Abstract
A method is described for the determination of hydrazine residue in water. Hydrazine is converted to the acetone azine, which is extracted with methylene chloride and determined by gas chromatography using a nitrogen/phosphorus detector. The limit of detection is 0.1 part per billion (10 9), and the recoveries ageraged 92% for water fortified with 0.1 to 10 parts per billion of hydrazine. The derivatization of trace levels of hydrazine with a large excess of acetone was compared in a predominantly aqueous system and a methanolic system. The derivatization proceeds quantitatively in 53 min in the methanolic system and in less than 2 m in in the aqueous system. Excellent yields of the azine were obtained at ppb levels.
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