无水乙酸钠含量的快速测定

Rapid Quantitative Analysis for the Content of Sodium acetate anhydrous

研究了对无水乙酸钠含量的快速测定。具体方法为:精确称取无水乙酸钠0.2g,加30mL冰乙酸、1mL乙酸酐、2滴结晶紫指示剂,用高氯酸标准溶液病定至溶液由蓝紫色变为绿色。电位滴定法与指示剂法的测定结果一致,极差0.3％。此方法容易操作、滴定终点清晰、准确可靠、重复性好。

A rapid method of quantitative analysis for the content of sodium acetate anhydrous by perchloric, acid non -aqueous titration was studied. It was carried out in mixed solvent of glacial acetic acid (30mL) and acetic anhydride (1mL) with crystal violet as indicator. The results coincided with that by potentiometry. The maximum error is less than 0. 3%. This method provides easy operation and clear titration endpoint, and is accurate, reliable and with good repeatability.