[Determination of trace palladium based on kinetic-spectrophotometry with malachite green-sodium hypophosphite system].
A new kinetic-spectrophotometric method for the determination of trace amount of palladium has been proposed. It is based on the palladium catalysed discoloring reaction of malachite green reduced by sodium hypophosphite in phosphoric acid buffer solution (pH = 2.0). The linear range of determination of palladium is 0-10 microgram.L-1, the detection limit is 9.78 x 10(-11) g.mL-1. The method has been used for the determination of palladium in some catalyst with satisfactory results. The mechanism of the reaction has also been discussed.
Li
Jian-guo
JG
Department of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215006, China.
Qin
Xiao-feng
XF
Wei
Yong-qian
YQ
D007202:Indicators and Reagents; D007700:Kinetics; D010165:Palladium / Q000032:analysis*; D010721:Phosphinic Acids; D012394:Rosaniline Dyes; D013053:Spectrophotometry / Q000379:methods; D013056:Spectrophotometry, Ultraviolet / Q000379:methods
D007202:Indicators and Reagents; D010721:Phosphinic Acids; D012394:Rosaniline Dyes; C005095:malachite green; D010165:Palladium; C009287:sodium hypophosphite