Preconcentration of Nickel Using Chemically Modified Silica Nanoparticles
Anupreet Kaur 1
Usha Gupta 1  
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Department of Chemistry, Punjabi University Patiala, Punjab, India
Usha Gupta   

Department of Chemistry, Punjabi University Patiala, Punjab, India
Publish date: 2017-10-06
Eurasian J Anal Chem 2009;4(2):175–183
A procedure has been developed for the preconcentration of trace amounts of Ni(II) in different samples using 1-(2-pyridylazo)-2-naphthol modified SiO2 nanoparticles as solid-phase extractant. Various parameters such as preconcentration factor, effect of pH, sample volume, shaking time, elution conditions and effects of interfering ions for the recovery of analyte have been optimized. The adsorption capacity of nanometer SiO2-PAN has been found to be 42.81µmol/g at optimum pH. The detection limit (3σ) has been found to be 0.43µg/L. The extractant showed rapid kinetic sorption. The adsorption equilibrium of Ni(II) on nanometer SiO2-PAN was achieved within 10mins. Adsorbed Ni(II) was easily eluted with 5mL of 6M hydrochloric acid. The maximum preconcentration factor has been found to be 60. The method has been applied for the determination of trace amounts of Ni(II) in different samples.
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