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Based on the advantage of high surface area and strong adsorption ability of potassium hexatitanate whisker, a method to determine trace Pb(II) content by combining solid phase extraction with Flame atomic absorption spectrometry (FAAS) was established. The adsorptive behavior of potassium hexatitanate whisker to Pb(II), primary influencing factors of adsorption and elution and effect of coexistence ions were investigated systemically. The optimal analytical conditions were discussed and examined. It was found that the adsorption rate of potassium hexatitanate whisker to Pb(II) was 100% at pH 4.0. Pb(II) could be eluted from potassium tetratitanate whisker with HCl (2mol/L) under boiling water for 30min. The detection limit was 5.75ng/mL, and relative standard deviation was 1.66% (n=9, CPb=2.0μg/mL).
Based on the advantage of high surface area and strong adsorption ability of potassium hexatitanate whisker, a method to determine trace Pb (II) content by combining solid phase extraction with Flame atomic absorption spectrometry (FAAS) was established. The adsorptive behavior of potassium hexatitanate whisker To was (II), primary influencing factors of adsorption and elution and effect of coexistence ions were investigated system examined. It was found that the adsorption rate of potassium hexatitanate whisker to Pb (II) was 100% at pH 4.0. Pb (II) could be eluted from potassium tetratitanate whisker with HCl (2 mol / L) under boiling water for 30 min. The detection limit was 5.75 ng / mL, and relative standard deviation was 1.66% = 2.0 μg / mL).