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مقاله Application of modified nanoclay as a sorbent for separation and preconcentration trace amounts of Tl+ ions دارای 13 صفحه می باشد و دارای تنظیمات در microsoft word می باشد و آماده پرینت یا چاپ است

فایل ورد مقاله Application of modified nanoclay as a sorbent for separation and preconcentration trace amounts of Tl+ ions کاملا فرمت بندی و تنظیم شده در استاندارد دانشگاه و مراکز دولتی می باشد.

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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 Application of modified nanoclay as a sorbent for separation and preconcentration trace amounts of Tl+ ions،به هیچ وجه بهم ریختگی وجود ندارد

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بخشی از متن مقاله Application of modified nanoclay as a sorbent for separation and preconcentration trace amounts of Tl+ ions :

سال انتشار: 1388

محل انتشار: همایش ملی نانو مواد و نانو تکنولوژی

تعداد صفحات: 13

چکیده:

A procedure has been proposed for separation and preconcentration of trace amounts of thallium. It is based on the adsorption of thallium (I) ions onto organo nanoclay loaded with 1-(2-pyridylazo)-2-naphthol (PAN). Thallium (I) ions were quantitatively retained on the column in the pH range of 3.5-6.0, whereas quantitative desorption occurs with 5.0 mL of 5% ascorbic acid and thallium was determined by flame atomic absorption spectrometry. Linearity was maintained between 0.66 ng mL-1-15.0 g mL-1 in initial solution. Detection limit was 0.2 ng mL-1 in initial solution and preconcentration factor was 150. Eight replicate determinations of 2.0 g mL-1 of thallium in final solution gave a relative standard deviation of ±148%. Various parameters such as the effect of pH, breakthrough volume and interference of a large number of anions and cations have been studied and the proposed method was used to determine thallium (I) ions in water and standard samples. Determination of thallium ions in standard sample showed that the proposed method have good accuracy.

 

 

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