Sunday 30th of April 2017
Iranian researchers used proteins in eggshell to synthesize a nanocomposite to detect the environmental pollution
TEHRAN (INIC)- Iranian researchers used proteins in eggshell to synthesize a nanocomposite to detect the environmental pollution.
Numerous efforts have been carried out to measure the amount of hazardous silver in biological samples due to its high toxicity and bioaccumulation. Analytical methods have been used in this regard. However, the majority of methods are time-consuming and expensive and they require complicated equipment. Therefore, researchers still try to present new analytical methods in a cheaper and more accurate manner.
Nanocomposite synthesized in this research is cost-effective and biocompatible and can effectively improve sensitivity of the analytical method and analysis rate in the measurement of small amounts of silver in biological samples.
Eggshell membrane is a biopolymer made of protein, which is seen in the form of nanofibers under the microscope. This type of morphology provides a high ratio of surface to volume, which can have high sorption capacity or catalytic activity from chemical point of view.
In addition, carbon nanoparticles, specially reduced graphene, has strong sorption behavior for a wide range of polluting chemicals. In this research, sorption properties of eggshell membrane and graphene oxide have been used to pre-concentrate silver ions and their measurement through stripping voltammetry method by creating a nanocomposite structure of eggshell membrane and graphene oxide.
Based on test results, the proposed method has a detection limit of 0.14 ng/mL.
Results of the research have been published in Microchimica Acta, vol. 183, issue 2, 2016, pp. 555-562.