ray fluorescence. These methods provide us with quick and exact elemental analyses of impurities, thus becoming more and more important in the quality control of drugs and medicinal plants.
Key words:
heavy metals – limit tests for heavy metals – AAS – ICP – X-ray fluorescence spectrometry
Labels
Pharmacy Clinical pharmacology
Article was published inCzech and Slovak Pharmacy
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