Dodecanol abietate succinic anhydride was synthesized from abietic acid.The structures of products were characterized by spectrum of IR，HNMR and MS.

以枞酸为起点，合成了十二醇酯琥珀酸酐，采用红外光谱、核磁共振波谱及质谱对中间产物及终产物进行了结构表证。

The metol content and the hydroquinol content in developer solution were analyzed by potential spectrum method.During this analysis, two components were continuously titrated at the same time.

采用一化分法电位波谱法分显影液中米吐尔和对苯二酚含量,在研究过程中实现了这两成分连续滴定分。