Simultaneous trace multielement determination by ICP-OES after solid phase extraction with modified octadecyl silica gel.
Multielement simultaneous determination of 35 trace elements in environmental samples was carried out by inductively coupled plasma emission spectrometry (ICP-OES) after preconcentration with octadecyl silicagel, modified with aurin tricarboxylic acid (Aluminon). Optimal experimental conditions including pH of sample solution, sample volume, sample and eluent flow rate, type, concentration and volume of eluent and foreign ions effect were investigated and established. Trace element ions in aqueous solution were quantitatively adsorbed onto octadecyl silicagel modified with aurin tricarboxylic acid at pH 8.0 with a flow rate of 11.0 mL min(-1). The adsorbed element ions were eluted with 3-5 mL of 0.5 mol L(-1) HNO(3) at a flow rate of 10.0 mL min(-1) and analyzed by ICP-OES simultaneously. The proposed method has at least preconcentration factor of 100 in water samples, which results high sensitive detection of ultra-trace and trace analysis. The present methodology gave recoveries better than 70% and RSD less than 16%.
Karbasi
Mohamad-Hadi
MH
Iranian Mineral Processing Research Center, Ministry of Industry and Mineral, Karaj, Iran. mhkarbasi@yahoo.com
Jahanparast
Babak
B
Shamsipur
Mojtaba
M
Hassan
Jalal
J
D000327:Adsorption; D055620:Optical Phenomena; D012822:Silicon Dioxide; D052616:Solid Phase Extraction / Q000379:methods*; D013057:Spectrum Analysis / Q000379:methods; D014131:Trace Elements / Q000032:analysis* / Q000302:isolation & purification; D014873:Water Pollutants / Q000032:analysis* / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods
D014131:Trace Elements; D014873:Water Pollutants; C026679:octadecylsilica; D012822:Silicon Dioxide