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Danuta Barałkiewicz Hanka Gramowska Krzysztof Ren Mirosław Mleczek 《Central European Journal of Chemistry》2006,4(2):363-374
A direct and sensitive method for the determination of vanadium concentrations in soil is developed using ultrasonic slurry
sampling electrothermal atomic absorption spectrometry (USSSETAAS). The surfactant, KO300G, is used as the stabilizing agent.
The precision and accuracy of the method are investigated. The detection limits are 0.6 and 0.7 μg 1−1 for SRM Montana Soil 2711 and SRM Soil — S, respectively. The method is applied to determine the vanadium content in 10 soil
samples from the Wielkopolska region. 相似文献
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Sylwia Budzyska Marek Siwulski Monika Gsecka Zuzanna Magdziak Pavel Kala
Przemysaw Niedzielski Mirosaw Mleczek 《Molecules (Basel, Switzerland)》2022,27(7)
Mushrooms fortified with iron (Fe) can offer a promising alternative to counter the worldwide deficiency problem. However, the factors that may influence the efficiency of fortification have not yet been fully investigated. The aim of this study was to compare the effects of three Fe forms (FeCl3 6H2O, FeSO4 7H2O, or FeHBED) in three concentrations (5, 10, or 50 mM) for three mushroom species (Pleurotus eryngii, P. ostreatus, or Pholiota nameko) on their chemical composition, phenolic compounds, and organic acid production. The most effective metal accumulation of all the investigated species was for the 50 mM addition. FeCl3 6H2O was the most favorable additive for P. eryngii and P. nameko (up to 145 and 185% Fe more than in the control, respectively) and FeHBED for P. ostreatus (up to 108% Fe more than in control). Additionally, P. nameko showed the highest Fe accumulation among studied species (89.2 ± 7.51 mg kg−1 DW). The creation of phenolic acids was generally inhibited by Fe salt supplementation. However, an increasing effect on phenolic acid concentration was observed for P. ostreatus cultivated at 5 mM FeCl3 6H2O and for P. eryngii cultivated at 5 mM FeCl3 6H2O and 5 mM FeSO4 7H2O. In the case of organic acids, a similar situation was observed. For P. ostreatus, FeSO4 7H2O and FeHBED salts increased the formation of the determined organic acids in fruiting bodies. P. eryngii and P. nameko were characterized by a much lower content of organic acids in the systems supplemented with Fe. Based on the obtained results, we recommend starting fortification by preliminarily indicating which form of the element is preferred for the species of interest for supplementation. It also seems that using an additive concentration of 50 mM or higher is most effective. 相似文献
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Baralkiewicz Danuta El-Sayed Usama Filipiak Marian Gramowska Hanka Mleczek Miroslaw 《Central European Journal of Chemistry》2004,2(2):334-346
Slurry sampling electrothermal atomic absorption (SS ETAAS) was applied to the development of a sensitive and precise method
for selenium determination in infant foods without sample pretreatment. Suspensions prepared in a medium containing 0.1% Triton
X-100, 0.5 or 5% v/v concentrated HNO3 were directly introduced into the furnace. The accuracy of the procedure was confirmed by analysis of a standard reference
material and comparison with hydride generation atomic absorption spectrometric (HGAAS) procedure. The characteristic mass
is 44 pg and detection limit 0.43 μg·l−1. 相似文献
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