کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7553789 | 1490814 | 2018 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ultrasound assisted enzymatic hydrolysis for isolating titanium dioxide nanoparticles from bivalve mollusk before sp-ICP-MS
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Ultrasound assisted enzymatic hydrolysis for isolating titanium dioxide nanoparticles from bivalve mollusk before sp-ICP-MS Ultrasound assisted enzymatic hydrolysis for isolating titanium dioxide nanoparticles from bivalve mollusk before sp-ICP-MS](/preview/png/7553789.png)
چکیده انگلیسی
Applicability of single-particle inductively coupled plasma mass spectrometry (sp-ICP-MS) using dwell times equal to or shorter than 100â¯Î¼s has been tested for assessing titanium dioxide nanoparticles (TiO2 NPs) in bivalve mollusks. TiO2 NPs isolation from fresh mollusk tissues was achieved by ultrasound assisted enzymatic hydrolysis procedure using a pancreatin/lipase mixture. Optimum extraction conditions imply ultrasonication (60% amplitude) for 10â¯min, and 7.5â¯mL of a solution containing 3.0â¯g Lâ1of pancreatin and lipase (pH 7.4). The developed method was found to be repeatable (repeatability of 17% for the over-all procedure, TiO2 NPs concentration of 5.33â¯Ãâ¯107â¯Â±â¯8.89â¯Ãâ¯106, nâ¯=â¯11), showing a limit of detection of 5.28â¯Ãâ¯106 NPs gâ1, and a limit of detection in size of 24.4-30.4â¯nm, based on the 3Ï criteria, and on the 3Ï/5 Ï criteria, respectively. The analytical recovery within the 90-99% range (use of TiO2 NPs standards of 50â¯nmâ¯at 7 and 14â¯Î¼gâ¯Lâ1 as Ti). Several bivalve mollusks (clams, cockles, mussels, razor clams, oysters and variegated scallops) were analyzed for total titanium (ICP-MS after microwave assisted acid digestion), and for TiO2 NPs by the proposed method. TiO2 NPs concentrations were within the 2.36â¯Ãâ¯107-1.25â¯Ãâ¯108 NPs gâ1 range, and the most frequent sizes were from 50 to 70â¯nm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 1018, 14 August 2018, Pages 16-25
Journal: Analytica Chimica Acta - Volume 1018, 14 August 2018, Pages 16-25
نویسندگان
MarÃa Vanesa Taboada-López, Sara Iglesias-López, Paloma Herbello-Hermelo, Pilar Bermejo-Barrera, Antonio Moreda-Piñeiro,