Abstract

Chayanee Kaewprom¹, Prawit Nuengmatcha² and Saksit Chanthai¹

DOI : http://dx.doi.org/10.13005/ojc/340203

Resonance light scattering (RLS) probe for sensitive determination of heavy metals such as lead (Pb) based on diethyldithiocarbamate (DDTC) doped graphene quantum dots (GQDs) is subject to approach on green procedure of metal complex nanoparticles. Regarding Pb(II), the RLS intensity of GQDs-DDTC increases linearly by an enhancement mechanism. Interactions between target analyte and the ligand doped nanoparticles lead to an aggregation of the complex particles to form bigger volume of the metal complex. Thus, it can be used as the RLS probe for such determination of lead ion at ultra-trace level, certainly under the optimum conditions; such experimental parameters including each of DDTC and GQDs concentration, pH of solution, ionic strength, masking agent, and interfering ions are investigated in details. The methods can then be implied for selective determination of some relevant toxic heavy metals in water, foods or environment samples.

Diethyldithiocarbamate; Resonance light scattering; Graphene Quantum Dots; Heavy Metals; Nanoparticles

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