نتایج جستجو برای: flame atomic absorption spectroscopy
تعداد نتایج: 372101 فیلتر نتایج به سال:
Ground fish scales were characterized as a solid phase extraction medium for preconcentration of parts per billion levels of transition elements prior to their flame atomic absorption spectroscopic (FAAS) determination. At the indicated optimum pH, sorption follows the order Cd (pH 7.0) ≥ Pb (pH 5.5)> Fe (pH 4.8) > Cu > Zn (pH 6.0) > Ni (pH 7.5) > Mn (pH 8.5) > Cr (pH 4.8). At pH 5.5, following...
Human hair shavings were characterized as a sorbent for trace metals. At pH 7.0 metal sorption follows the order Pb(II)>Cd(II)>Cr(VI)>Fe(III)>Cu(II)>Ni(II)>Mn(VI). Metal recovery is quantitative for Pb and Cd after 30 min of equilibration. Recovery of other metals is less quantitative and varies with pH. For example, while Cu is best recovered at pH 5, Ni and Mn are sorbed optimally in the basi...
The aim of this study was to identify and compare the mineral micronutrients compositions, color and genetic structure differences between the wild and farmed Caspian Sea Beluga (Huso huso) sturgeon caviar, which plays an important role to caviar market transparency to prove farmed caviar quality and nutritional values and wild and farmed Beluga caviar genetic identification. Mineral micronutri...
Tomographic analysis is used to provide a correction to low-pressure stoichiometric premixed CH(4)/O(2) flame temperatures measured with tunable diode laser absorption spectroscopy employing CO two-line thermometry. It is shown that flame temperatures measured with line-of-sight-based two-line thermometry are always too low and that the correction to the observed temperature is a nonlinear func...
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