Abstract
A new adsorbent for determination of Pb and Cu by flame atomic absorption spectrometry (FAAS) was synthesized and characterized with different techniques. The effect of various parameters such as the pH, the type and volume of eluent, amount of adsorbent, sample volume and interfering ions were optimized. Under the optimized conditions, a linear calibration graph was obtained for determination of Pb(II) and Cu(II). The linear ranges were found to be 15-500 µg L-1 and 18-500 µg L-1 for lead and copper, respectively. The limit of detection and limit of quantification were 4.3 and 14.5 µg L-1 for lead and 5.0 and 16.7 µg L-1 for copper, respectively. The relative standard deviation for eight replicate determinations of 80 and 200 µg L-1 of Pb(II) were 2.9 and 1.4% and for Cu(II) were 3.5 and 1.9%, respectively. Applicability of the method was evaluated by analyzing trace amounts of lead and copper in different water samples.
Highlights
IntroductionThe entry of pollutants of heavy metals has increased in the global ecosystem.[1]
In the past decade, the entry of pollutants of heavy metals has increased in the global ecosystem.[1]
Several techniques for measuring these elements have been employed such as flame atomic absorption spectrometry (FAAS),[3,4] electrothermal atomic absorption spectrometry (ETAAS),[5] inductively coupled plasma mass spectrometry (ICP-MS),[6] inductively coupled plasma optical emission spectrometry (ICP-OES)[7,8,9,10] and spectrophotometry.[11]
Summary
The entry of pollutants of heavy metals has increased in the global ecosystem.[1]. Several techniques for measuring these elements have been employed such as flame atomic absorption spectrometry (FAAS),[3,4] electrothermal atomic absorption spectrometry (ETAAS),[5] inductively coupled plasma mass spectrometry (ICP-MS),[6] inductively coupled plasma optical emission spectrometry (ICP-OES)[7,8,9,10] and spectrophotometry.[11] Among these, FAAS, due to its simplicity and its lower price is more common than other instruments This technique has no sufficient sensitivity in direct determination of metals, separation and Synthesis and Application of Magnetic Nanoparticle Supported Ephedrine as a New Sorbent. Mass of 1.500 g MNPs powder was dispersed in 250 mL ethanol/water solution with volume ratio, 1:1 by sonication for 30 min, and 2.5 mL CPTMS (99%) was added to the mixture. For elution adsorbed analyte ions from nanoparticles, 2.0 mL H2SO4 and HCl mixtures (0.5 mol L−1 each one) with 2:1 volumetric ratio were added and the solution was again sonicated for 6 min and exposed on the magnet to deposit the magnetic nanoparticles. Afterwards, the eluate containing metal ions was determined by FAAS, using the conditions recommended by the manufacturer with a flow rate of 2.0 mL min−1
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