رسالة جامعية
Ανάλυση ανιόντων με φθορισμομετρία ακτίνων χ ; Anion analysis with x ray fluoresence
| العنوان: | Ανάλυση ανιόντων με φθορισμομετρία ακτίνων χ ; Anion analysis with x ray fluoresence |
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| المؤلفون: | Hatzistavros, Vasileios, Χατζησταύρος, Βασίλειος |
| بيانات النشر: | Technical University of Crete (TUC) Πολυτεχνείο Κρήτης |
| سنة النشر: | 2010 |
| المجموعة: | National Archive of PhD Theses (National Documentation Centre Greece) |
| مصطلحات موضوعية: | Φθορισμομετρία ακτίνων χ, Εκλεκτικές ανιοντικές μεμβράνες, Χημική ειδοταυτοποίηση, Εξασθενές χρώμιο, Βρωμικά ιόντα, Χ ray fluoresence, Anion selective membranes, Chenical speciation, Hexavalent chromium, Bromate anions |
| الوصف: | The present thesis is proposing a new method of analysis of chemical speciation and elemental detection with environmental significance by using anion selective membrane and analyzing them with TXRF. Specifically this method include the production and application of a mechanism of chemical speciation of elements of periodic table that due to their different form have different toxicity, bioavailability and effect on living organisms. Also a qualitative and quantitative detection of chemical elements is presented that have anionic form in water solutions. The above procedure is accomplished by the use of anion selective membrane, an analytical tool which allows the selective bound of the desirable element on a membrane polymer matrix. This polymer structure is immobilized on a quartz that have been enriched with certain chemical reagents which provide the membrane with anionic activity and selectivity towards their ability to complex several elements. Typical examples that are examined at the present thesis are the chemical speciation of toxic hexavalent chromium from the trivalent chromium and the discrimination of toxic bromates ions from the bromines in a water solution. The analysis of the membranes were performed by TXRF. Even though this technique offers only elemental analysis with the specific methodology, the discrimination between different forms of the same element is achieved. Taking into account the small time of samples analysis, the absence of pretreatment processes and other advantages that are mentioned, the specific instrumentation establishes as very practical and useful. The results of the present thesis can be used in the development of new experimental methods for the determination of chemical increased environmental and analytical interest as well as finding applications in the discrimination experiments of elements that are present in organometallic and inorganic forms the superiority of the method towards all known used analytical methods consist in its easy use, direct analysis of the ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | Greek, Modern (1453-) |
| العلاقة: | http://hdl.handle.net/10442/hedi/18975Test |
| DOI: | 10.12681/eadd/18975 |
| الإتاحة: | https://doi.org/10.12681/eadd/18975Test http://hdl.handle.net/10442/hedi/18975Test |
| رقم الانضمام: | edsbas.B0F8E2DE |
| قاعدة البيانات: | BASE |
| DOI: | 10.12681/eadd/18975 |
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