کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7612340 1493556 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ion exchange membranes as novel passive sampling material for organic ions: Application for the determination of freely dissolved concentrations
ترجمه فارسی عنوان
غشای تبادل یونی به عنوان مواد جدید نمونه برداری غیر فعال برای یون های آلی: کاربرد برای تعیین غلظت آزاد شده آزاد
کلمات کلیدی
مواد شیمیایی آلی یونیک، غلظت آزاد، دیالیز تعادل، پلیمر تبادل یون آلبومین سرم،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Many studies in pharmacology, toxicology and environmental science require a method for determining the freely dissolved concentration of a target substance. A recently developed tool for this purpose is equilibrium passive sampling with polymeric materials. However, this method has rarely been applied to ionic organic substances, primarily due to limited availability of convenient sorption materials. This study introduces ion exchange membranes (IEMs) as a novel passive sampling material for organic ions. The partitioning of 4-ethylbenzene-1-sulfonate, 2,4-dichlorophenoxyacetic acid and pentachlorophenol to one anion exchange membrane (FAS) and of difenzoquat, nicotine and verapamil to one cation exchange membrane (FKS) was investigated. All test substances exhibited a sufficiently high affinity for the respective IEM with logarithmic IEM-water partition coefficients >2.3. Sorption equilibrium was established quickly, within several hours for the FAS membrane and within 1-3 days for the FKS membrane. For permanently charged substances the partitioning to the IEMs was independent of pH, but was influenced by the salt composition of the test solution. For all test substances sorption to IEM was dependent on the substance concentration. Bovine serum albumin-water partition coefficients determined by passive sampling with IEMs agree well with those determined by the conventional dialysis method. The results of this study indicate that IEMs exhibit the potential to measure freely dissolved concentrations of organic ions in a simple and time-saving manner.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1370, 28 November 2014, Pages 17-24
نویسندگان
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