Direct liquid chromatographic determination of hydrazines: A review

Today the determination of hydrazines is an important application in analytical chemistry. This review shows the current state-of-the-art analyses and discusses the merits of the direct chromatographic methods for the determination of hydrazines such as ion-, ion-exclusion, ion-pair and hydrophilic interaction chromatography. The methodological aspects of the separation and detection of hydrazines are considered for these methods. Examples of hydrazine determination in real samples are presented. ► All methods for direct determination of hydrazines were considered. ► They are ion, ion-pair, ion-exclusion and hydrophilic interaction chromatography. ► Separation selectivity and sensitivity of detection are discussed for each method. ► Advantages of direct methods over ones based upon derivatization were proved.