User:Samiye Yaman/Notebook/Lab 581/2013/03/08

Objectives

Description

• 0.1 g of PVOH with 0.25g of lecithin(synthesized on http://openwetware.org/wiki/User:Samiye_Yaman/Notebook/Lab_581/2013/02/22)is placed in to a vial. 5 ml of phosphate buffer was added. The solution with 0.1 f of PVOH with lecithin was sonicated for half an hour. 5μl of of R6G was added. In 15 minutes intervals, UV-vis measurements was taken to measure the amount of dye left in the solution. 1 ml of distilled water was added to the solution every time 1 ml was taken out for UV-Vis measurement.

• 0.1 g of PVOH without lecithin(synthesized on http://openwetware.org/wiki/User:Samiye_Yaman/Notebook/Lab_581/2013/02/22)is placed in to a vial. 5 ml of phosphate buffer was added. The solution with 0.1 f of PVOH without lecithin was sonicated for half an hour. 5μl of of R6G was added. In 15 minutes intervals, UV-vis measurements was taken to measure the amount of dye left in the solution. 1 ml of distilled water was added to the solution every time 1 ml was taken out for UV-Vis measurement.

Data

Figure 8: shows the UV-Vis spectra of the 0.1 g of hydrogel in 5 ml of phosphate buffer (series 1) and 0.1 g of hydrogel with lecithin in 5ml of buffer (series 2). Absorbance of PVOH with lecithin was lower than the observance of PVOH without lecithin. It was indicated that use of lecithin decreases the absorbance of the PVOH.

Notes