منابع مشابه
Indirect Determination of Ascorbic Acid by Atomic Absorption Spectroscopy
A new and simple method followed by atomic absorption spectrometry has been developedfor indirect determination of ascorbic acid (AA). The proposed method was based on the oxidationof AA to dehydroascorbic acid with Cu2+cation(200mgL-1)in an ammonium thiocyanatesolution atpH2.4. AA reduces Cu2+to Cu+followed by the precipitation of Cu+ with SCN-. Then, the excess ofCu2+in the solution was measu...
متن کاملindirect determination of ascorbic acid by atomic absorption spectroscopy
a new and simple method followed by atomic absorption spectrometry has been developedfor indirect determination of ascorbic acid (aa). the proposed method was based on the oxidationof aa to dehydroascorbic acid with cu2+cation(200mgl-1)in an ammonium thiocyanatesolution atph2.4. aa reduces cu2+to cu+followed by the precipitation of cu+ with scn-. then, the excess ofcu2+in the solution was measu...
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Inorganic lead compounds are used most widely in paint and pigment industries. Because of exposure to lead dust in workers in a copying center, we compared blood lead levels in these workers to normal individuals and investigated the relationship between job tenures of the workers and their blood lead levels. This survey was performed on 20 simple workers in a copying center of Tehran Univ...
متن کاملSingle-particle absorption spectroscopy by photothermal contrast.
Removing effects of sample heterogeneity through single-molecule and single-particle techniques has advanced many fields. While background free luminescence and scattering spectroscopy is widely used, recording the absorption spectrum only is rather difficult. Here we present an approach capable of recording pure absorption spectra of individual nanostructures. We demonstrate the implementation...
متن کاملMassive-scalar Absorption by Extremal p-branes
We study the absorption probability of minimally-coupled massive scalars by extremal p-branes. In particular, we find that the massive scalar wave equation under the self-dual string background has the same form as the massless scalar wave equation under the dyonic string background. Thus it can be cast into the form of a modified Mathieu equation and solved exactly. Another example that we can...
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ژورنال
عنوان ژورنال: Acta Crystallographica
سال: 1963
ISSN: 0365-110X
DOI: 10.1107/s0365110x63003364