自动电位滴定法测定双甘膦含量

Determination of N-(phosphonomethyl) iminodiacetic acid by automatic potential titrimetry

建立了自动电位滴定法测定双甘膦含量的方法。与利用偶氮胂指示剂变色来判定滴定终点的传统容量滴定法相比较,该方法具有操作简单、灵敏度高、重现性好、测试过程全自动化等优点,能够满足双甘膦含量测定的要求。

Traditional method for the determination of N-（phosphonomethyl） iminodiacetic acid （PMIDA） is the manual titrimetry using arsenazo as indicator. Since the change of color of arsenazo at the end point of titrition is not obvious, the titrition process is difficult to control. This paper recommentds an automatic potential titrimetric method for the determination of PMIDA. The method has the advanges of operational simplicity, higher sensitivity, good reproducibility, and fully automatic measurement process.