Rapid Determination of Trace Formaldehyde in Drinking Water by Oscilloscopic Polarography
- VernacularTitle:饮用水中痕量甲醛的单扫示波极谱快速测定法
- Author:
Zhidong MA
;
Zhong GUO
;
Wende ZHANG
- Publication Type:Journal Article
- Keywords:
Formaldehyde;
Phenylhydrazine hydrochloride;
Oscilloscopic polarography;
Drinking water
- From:
Journal of Environment and Health
1993;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study a rapid method for determination of trace formaldehyde in drinking water by oscilloscopic polarography.Methods In the base solution of0.01mol/L H 3 PO 4 ,the reaction product of formaldehyde and phenylhydrazine hydrochloride on the drop mercury electrode revealed a sensitive second order derivative polarographic wave at a pick electric potential-0.76V(VS?SCE).The optimum conditions and interference by other coexisting ions were analyzed.Results The de-tection limit,linear range,recovery rate,relative standard deviation(RSD)of the method were0.002mg /L,0.005-0.25mg /L,94.0%-103.0%,and0.05).Conclusion The method was simple,rapid,sensitive and highly specific.The analytical speed was about 50-60samples /h,which was suitable for the determination of trace formaldehyde in drinking water.
