FIBER-PACKED NEEDLE FOR ANALYZING ALDEHYDES/KETONES, ANALYTICAL APPARATUS AND ANALYTICAL METHOD
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United States of America Patent
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app pub date -
Aug 1, 2008
filing date -
Feb 1, 2006
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Abandoned
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Abstract
Provided are a simple method for analyzing aldehydes and ketones in a sample, which does not require a complicated operation such as extraction with a solvent and concentration of the extract; and an analytical apparatus and a fiber-packed needle which are used in the analytical method. Also provided a fiber coated with hydrochloride or sulfate of 2,4-dinitrophenylhydrazine; a needle for microextraction in which the fibers are packed; the analytical apparatus including this needle and a suction device; the method for analyzing aldehydes and ketones in a sample, characterized by comprising sucking the sample through the needle in this analytical apparatus to allow the aldehydes and ketones in the sample to react with 2,4-dinitrophenylhydrazine, thereby converting them to the corresponding 2,4-dinitrophenylhydrazones; desorbing the 2,4-dinitrophenylhydrazones; and introducing the desorbed 2,4-dinitrophenylhydrazones into a chromatograph to analyze them.
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