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Nano-SiO2 Modified by CTAB and Oxime Ligand for Separation and Preconcentration of Trace Amount of Cu(II) in Real Environmental Samples | ||
| Iranian Journal of Analytical Chemistry | ||
| مقاله 17، دوره 4، شماره 1، خرداد 2017، صفحه 59-66 اصل مقاله (872.4 K) | ||
| نوع مقاله: Full research article | ||
| نویسندگان | ||
| Narges Vaezi1؛ Nasser Dalali1؛ Mehdi Hosseini* 2 | ||
| 1FIA-Lab., Department of Chemistry, Faculty of Sciences, University of Zanjan, Zanjan, Iran | ||
| 2FIA-Lab., Department of Chemistry, Faculty of Sciences, University of Zanjan, Zanjan, Iran; University of Applied-Science, Branch of Calcimin, Dandi, Zanjan, Iran | ||
| چکیده | ||
| A simple, novel, accurate and selective method for the determination of trace amounts of Cu2+ ions in water and soil samples is proposed. The method is based on the separation and preconcentration of Cu2+ on a nano-SiO2 modified by a cetyltrimethylammonium bromide as surfactant and indane-1,2,3-trione-1,2-dioxime as complexing agent. The retained copper on the nano-sorbent was eluted with 1.5 mL of 1.0 mol L-1 HNO3 and measured by flame atomic absorption spectrometry. The synthesis of this nano-sorbent is also described and certified by FTIR, XRD and TEM techniques. Furthermore, several effective analytical parameters were evaluated and optimized. Under the best optimum conditions maximum absorption capacity, enrichment factor and limit of detection were 7.04 mg g-1, 333.3 and 4.4 µg L-1, respectively. The relative standard deviation of the preconcentration method was 0.28% (n=7) and calibration curve gave good level of linearity with correlation coefficient value 0.997. Finally, the feasibility and performance of the method was evaluated by determination of copper (II) ions in several water and soil samples with satisfied results. | ||
| کلیدواژه‌ها | ||
| Nano-SiO2 Modified؛ Cetyltrimethylammonium Bromide Surfactant؛ Indane Ligand؛ separation؛ Preconcentration؛ Copper Determination | ||
| عنوان مقاله [English] | ||
| نانو سیلیکای اصلاحشده توسط CTAB و لیگاند اکسیم جهت جداسازی و پیشتغلیظ مقادیر ناچیز یون مس (II) در نمونههای زیست-محیطی حقیقی | ||
| نویسندگان [English] | ||
| نرگس واعظی1؛ ناصر دلالی1؛ مهدی حسینی2 | ||
| 1آزمایشگاه جداسازی فازها و تزریق جریان، گروه شیمی، دانشکده علوم، دانشگاه زنجان، زنجان، ایران | ||
| 2آزمایشگاه جداسازی فازها و تزریق جریان، گروه شیمی، دانشکده علوم، دانشگاه زنجان، زنجان، ایرانِ؛ دانشگاه علمی کاربردی، مرکز کالسیمین، زنجان، ایران | ||
| چکیده [English] | ||
| یک روش ساده، جدید، صحیح و گزینشپذیر برای اندازه‌گیری مقادیر ناچیز یون مس در نمونههای آبی و خاک پیشنهاد شده است. روش بر اساس جداسازی و پیشتغلیظ یون مس بر روی نانوسیلیکای اصلاحشده توسط ستیل تری متیل آمونویم برومید به عنوان عامل فعالکننده سطح و ایندان-1و2و3-تری اون 1و2-دی اکسیم به عنوان عامل کمپلکسدهنده میباشد. مس جذبشده بر روی نانوجاذب با استفاده از 1.5 میلی لیتر از محلول 0.1 مولار نیتریک اسید شسته شده و سپس بوسیله دستگاه جذب اتمی شعلهای تعیین مقدار میشود. فرآیند سنتز این نانوجاذب تشریح شده و با استفاده از تکنیکهای طیف بینی زیر قرمز تبدیل فوریه FTIR، پراش اشعه ایکس XRD و تصویربردای میکروسکوپی روبشی گرمایی TEM تایید شده است. علاوه بر این، چندین پارامتر تجزیه‌ایی تاثیر گذار بر فرآیند بررسی و بهینه شده‌اند. تحت بهترین شرایط بهینه حاصله، بیشترین ظرفیت جذب، فاکتور غنیسازی و حد تشخیص روش به ترتیب 04/7 میلی گرم بر گرم، 3/333 و 4/4 میکروگرم بر لیتر بدست آمدند. انحراف استاندارد نسبی روش پیش تغلیظ (RSD) برای 7 تکرار 0.28% حاصل شد و منحنی درجه‌بندی محدوده خطی خوبی با مقدار ضریب رگرسیون 997/0 حاصل شد. در پایان، انعطافپذیری و کارآیی روش با استفاده از اندازه‌گیری یون مس (II) در چندین نمونه آب و خاک ارزیابی شده و نتایج رضایتبخشی بدست آمد. | ||
| کلیدواژه‌ها [English] | ||
| نانوسیلیکای اصلاحشده, عامل فعالکننده سطحی ستیل تری متیل آمونیوم برومید, لیگاند ایندان, جداسازی, پیش تغلیظ, تعیین مقدار مس | ||
| مراجع | ||
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