Study on the Determination of Hydrazine in Water by Acetone Derivatization-Headspace Gas Chromatography NPD
A method for the determination of hydrazine hydrate in water by acetone derivatization and headspace gas chromatography(NPD)was established.Hydrazine hydrate in water was derivated with acetone in a weakly alkaline or alkaline environment and treated by headspace,then separated by gas chromatography and detected by nitrogen and phosphorus detector(NPD).In this paper,the derivatization reaction conditions,salting-out effect,headspace temperature,headspace equilibrium time and acidity-alkalinity of reaction system were deeply researched.The results showed that the method had good linearity in the range of 0.020-1.00 mg/L(r=0.9997),and the detection limit of hydrazine hydrate was 0.004 mg/L(convert into 0.0025 mg/L by hydrazine).The method's repeatability and accuracy were good,RSD were 2.7%-5.8%and the recoveries were 89.6%-105%.Compared with the traditional spectrophotometry,the method has the characteristics of simple,rapid and strong anti-interference ability,and can better meet the current monitoring requirements of hydrazine hydrate in drinking water sources.
hydrazine hydrate in wateracetone derivatizationheadspacegas chromatography
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维普
