目的探索用电位滴定法测定消毒剂中戊二醛含量的方法。方法利用电位滴定法测定消毒剂中戊二醛的含量,建立测定条件。结果用电位滴定法测定浓度为4~21 g/L的戊二醛时,与硫酸滴定液的消耗量呈完全的线性相关(r=1.000)。高、低浓度的加标回收率均值都在98%以上。电位滴定法与人工滴定法所测结果无差别。结论本法在测定消毒剂中戊二醛含量时,具有终点判断敏锐、准确度高、精密度好等优点,值得推广应用。 Objective To explore the potentiometric titration method for the determination of glutaraldehyde in disinfectant. Methods The content of glutaraldehyde in disinfectant was determined by potentiometric titration and the determination conditions were established. Results The glutaraldehyde concentration of 4-21 g / L was completely linearly correlated with the titration of sulfuric acid solution (r = 1.000) when potentiometric titration was used. The average recoveries of high and low concentrations were over 98%. There is no difference between potentiometric titration and manual titration. Conclusion The determination of glutaraldehyde in the disinfectant has the advantages of sharp endpoint, high accuracy and good precision, which is worth popularizing and applying.