Abstract:
Determination of a suitable gamma radiation dose for depolymerization of pectin was conducted and used as an allergenic rubber latex protein scavenger. Pectin from sunflower head was extracted by water. HCI solution of pH 4 and HCI solution of pH 2 at 90 degree Celsius for 60 minutes. Highest pectin yield was from water extraction, the yield was 0.4% of wet sunflower head. 5.0% pectin solution was gamma irradiated at 2,4,6,8 and 10 KGy resulted in lowering of viscosity average molecular weight 6.57x10[superscript4], 4.20x10[superscript4], 3.30x10[Superscript4], 2.08x10[Superscript4]nd 1.36x10 [Superscript4] Da respectively as determined by viscosity measurement. Irradiated pectin solutions were added into twice diluted concentrated latex at concentration of 1.0, 1.5, 2.0 and 2.5 phr, stirred and left overnight prior to centrifuge at 8000 rpm for 60 minutes to obtain concentrated latex. Rubber films so obtained from the latex were analyzed for allergenic protein content by ELISA method. It was found that rubber from adding of 4 kGy irradiated pectin at concentration of 1.5 phr showed lowest allergenic protein of 1.5 ppm, 80.26% decreased from the control latex.