Author/Authors :
كريمي ، محمدعلي نويسنده , , هاتفي مهرجردي، عبدالحميد نويسنده - , , محدثي، عليرضا نويسنده Department of Chemistry, Payame Noor University, P.O. Box 19395-4697, Tehran, I.R. Iran Mohadesi, Alireza , مير محمدي، سيد ضيا الدين نويسنده دانشجوي دکتري تاريخ و تمدن دانشگاه معارف اسلامي MirMuhammadi, Sayyid Ziya’-u al-Din , تقديري، مهدي نويسنده , , يار احمدي، جواد نويسنده Department of Chemistry, Faculty of Sciences, Payame Noor University, PO Box 19395-3697, Tehran, Iran Yarahmadi, Javad , محموديان، حوا نويسنده Department of Chemistry, Faculty of Sciences, Payame Noor University, PO Box 19395-3697, Tehran, Iran Mahmoodian, Havva , نژاد خراساني، شهلا نويسنده Department of Chemistry, Faculty of Sciences, Payame Noor University, PO Box 19395-3697, Tehran, Iran Nezhad Khorasani, Shahla
Abstract :
در اين كار تحقيقي، يك روش جديد، ساده و سريع استخراج فاز جامد-اندازه گيري طيف نورسنجي فسفات با استفاده از ستيل تري متيل آمونيوم برميد نشانده بر روي نانوذرات مغناطيسي پوشيده با آلومينا (CTAB@ACMNPs) توسعه داده شده است. اندازه گيري فسفات بر اساس روش موليبدن آبي در ?max معادل 810 نانومتر صورت پذيرفت. MNPs و ACMNPs به وسيله SEM، VSM و طيف نوربيني XRD توصيف شدند. اين روش به طور موفقيت آميزي براي جداسازي/پيش تغليظ و اندازه گيري فسفات در نمونه هاي آب مختلف بكار رفت و بازيابي هاي مناسبي به دست آمد.
Abstract :
In this work, a new, simple and fast method for the solid phase extraction-spectrophotometric determination of phosphate using cetyltrimethyl ammonium bromide immobilized on alumina-coated magnetite nanoparticles (CTAB@ACMNPs) has been developed. The determination of phosphate is based on the molybdenum blue method which was monitored at ?max of 810 nm. MNPs and ACMNPs characterized by SEM, VSM, and XRD spectroscopy. This method avoided the time-consuming column-passing process of loading large volume samples in traditional SPE through the rapid isolation of CTAB@ACMNPs with an adscititious magnet. Under the optimal experimental conditions, the preconcentration factor (PF), detection limit (DL), linear range (LR) and relative standard deviation (RSD) of phosphate were 80 (for 400 mL of sample solution), 0.038 µg mL?1, 0.8-10.0 µg mL?1 and 2.5 % (for 5.0 µg mL-1, n=7), respectively. The proposed method was successfully applied to the separation/preconcentration and determination of phosphate in different water samples and suitable recoveries were obtained.
