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Design of an Optical Sensor for Aluminium(III) Determination Based on Immobilization of Eriochrome Cyanine R on a Triacetylcellulose | ||
| Iranian Journal of Analytical Chemistry | ||
| مقاله 8، دوره 3، شماره 2، آذر 2016، صفحه 145-152 اصل مقاله (1021.09 K) | ||
| نوع مقاله: Full research article | ||
| نویسندگان | ||
| Habibollah Khajehsharifi* ؛ Aida Solhjoo؛ Mohammad Mahdi Bordbar | ||
| Department of Chemistry, College of Sciences, Yasouj University, P. O. Box 7591-874934, Yasouj, Iran | ||
| چکیده | ||
| A selective optical sensor based on immobilization of Eriochrome Cyanine R for the determination of Al(III) ions in aqueous solution has been developed. The method is based on the spectrophotometric measurement of complex Eriochrome Cyanine R-aluminium at 537 nm. The sensing membrane is made of a triacetylcellulose film containing Eriochrome Cyanine R colorimetric reagent immobilized as an ion pair with methyltrioctylammonium chloride. The response of the sensor is based on the Eriochrome Cyanine R absorbance decrease by the coordination of Al(III) ions. At pH= 6.0, the linear dynamic rangeis varied from 3.22×10-8 to 4.10×10-5 mol L-1 with a detection limit of 1.2× 10-8 mol L-1. A dynamic working range, detection limit, sensitivity, selectivity and the response time were discussed in detail. The response was pH dependent. The membrane responds to Al(III) ions irreversibly by changing color from pink to blue. The membrane was regenerated in less than 30 seconds with 0.1 mol L-1 EDTA solution and was ready for further measurements. The response time of the sensor was within 16 min depending on the concentration of Al (III) ions. The sensor response was found to have a repeatability and reproducibility of 1.62% and 3%, respectively. The sensor provides appropriate selectivity to Al(III) ions over transition metal cations, including Co(II), Ni(II), Fe(III), Cu(II) and Zn(II). The sensor has been used for the determination of Al(III) ions in potable water and aluminium – magnesium syrup. | ||
| کلیدواژه‌ها | ||
| Optical sensor؛ Triacetylcellulose Membrane؛ Eriochrome Cyanine R؛ Aluminium؛ Lipophilic Ion Pairs | ||
| عنوان مقاله [English] | ||
| طراحی یک حسگر نوری برای انداره گیری آلومینیوم(III) بر اساس نشانش اریو کرم سیانین R بر روی تری استیل سلولز | ||
| نویسندگان [English] | ||
| حبیب الله خواجه شریفی؛ آیدا صلح جو؛ محمد مهدی بردبار | ||
| بخش شیمی، دانشکده علوم، دانشگاه یاسوج، یاسوج، ایران | ||
| چکیده [English] | ||
| یک حسگر نوری بر پایه نشاندن واکنشگر اریوکروم سیانین‌آر به روی غشاء تری استیل سلولز برای اندازهگیری یون آلومینیوم (III) طراحی شد. این حسگر نوری دارای پاسخ برگشت‌پذیر و تکرار‌پذیر میباشد. در اثر بر همکنش انتخابی اریوکروم سیانین‌آر موجود در غشاء با یون آلومینیوم، رنگ غشاء از صورتی به بنفش در0/6pH= تغییر می‌کند. درشرایط بهینه، روش دارای پاسخ خطی غلظت یون آلومینیوم (III) از 8-10×22/3 تا 5-10×10/4 مولار و حد تشخیص آن 8-10×2/1 مولار میباشد. جزئیات محاسبه خطی، حد تشخیص، حساسیت، گزینشپذیری و زمان پاسخ مورد بحث قرار گرفت. پاسخ حسگر وابسته بهpH بود. پاسخ غشاء به یون آلومینیوم (III) غیر برگشتی و شامل تغییر رنگ از صورتی به آبی بود. غشاء از طریق گذاشتن در محلول 1/0 مولار EDTA در کمتر از 30 ثانیه قابل برگشت برای اندازهگیریهای بیشتر میباشد. زمان پاسخ غشاء کمتر از 16 دقیقه بر حسب غلظت آلومینیوم میباشد. تکرارپذیری و تکثیرپذیری پاسخ غشاء به ترتیب 62/1 و 3 درصد بدست آمد. حسگر پاسخ گزینشپذیری را نسبت به آلومینیوم (III) در مقابل کاتیونهای دیگر نظیر Zn(II)، Cu(II)، Fe(III)، Ni(II) و Co(II) از خود نشان میدهد. حسگر برای اندازهگیری آلومینیوم (III) در آبهای شرب و شربت منیزیم-آلومینیوم استفاده شده است. | ||
| کلیدواژه‌ها [English] | ||
| حسگر نوری, تری استیل سلولز, اریو کرم سیانین آر, آلومینیوم, جفت یون لیپوفیلیک | ||
| مراجع | ||
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