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Application of 1‐(2‐Pyridylazo)‐2‐naphthol Anchored SiO 2 Nanoparticles for the Preconcentration of Trace Pb 2+ from Different Water and Food Samples
Author(s) -
Kaur Anupreet,
Gupta Usha
Publication year - 2009
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200990308
Subject(s) - chemistry , sorbent , adsorption , sorption , detection limit , elution , trace amounts , nuclear chemistry , enrichment factor , hydrochloric acid , formaldehyde , nanoparticle , chromatography , analytical chemistry (journal) , inorganic chemistry , chemical engineering , organic chemistry , medicine , alternative medicine , pathology , engineering
SiO 2 ‐PAN nanoparticles has been synthesized by reacting silica nanoparticles with 3‐aminopropyltriethoxysilane, formaldehyde and 1‐(2‐pyridylazo)‐2‐naphthol and characterized by FT‐IR and SEM which were used as new sorbent for the preconcentration of trace amount of Pb 2+ from various samples. Conditions of the analysis such as preconcentration factor, effect of pH, sample volume, shaking time, elution conditions and effects of interfering ions for the recovery of analyte were investigated. The adsorption capacity of the nanometer SiO 2 ‐PAN was found to be 168.34 μmol/g at optimum pH and the detection limit (3 δ ) was 0.63 µg/L. The extractant showed rapid kinetic sorption. The adsorption equilibrium of Pb 2+ on the nanometer SiO 2 ‐PAN was achieved within 15 min. Adsorbed Pb 2+ was easily eluted with 6 mL of 4 mol·L −1 hydrochloric acid. The maximum preconcentration factor was 50. The method was applied to determine trace amounts of Pb 2+ in different samples (water and food samples).