5-Aminothiazolinethiocarboxylic acid-2-amide may be used as a reagent for palladium(Ⅱ).The identification limit was found to be 0.003 γ(1:1, 000, 000), when the detection was carried out on paper with neutral or weakly acidic solutions.Among 34 cations studied, only Cu(Ⅱ), Pt(Ⅳ), Fe(Ⅲ), Ag(Ⅰ), Au(Ⅲ) and Hg(Ⅱ)interfered in neutral or weakly acidic solution.If spot chromatographic method or paper chromatographic method were used, Pd(Ⅱ) may be detected in the presence of considerable amount of those interfering cations.