Performance Evaluation of Flame-Aas Coupled With Preconcentration Techniques for Estimating Cd,Cr,Cu,Pb, Ni and Zn in Sea Water

Roopali Ghode, Rajashree Muley and Rajkamal Sarin

National Environmental Engineering Research Institute, Nehru Marg, Nagpur-440 020,lndia.

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ABSTRACT:

The environmental monitoring data becomes credible when systematic analytical quality control exercises are carried out as its intrinsic component With this background a study was undertaken to evaluate the performance of Flame-AAS in terms of accuracy and overall precision for estimation of Cd, Cr, Cu, Pb, Ni & Zn at trace levels,in seawater samples. To facilitate preconcentranon of metals under study, techniques viz., ion-exchange and solvent extraction have been adopted .Through the statistical analysis of analytical values a comparison has been made for two different concentrations of eiuc-nt (HNO3) used in ion-exchange and also between the two preconcentration techniques.

KEYWORDS:

Analytical quality control; heavy metals; seawater; Ion-exchange; solvent extraction AAS; precision; accuracy