کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7608807 | 1493389 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microwave-assisted decomplexation and in-situ headspace in-syringe dynamic derivatization of dimethylamine borane with high performance liquid chromatography-fluorescence detection
ترجمه فارسی عنوان
تجزیه و تحلیل مایکروویو-کمک و مایکروویو در محل سرپوش در مشتقات پویا دی متیل آمین بورن با تشخیص کروماتوگرافی مایع عملکرد بالا-فلورسانس
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
A rapid, sensitive, selective, and simple method for monitoring dimethylamine borane (DMAB) in aqueous sample is proposed by combining microwave-assisted de-complexation, headspace liquid phase in-situ derivatization extraction, and high-performance liquid chromatography-fluorescence detection for the determination of DMAB in samples. The present procedure involves de-complexation of DMAB using microwave irradiation, evolution of dimethylamine (DMA) to the headspace from an alkalized sample solution, and dynamic headspace liquid-phase derivatization extraction (Dy-HS-LPDE) of DMA with 9-fluorenylmethyl chloroformate in a syringe barrel. In addition to the optimal Dy-HS-LPDE and chromatographic parameters described in our previous study, the de-complexation of DMAB by thermal and microwave-assisted procedures and evolution of DMA into the headspace from an alkalized solution and modification of the Dy-HS-LPDE method are thoroughly investigated. The results indicate that complete de-complexation was obtained at 70â¯Â°C for 5â¯min, 30â¯Â°C for 10â¯min, or using microwave irradiation for 30â¯s at any applied power. It indicates that the DMAB complex easily undergoes de-complexation under microwave irradiation. The linearity range was 0.01-0.5â¯mgâ¯Lâ1 for DMAB and 0.0077-0.38â¯mgâ¯Lâ1 for DMA, with a coefficient of determination of 0.9995, and limit of detection of 3â¯Î¼gâ¯Lâ1 (limit of quantitation of 10â¯Î¼gâ¯Lâ1) for DMAB. The recoveries of DMAB are 95.3% (3.0% RSD) for waste water when spiked 0.05â¯mgâ¯Lâ1 and 93.5% (5.4% RSD) for the samples spiked with copper and nickel salts (5â¯mM each in the spiked waste sample). The whole analytical procedure can be completed within 25â¯min. The results confirm that the present method is a rapid, sensitive, selective, automated, low-cost and eco-friendly procedure to identify DMAB in samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1537, 16 February 2018, Pages 21-26
Journal: Journal of Chromatography A - Volume 1537, 16 February 2018, Pages 21-26
نویسندگان
Sarangapani Muniraj, Hua-Kwang Lee, Chunming Hsiech, Jen-Fon Jen,