مقاله Dispersive liquidدرliquid microextraction assisted bymodified Lanthanum nanoparticles for quantitative analysisof ofloxac
مقاله Dispersive liquidدرliquid microextraction assisted bymodified Lanthanum nanoparticles for quantitative analysisof ofloxacin با word دارای 5 صفحه می باشد و دارای تنظیمات در microsoft word می باشد و آماده پرینت یا چاپ است
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توجه : در صورت مشاهده بهم ریختگی احتمالی در متون زیر ،دلیل ان کپی کردن این مطالب از داخل فایل ورد می باشد و در فایل اصلی مقاله Dispersive liquidدرliquid microextraction assisted bymodified Lanthanum nanoparticles for quantitative analysisof ofloxacin با word،به هیچ وجه بهم ریختگی وجود ندارد
بخشی از متن مقاله Dispersive liquidدرliquid microextraction assisted bymodified Lanthanum nanoparticles for quantitative analysisof ofloxacin با word :
سال انتشار: 1393
محل انتشار: اولین کنفرانس ملی نانو فناوری در صنایع نفت، گاز و پتروشیمی
تعداد صفحات: 5
چکیده:
A practical and simple modified Lanthanum nanoparticle-disepersive liquidliquidmicroextraction (MLaNps-DLLME) has been successfully applied aselectrostatic affinity probes to the microextraction and preconcentration ofofloxacin prior to spectrofluorimetry analysis. This technique is based on aternary system of solvents, where appropriate amount of microextractioncontaining tetraalkylammonium bromide coated Lanthanum nanoparticles(LaNps), and disperser solvents are directly injected into an aqueoussolution containing ofloxacin. A cloudy mixture is formed, and ofloxacin inthe aqueous matrix is extracted into the fine droplets of microextractionsolvent containing LaNps. The settled phase is collected and transferredinto a micro-cell of fluorimeter for the determination of ofloxacin atexcitation/emission wavelengths of 335/375 nm. The obtained resultsdemonstrated that electrostatic attraction forces caused by LaNps weremuch stronger than the hydrophobic attraction forces. Various factorsinfluencing microextraction efficiency were studied and optimized. Underthe optimum conditions, the method provided a relatively broad lineardynamic range of 0.1 to 150 ng mL1, a detection limit of 0.02 ng mL1 anda relative standard deviation of 2.1%. Finally, the method was successfullyapplied to ofloxacin determination in actual pharmaceutical formulationsand human urine sample.
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