نتایج جستجو برای: solidification of a floating organic drop
تعداد نتایج: 23299484 فیلتر نتایج به سال:
روش میکرواستخراج قطره آلـی منجمد شنـاور شده (solidified floating organic drop microextraction) همراه با اسپکتروفتومتری بـرای جـداسازی/ تغلیظ و انـدازه گـیری مقادیر ناچیز وانـادیـم در نمونه هـای آب طراحی شده است. از 8- هیدروکسی کینولین ( اکسین ) به عنوان عامل کـی لیت دهنده استفاده شده است. در این مطالـعه پـارامترهـای موثر بر سیستم استـخـراج مانند ph، ماهیت حلال آلی، غلظت اکسین، حجم فاز آلی، زمان...
A simple microextraction method based on solidification of a floating organic drop (SFOD) was developed for preconcentration of lead prior to its determination by electrothermal atomic absorption spectrometry (ETAAS). Ammonium pyrolidinedithiocarbamate (APDC) was used as complexing agent, and the formed complex was extracted into a 20 μL of 1-undecanol. The extracted complex was diluted with et...
chapter one is devoted to a moderate discussion on preliminaries, according to our requirements. chapter two which is based on our work in (24) is devoted introducting weighted semigroups (s, w), and studying some famous function spaces on them, especially the relations between go (s, w) and other function speces are invesigated. in fact this chapter is a complement to (32). one of the main fea...
in the first part of this thesis we explored wetting and its dynamics for small droplets. first, we showed how a simple feature of water droplets on a surface, i.e. laplace pressure, can be exploited to build a micropump. we investigated capillary pumping in microchannels both experimentally and numerically. putting two droplets of different sizes at the in/outlet of a microchannel, will ge...
An efficient, rapid, simple, and highly selective dispersive liquid–liquid microextraction based on solidification of floating organic drop (DLLME-SFOD), combined with flame atomic absorption spectrometry was developed for preconcentration and determination of trace amounts of cobalt in water samples. In this method, an appropriate mixture of acetone and 1-undecanol was injected rapidly into th...
the present study has tried to accomplish an analysis of margaret atwood’s novels oryx and crake, and the year of the flood in the light of posthuman and cyborg theories. considering posthumanism as a critical reading of some notions of humanism focus of which in this thesis has been identity, new definitions for humanity and human identity are formed. haraway’s cyborg, as one possible new figu...
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