کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5210426 | 1382893 | 2012 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis of crown ether modified cation exchange polymer particles for 90Sr urinalysis
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Cation exchange polymer particles have been synthesized for urinalysis to monitor levels of strontium-90 (90Sr) exposure in humans. Two techniques were utilized in the incorporation of a Sr2+ selective chelating agent, di-tert-butyl-cyclohexano-18-crown-6 (DtBuCH18C6). The ion imprinting technique involved entrapment of DtBuCH18C6 during the formation of 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) polymer particles. In the surface immobilization technique, adsorption of DtBuCH18C6 onto the surface of AMPS polymer particles was assisted by a molecular modifier. Ethylene glycol dimethacrylate (EGDMA) and divinylbenzene (DVB) were evaluated as cross-linking agents to provide better support for DtBuCH18C6. These polymer particles were characterized by scanning electron microscopy, dynamic light scattering, and Fourier transform infrared spectroscopy. Radiometric binding assays demonstrated that surface immobilization, in comparison to matrix imprinting, achieved greater Sr2+ uptake. Application of the surface immobilized particles in urinalysis was successful, attaining 86 ± 2% 90Sr uptake at pH 9.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reactive and Functional Polymers - Volume 72, Issue 5, May 2012, Pages 295-302
Journal: Reactive and Functional Polymers - Volume 72, Issue 5, May 2012, Pages 295-302
نویسندگان
Amy Hrdina, Edward Lai, Chunsheng Li, Baki Sadi, Gary H. Kramer,