Synthesis of gold nanoparticles using pH-sensitive hydrogel and its application for colorimetric determination of acetaminophen, ascorbic acid and folic acid

Hydrogel is a network of polymer chains that are hydrophilic, sometimes found as a colloidal gel in which, water is the dispersion media. In this work a new synthetic hydrogel polymer was applied to synthesis the gold nanoparticles (GNPs). Poly(styrene-alt-maleic acid) pH-sensitive hydrogel, which bears negatively charged COO− groups was used for this purpose. In this work hydrogel acts both as reducing and stabilizer agent.