seminars_he

Development of sensitive colorimetric analytical methods using electrospun polymeric matrixes

סמינר כימיה פיזקאלית ואנאליטית

מרצה: Hodayah Hadar Markovits

תאריך:
15-15 Aug 2017 @ 15:30

מיקום: חדר סמינרים פקולטי

Abstract:

The goal of the research is to harness the advantages of electrospun matrixes for analytical purposes. Electrospun polymers bring many advantages, they are versitile, and can be tailor designed to attain any thought of property: transparency, specific solvent and thermal durability, conductivity, hydrophilicity/phobicity and specific absorption. This versatility can be exploited to the benefit of the analytical method electrospun fibers are like clay in the hands of the potter. With tunable chemical attributes, determined by the composition. And with high ratio of surface area to unit mass- electrospinning can enhance the sensitivity of the analytical method.

In my research, I have investigated two major analytical problems. The first is a sensitive colorimetric method for quantification of ninhydrin reactive nitrogen using electrospun PAA-PVA nanofibers. The second is a qualitative analysis of explosives using electrospun superabsorbent polymers and multiple sensitive color reagents. In both methods, the electrospun matrix acted both as the sampling apparatus and the substrate for the colorimetric detection reaction. Both methods, the NRN and explosive detection, portray a good sampling capability and sensitivity.