Abstract
A new XAD-2/Me-BTAP resin has been developed and applied in an on-line system for the preconcentration followed by metal determination by FAAS. The reagent used in the resin synthesis was 2-[2'-(6-methyl-benzothiazolylazo)]-4-aminophenol (Me-BTAP), a compound produced by first time for the application described in this work. The reagent and resin were characterized and the sorbent was used as packing for the minicolumn in an on-line system preconcentration system for cobalt, copper and nickel determination. The enrichment factors calculated were 19 (Co), 12 (Cu) and 12 (Ni), for 60 s preconcentration time, and 30 (Co), 30 (Cu) and 24 (Ni), if used 180 s preconcentration time. The proposed procedure allowed the determination of cobalt, copper and nickel with limits of detection 0.34, 0.87 and 0.81 µg L-1, respectively, when used preconcentration periods of 180 s. The accuracy of the developed procedure was evaluated by the analysis of certified reference materials. The method was applied to the analysis of food samples (black tea and rice flour).
Highlights
In recent years, solid-phase extraction (SPE) has become a very important technique for metal, because of its advantages over liquid–liquid extraction such as simplicity, reliability, good metal loading capacity and ability to obtain high enrichment factors.[1,2] Very versatile systems has been obtained as result of the application of solid supports loaded or functionalized with complexing reagents.[3,4] These systems could be used for preconcentration and determination of cations in a wide range of samples.[5,6,7] A great advantage of theMany methods have been reported to use combinations of sorbent-ligant to synthesise powerful material for metal preconcentration and determination
The aim of this study is the application of a new XAD-2/ Me-BTAP resin in an on-line system for the preconcentration followed by the determination of cobalt, copper and nickel by Flame Atomic Absorption Spectrometry (FAAS)
The results showed that both acids used could accomplish the quantitative elution of all metals
Summary
Solid-phase extraction (SPE) has become a very important technique for metal, because of its advantages over liquid–liquid extraction such as simplicity, reliability, good metal loading capacity and ability to obtain high enrichment factors.[1,2] Very versatile systems has been obtained as result of the application of solid supports loaded or functionalized with complexing reagents.[3,4] These systems could be used for preconcentration and determination of cations in a wide range of samples.[5,6,7] A great advantage of theMany methods have been reported to use combinations of sorbent-ligant to synthesise powerful material for metal preconcentration and determination. Solid-phase extraction (SPE) has become a very important technique for metal, because of its advantages over liquid–liquid extraction such as simplicity, reliability, good metal loading capacity and ability to obtain high enrichment factors.[1,2] Very versatile systems has been obtained as result of the application of solid supports loaded or functionalized with complexing reagents.[3,4] These systems could be used for preconcentration and determination of cations in a wide range of samples.[5,6,7] A great advantage of the.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
