Potential of chaotic chemical systems in nanotrace analysis based on the Belousov-Zhabotinskii reaction (BrO(-)(3)-malonic acid-ferroin). Determination of manganese(II).

A new method for the determination of trace amounts of manganese(II) in aqueous solutions by its affect on some types of the chaotic regimes in the Belousov-Zhabotinskii reaction has been proposed. The method is based on the high sensitivity of some types of chaotic regimes of the BZ reaction to small perturbations of initial conditions (e.g., low concentrations of some metal ions). The experimentally obtained detection limit for manganese is 3 pg/ml.

Catalytic kinetic methods for the determination of platinum metals.

A review is given of developments over the last two decades in the determination of platinum metals by catalytic kinetic methods.