8-羟基喹啉合镁碳糊修饰电极的研究

Study on Chemical Modified Carbon Paste Electrode of Magnesium-8-Hydroxylquinoline

本文研制了8-羟基喹啉合镁碳糊修饰电极,并研究了电极性能.实验发现,该修饰电极具有类化学传感器的特性,电极在一定条件下对Mg^(2+)离子有类能斯特响应.电极用于试样分析取得成功.

A chemical modified carbon paste electrode was prepared by adding magnesium-8 -hydroxylquinoline directly into the paste mixture, and the property of the electrode was researched. The electrode was noted for the characteristic of the chemical sensor, it gives a lin-ear response of the potential with respect to the logarithm of magnesium concentration in the range of 8×10-5-1× 10-2 mol/L with a slope of 26. 5-29 mV/dec, and the detection limit was 5×10-5 mol/L. The electrode was successfully applied to the determination of magnesium in cement clinker.