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SELECTED ELECTROANALYTICAL DETERMINATION METHODS OF ZINC IN MATERIALS OF DIFFERENT ORIGINS

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Zając M., Rojowski J., Szlósarczyk M.
Medicina Internacia Revuo
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2012
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vol. 25
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issue 99
70-73
EN
Zinc is a naturally wide spread element, which generally finds its use in industry but also in numerous pharmaceutical, cosmetic and stomatology materials. Taking into consideration its frequent occurrence (in almost all biological materials) and its low quantities, a good choice of analytical method for zinc assay is a necessity. Apart from spectrophotometric methods – especially AAS (Atomic Absorption Spectrometry) which is a method of choice for zinc determination, also electroanalytical methods are used. Most frequently ASV (Anodic Stripping Voltammetry) or Polarography is applied. Despite the need of samples digestion electrochemical methods offer a price convenient method for determination of zinc, even in trace amounts (ppt – parts per trillion). Currently there is also new information about ion selective electrodes suitable for zinc assay.
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The determination of molybdenum in selected mushrooms by stripping voltammetry

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Piech R., Niewiara E., Paczosa-Bator B., Szlósarczyk M.
Open Chemistry
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2011
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vol. 9
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issue 2
352-356
EN
The highly sensitive method of adsorptive stripping voltammetry (AdSV), with differential pulse steps, was performed at a mercury film electrode and has been applied here for the determination of trace molybdenum content in selected wild mushrooms. Fruiting body caps of 12 selected macrofungi species from Basidiomycetes have been investigated. Molybdenum content of investigated samples was determined in the range of 0.006 to 0.38 mg kg−1 of dry matter. The highest value of molybdenum content was found in Leccinum rufum and the lowest in Lactarius deliciosus.
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