A new sensitive reagent for identifying and determining Cu(2+)

The synthesis of the new long-chain saturated fatty hydrocarbon substituting group compound, N-undecyl-N'-(sodium p-aminobenzenesulfonate)-thiourea (UPT) is described. According to the studies on its analytical performance, it is found that this reagent can be used to identify Cu(2+)(PD 6.3) and determine microamounts of copper (epsilon(300.4 nm)=2.39x10(5) l mol(-1)cm(-1)) in aqueous solution. Both of their sensitivities and selectivity's are better than other common methods 1-3].These new methods are simple and convenient and can provide satisfactory results on samples.