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Trace Determination of Tetranitrocarbazole in Aquatic Environment Using Carbon Dot-Dispersive Liquid-Liquid Microextraction Followed by UV-Vis Spectrophotometry | ||
Iranian Journal of Analytical Chemistry | ||
مقاله 3، دوره 5، شماره 1، خرداد 2018، صفحه 17-24 اصل مقاله (946.72 K) | ||
نوع مقاله: Full research article | ||
نویسندگان | ||
Hadi Farahani* 1؛ Mehdi Rahimi-Nasrabadi2 | ||
1Research Institute of Petroleum Industry (RIPI), P. O. Box 1485733111, Tehran, Iran | ||
2Department of Chemistry, Imam Hossein University, P.O. Box 16575-347, Tehran, Iran | ||
چکیده | ||
An efficient carbon dot-dispersive liquid-liquid microextraction followed by UV-Vis spectrophotometry (CD-DLLME-UV-Vis) has been effectively developed for the sensitive determination of 1,3,6,8-tetranitrocarbazole (TNC) in environmental water samples. In this DLLME-based method, home-made syntheses carbon dots (CDs) were directly extracted into carbon tetrachloride using trioctylmethylammonium chloride (aliquat 336), which works as a disperser agent. By applying inherent colorimetric feature, the enriched CDs exhibited an intensive absorption signal at 300 nm, which swelled up in the presence of TNC due to their interaction at the colloidal interface. Main parameters that controlling and affecting the performance of the microextraction process were evaluated and optimized in details. An enrichment factor of 55.5 beside a meaningful sample clean-up was achieved under the optimized conditions. The calibration curve was linear in the range of 1-200 ng mL-1 with regression coefficient corresponding to 0.999. Limit of detection (S/N = 3) was 0.2 ng mL-1 while the RSD% values (n = 10) for the target analyte at two concentration levels of 20 and 100 ng mL-1 were 3.6 and 1.7, respectively. The proposed method was ultimately exerted for the preconcentration and determination of TNC in various environmental water samples and admissible results were achieved. | ||
کلیدواژهها | ||
Carbon Dot-Dispersive Liquid-Liquid Microextraction؛ Environmental Water Samples؛ Tetranitrocarbazole؛ UV-Vis Spectrophotometry | ||
عنوان مقاله [English] | ||
اندازهگیری مقادیر جزئی تترانیتروکاربازول در آبهای زیستمحیطی با استفاده از روش کربندات - ریزاستخراج مایع - مایع پخشی و اسپکتروسکوپی ماوراءبنفش – مرئی | ||
نویسندگان [English] | ||
هادی فراهانی1؛ مهدی رحیمی نصرآبادی2 | ||
1پژوهشگاه صنعت نفت، صندوق پستی 1485733111، تهران، ایران | ||
2بخش شیمی، دانشگاه امام حسین (ع)، صندوق پستی 347-16575، تهران، ایران | ||
چکیده [English] | ||
یک روش ریزاستخراج مایع – مایع پخشی بر پایه استفاده از خاصیت ذاتی رنگ سنجی کربنداتها جفت شده با اسپکتروفتومتری فرابنفش - مرئی برای اندازهگیری مقادیر جزئی تترانیتروکاربازول در نمونههای آب زیستمحیطی به صورت موفقیتآمیزی توسعه یافت. در این تکنیک بر پایه ریزاستخراج مایع – مایع پخشی، کربن داتهای سنتز شده با کمک متیلتریاکتیل آمونیوم کلرید (آلیکوات 336s) به درون حلال کربن تتراکلرید که نقش حلال پخش کننده را ایفا می کرد، استخراج شدند. با بکارگیری خاصیت ذاتی کربنداتهای غنی شده، جذبی در ناحیه 300 نانومتر بدست آمد که در حضور تترانیتروکاربازول و به واسطه برهمکنش در سطح کلوئیدی نانوذرات سنتز شده شدت جذب افزایش معنیداری یافت. ابتدا پارامترهای اصلی کنترلکننده کارآیی ریزاستخراج مورد بررسی و ارزیابی قرار گرفتند. در شرایط بهینه فاکتور تغلیظ 5/55 به همراه کاهش اثر مزاحمتها حاصل شد. گستره خطی منحنی کالیبراسیون در محدوده خطی 200-1 نانوگرم بر میلیلیتر به همراه ثابت همبستگی 999/0 برای آنالیت هدف بدست آمد. حد تشخیص 2/0 نانوگرم بر میلیلیتر و دقت در غلظتهای 20 و 100 نانوگرم بر میلی لیتر (با 10 بار تکرار) به ترتیب برابر با 6/3 و 7/1 حاصل شد. در پایان کارآیی روش با آنالیز تترانیتروکاربازول در نمونههای مختلف آب زیستمحیطی مورد بررسی قرار گرفت و نتایج قابل قبولی بدست آمد. | ||
کلیدواژهها [English] | ||
ریزاستخراج مایع - مایع پخشی بر پایه کربن دات, آبهای زیست محیطی, تترانیتروکاربازول, اسپکتروفوتومتری ماوراء بنفش – مرئی | ||
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