Application of nanoclay for preconcentration of ultra trace  amounts of palladium in environmental samples prior  to its determination by ETAAS.
In the present work, a batch preconcentration technique using nanoclay with 5-(4-dimethylaminobenzylidene)rhodanine coupled with electrothermal atomic absorption spectrometry was developed for the separation and determination of trace amounts of palladium. In this method, the sample solution was stirred with nanoclay as an adsorbent. Then, adsorbed palladium was subsequently eluted with HCl in acetone (1.5 mol L−1) and, finally, this eluate was injected to electrothermal atomic absorption spectrometry. Under the optimum conditions, the limit of detection and linear dynamic range were found to be 2.6 and 10.0–133 ng L−1 (in original solution), respectively. Furthermore, the enrichment factor and relative standard deviation of seven replicate determinations were 148 and ±5.1 %, respectively. This suggested method is simple, selective and sensitive and can be applied to the extraction and determination of palladium in water, tea leaves, synthetic sample and certified reference material with satisfactory results.
Mohammad Ali
MA
Taher
Nezhat
N
Jandaghi
Hamid
H
Fazelirad
Hamid
H
Ashkenani
D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D000077215:Clay; D004784:Environmental Monitoring / Q000379:methods*; D004785:Environmental Pollutants / Q000032:analysis*; D010165:Palladium / Q000032:analysis*; D013662:Tea / Q000737:chemistry; D014867:Water / Q000737:chemistry
D000538:Aluminum Silicates; D004785:Environmental Pollutants; D013662:Tea; D014867:Water; D010165:Palladium; D000077215:Clay