Determination of glyphosate in water samples by alternating-current oscillopolarographic titration.
This paper describes a novel, simple and sensitive method for the determination of glyphosate in water samples by alternating-current oscillopolarographic titration. Under an acidic condition, glyphosate can be transferred into a nitrosocompound by reacting with NaNO2. The titration end-point was obtained by the formation of a sharp cut in the oscillopolarographic with infinitesimal NaNO2 on double platinum electrodes. The results showed that glyphosate had an excellent linear relationship over the range of 7.16 x 10(-6) - 4.14 x 10(-3) mol L(-1), the RSD of the proposed method was lower than 3%, and the spiked recoveries of three real water samples were in the range of 97.7 - 100.2%.
Xiao
Junping
J
Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, P R China.
Zhou
Qingxiang
Q
Yang
Bo
B
Wang
Zhenzhen
Z
D005998:Glycine / Q000031:analogs & derivatives* / Q000032:analysis* / Q000737:chemistry; D011048:Polarography / Q000379:methods*; D014867:Water / Q000032:analysis / Q000737:chemistry*; D000097797:Glyphosate
D005998:Glycine; D014867:Water; D000097797:Glyphosate