Magnetic solid phase preconcentration of cadmium in water samples using sulfonic acid functionalized Kit-6 magnetite mesoporous nanocomposites followed by flame atomic absorption spectrometry

2020 ◽  
Vol 17 (12) ◽  
pp. 3375-3382 ◽  
Author(s):  
Shahab Shariati ◽  
Nasrin Parto ◽  
Elahe Bozorgzadeh ◽  
Pegah Zanjanchi ◽  
Sara Rahnama
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Water Samples ◽  
Sulfonic Acid ◽  
Solid Phase ◽  
Absorption Spectrometry ◽  
Flame Atomic Absorption ◽  
Magnetic Solid

scholarly journals "ASSESSMENT OF THE TRACE LEVELS OF LEAD (II) USING SOLID PHASE EXTRACTION AND FLAME ATOMIC ABSORPTION SPECTROMETRY"

2006 ◽  
Vol 3 (2) ◽  
pp. 89-98 ◽  
Author(s):  
Mohammad Saber Tehrani ◽  
Majid Mohammadhosseini
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Water Samples ◽  
Solid Phase ◽  
Absorption Spectrometry ◽  
Silica Membrane ◽  
Flame Atomic Absorption ◽  
Interfering Ions

An efficient procedure for pre-concentration, separation and determination of the trace amounts of lead (II) ions in water samples has been established. The analyte is adsorbed on the surface of C18 silica membrane disk modified with APDC, quantitatively, while other interfering ions pass through the disk to drain. The sorbed Pb2+ ions are then stripped by appropriate eluting agents followed by monitoring of the eluates by flame atomic absorption spectrometry (FAAS). The effects of sample pH, amount of the modifier, stripping agent types, sample flow-rates, and potential interfering ions were also investigated. The described method involves a pre-concentration factor of about 200. The detection limit of the procedure is 0.93 ng.mL-1. The method was employed for isolation and determination of lead in different water samples.

scholarly journals Determination of trace copper in water samples by flame atomic absorption spectrometry after preconcentration on a phosphoric acid functionalized cotton chelator

2008 ◽  
Vol 73 (2) ◽  
pp. 249-258 ◽  
Author(s):  
Renmin Gong ◽  
Demin Zhang ◽  
Keding Zhong ◽  
Min Feng ◽  
Xingyan Liu
Keyword(s):  
Hydrochloric Acid ◽  
Phosphoric Acid ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Water Samples ◽  
Solid Phase ◽  
Absorption Spectrometry ◽  
Flame Atomic Absorption

This paper reports the preparation of a phosphorylated cotton chelator (PCC) by solid phase esterification of phosphoric acid (PA) onto defatted cotton fibres using urea as the catalyst. The synthesized PCC was employed for the preconcentration of copper from water samples prior to its determination by flame atomic absorption spectrometry (FAAS). The preconcentration of copper was studied under both batch and column techniques. The pH range for the quantitative preconcentration of copper was 4.0-7.0. The sorption time required for each sample was less than 30 min by the batch method. The copper sorption capacity of the PCC was found to be 15.3 mg/g at the optimum pH value. Elution with 1.0 mol dm-3 hydrochloric acid was found to be quantitative. Feasible flow rates of the copper solution for quantitative sorption onto the column packed with PCC were 0.5-4.0 ml min-1, whereas the optimum flow rate of the hydrochloric acid solution for desorption was less than 1.5 ml min-1. An 80-fold preconcentration factor could be achieved under the optimum column conditions. The tolerance limits for common metal ions on the preconcentration of copper and the number of times of column reuse were investigated. The proposed method was successfully applied for the preconcentration and determination of trace copper in natural and drinking water samples by FAAS.

scholarly journals Determination of Trace Silver in Water Samples by Online Column Preconcentration Flame Atomic Absorption Spectrometry Using Termite Digestion Product

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Joyce Nunes Bianchin ◽  
Edmar Martendal ◽  
Eduardo Carasek
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Water Samples ◽  
Solid Phase ◽  
Absorption Spectrometry ◽  
Injection System ◽  
Digestion Product ◽  
Flame Atomic Absorption

A new method for Ag determination in water samples using solid phase extraction (SPE) coupled to a flow injection system and flame atomic absorption spectrometry was developed. The sorbent used for Ag preconcentration and extraction was the termite digestion product. Flow and chemical variables of the system were optimized through a multivariate procedure. The factors selected were adsorbent mass, buffer type and concentration, sample pH, and sample flow rate. The detection limit and precision were 3.4 μg L−1and 3.8% (n=6, 15 μg L−1), respectively. The enrichment factor and the linear working range were, respectively, 21 and 10–50 μg L−1. Results for recovery tests using different water samples were between 96 and 107%. The proposed methodology was applied with success for the determination of Ag in water used to wash clothes impregnated with silver nanoparticles, supplied by a factory located in Santa Catarina, Brazil.

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