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一、概述甲醛的测定方法有多种。近代仪器分析法因仪器昂贵,不能在大多数工厂或实验室内普及应用。常规滴定法又存在使用试剂较多、测定过程较繁琐或终点不易观察等缺点。近年来,报道了采用盐酸羟胺自动电位滴定法测定甲醛。但自动电位滴定及绘制滴定曲线所使用的仪器价格仍较高,在我国暂不能被广泛使用。另外,该方法采用饱和Na_2B_4O_7水
First, an overview of formaldehyde determination of a variety of ways. Modern instrumental analysis method because of expensive equipment, can not be widely used in most factories or laboratories. Conventional titration and there are more reagents to use, the measurement process is more cumbersome or difficult to observe the end point and other shortcomings. In recent years, reported the use of hydroxylamine hydrochloride potentiometric titration method for the determination of formaldehyde. But the automatic potentiometric titration curve and the instrument used in the price is still high, in our country can not be widely used. In addition, the method uses saturated Na 2 B 4 O 7 water