Zhang Wende, Sun Shiping, Ma Zhidong, Guo Zhong
Tangshan Center for Disease Prevention and Control, Tangshan 063000, China.
Wei Sheng Yan Jiu. 2003 Jul;32(4):391-3.
The polarographic behavior of the reaction product of formaldehyde and phenyldrazine hydrochloride on the drop mercury electrode was investigated in a medium of 0.01 mol/L H3PO4 and sensitive second order polarographic reduction wave was obtained at -0.76 V (vs. SCE). The optimum conditions and disturbance of other co-existing substances were also studied, and were compared with those of national standard method. In the study, the detectable range, detection limit, recovery rate, relative standard deviation(RSD) of the improved method were 0.005-0.25 mg/L, 0.005 mg/L, 92.3%-104.6%, 1.1%-3.0% respectively, revealing the accordance with the national standard method.
