不同容器中操作速度对分光光度法测定氰化物影响的比较

摘要

异烟酸-巴比妥酸分光光度法测定水中氰化物，在相同的操作速度下，采用100 ml容量瓶与25 ml比色管作为显色容器相比，前者能很好地抑制氰化物测定过程中的逸出损失，从而提高测定体系的稳定性、降低操作难度。操作过程中宜保持相同的快速操作节奏，宜快速一次性测完。%Under the same operating speed,both 100ml volumetric flask and 25ml colorimetric tube were used as the color container in the process of isonicotinic -barbituric acid spectrophotometric to test cyanide in water.The former can better inhibit the escape of cyanide loss,improve the stability of the measurement system,and reduce the operational complexity.