A new sensitive reagent for identifying and determining CU2+

The synthesis of the new long-chain saturated fatty hydrocarbon substitutin g group compound, N-undecyl-N'-(sodium p-aminobenzenesulfonate)-thiourea (U PT) is described. According to the studies on its analytical performance, i t is found that this reagent can be used to identify Cu2+(PD 6.3) and deter mine microamounts of copper (epsilon(300.4) (nm) = 2.39 x 10(5) 1 mol(-1)cm (-1)) in aqueous solution. Both of their sensitivities and selectivity's a re better than other common methods [1-3]. These new methods are simple and convenient and can provide satisfactory results on samples. (C) 1999 Elsev ier Science B.V. All rights reserved.