Determination of trace chlorine dioxide based on the plasmon resonance scattering of silver nanoparticles.
A plasmon resonance scattering (PRS) method for chlorine dioxide is reported based on the oxidization of silver nanoparticles (NPs) by it, in pH 9.1 ammonia-ammonium nitrate buffer solutions. Silver NPs exhibit strong PRS signals at 470nm, and can be oxidized by ClO(2), which results in PRS quenching at 470nm. It was found that the PRS quenching intensity is proportional to the concentration of chlorine dioxide over the range of 0.0011-0.185microg/mL, with a detection limit (3sigma) of 0.00050microg/mL and the correlation coefficient of 0.9995. The method is simple, rapid and cost effective. It was applied to the determination of chlorine dioxide in drinking water, with satisfactory results.
Kang
Cai Yan
CY
College of Environmental Science and Engineering, Donghua University, Shanghai 200051, China.
Xi
Dan Li
DL
Chen
Yuan-Yuan
YY
Jiang
Zhi Liang
ZL
D002138:Calibration; D017606:Chlorine Compounds / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles; D010087:Oxides / Q000032:analysis*; D012834:Silver / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000379:methods*
D017606:Chlorine Compounds; D010087:Oxides; D012834:Silver; C025109:chlorine dioxide