کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6331136 | 1619792 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Separation and measurement of silver nanoparticles and silver ions using magnetic particles
ترجمه فارسی عنوان
جداسازی و اندازه گیری نانوذرات نقره و یون نقره با استفاده از ذرات مغناطیسی
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کلمات کلیدی
نانوذرات نقره، ذرات جذب مغناطیسی، روش جداسازی، نظارت بر محیط زیست،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
The recent surge in consumer products and applications using metallic nanoparticles has increased the possibility of human or ecosystem exposure due to unintentional release into the environment. To protect consumer health and the environment, there is an urgent need to develop tools that can characterize and quantify these materials at low concentrations and in complex matrices. In this study, magnetic nanoparticles coated with either dopamine or glutathione were used to develop a new, simple and reliable method for the separation/pre-concentration of trace amounts of silver nanoparticles followed by their quantification using inductively coupled plasma mass spectrometry (ICP-MS). The structurally modified magnetic particles were able to capture trace amounts of silver nanoparticles (~Â 2Â ppb) and concentrate (up to 250 times) the particles for analysis with ICP-MS. Under laboratory conditions, recovery of silver nanoparticles was >Â 99%. More importantly, the magnetic particles selectively captured silver nanoparticles in a mixture containing both nano-particulate and ionic silver. This unique feature addresses the challenges of separation and quantification of silver nanoparticles in addition to the total silver in environmental samples. Spiking experiments showed recoveries higher than 97% for tap water and both fresh and saline surface water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 472, 15 February 2014, Pages 316-323
Journal: Science of The Total Environment - Volume 472, 15 February 2014, Pages 316-323
نویسندگان
Samuel K. Mwilu, Emily Siska, R.B. Nasir Baig, Rajender S. Varma, Ed Heithmar, Kim R. Rogers,