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Abstract: Employ of silica gel organically modified and ionically imprinted for selective on-line preconcentration of copper ions. The present work purposes the preparation of a silica gel sorbent organically modified with 2-aminoethyl-3-aminobutylmethyldimethoxysilane (Aamdms) And imprinted with cu2+ ions by means surface imprinting technique and its use for selective on-line sorbent preconcentration of cull ions with further uv-vis spectrophotometric determination by flow injection analysis. The cu2+-imprinted silica gel, when compared with non imprinted silica gel and silica gel, showed from the binary mixture of cu2+/ni2+ relative selectivity coefficient (K') Of 6.84 And 5.43 And 6.64 And 19.83 For the mixture cu2+/pb2+, thus demonstrating higher selectivity of cu2+-imprinted silica gel towards cull ions. Under optimized condition, the on-fine preconcentration method provided detection limit of 3.4 Mu g l-1 and linear range ranging from 30.0 Up to 300.0 Mu g l-1 (R = 0.995). The accuracy of method was successfully assessed by analyzing different kind of spiked water samples with recovery values ranging from 92.2 Up to 103.0%
Template and target information: Copper ions, Cu(II)
Author keywords: imprinted silica gel, Spectrophotometry, copper