Improved sensitivity for some [corrected] metal ions by use of sulfide in the Belousov-Zhabotinskii oscillating reaction.
A highly sensitive method for the determination of trace amounts of some [corrected] metal ions by use of sulfide in the Belousov-Zhabotinskii (B-Z) oscillating chemical reaction is proposed. The use of sulfide increased strongly the sensitivity of the B-Z reaction for some [corrected] metal ions, such as Ag+, Pb2+, Hg2+, Cd2+, Cu2+, and Bi3+. Results showed that the variational ratio of oscillating period (P(R)) is linearly proportional to the negative logarithm of concentration of metal ions. The detection limit is down to 10(-12) mol L(-1). Various influencing factors on the determination were also examined.
Gao
Jinzhang
J
College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China. jzgao@nwnu.edu.cn
Chen
Hua
H
Dai
Hongxia
H
Lv
Dongyu
D
Ren
Jie
J
Wang
Lei
L
Yang
Wu
W