A simple and rapid analytical method for determining 1-naphthylamine was proposed by perturbation with different amounts of I-naphthylamine on the classical Belousov-Zhabotinskii (B-Z) oscillating chemical system. The results show that the changes both in oscillating period and amplitude were linearly proportional to the logarithm of the concentration of I -naphthylamine (log C) very well ranging from 7.08 x 10(-5) to 7.08 x 10(-6) mol L-1 and 7.08 x 10(-5) to 1.0 x 10(-6) mol L-1, with the corresponding regression coefficient are 0.9957 and 0.9922, respectively. For the later, a lower detection limit of 5.64 x 10(-9) mol L-1 was obtained. Influence of injection point, temperature and reactant variables on this oscillating system was also investigated in detailed. The results obtained were compared with other determination methods. A possible reaction mechanism was interpreted by using bromide ion selective electrode to inspect the concentration change of Br- ion in the oscillating process. (c) 2006 Published by Elsevier B. V.