Solid Phase Extraction of trace Cd(II) ions in water samples by Modified nano graphene oxide nano-plate

The present method is a Flame atomic absorption spectrophotometric (FAAS) method for determining of trace Cd(II) after adsorption by modified by 2-aminopyridine/graphene oxide nano-plates. modified by 2-aminopyridine/graphene oxide nano-plates has a good capacity to retain Cd(II), but raw and purified as graphene oxide nano-plates does not absorb Cd(II) ions. Graphite Flame Atomic Absorption Spectroscopy (FAAS) was used to determine Cd(II). The effects of solution pH, washing conditions on the trace preconcentration of Cd(II) were studied and the effect of interfering ions was also investigated. The preconcentration factor of 100 was obtained. The method was successfully used to recover Cd(II) in various water samples. modified by 2-aminopyridine/graphene oxide nano-plates in this study has a high potential to be used as an excellent adsorbent in a separation method such as dispersive solid phase extraction (DSPE). The limit of detection of the proposed method is 20 μg l−1. The maximum sorption capacity of the sorbent under the optimum conditions has been found to be 5mg of Cd(II) per gram of sorbent. The relative standard deviation under the optimum conditions was 2.2% (n= 10).