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KMID : 0370219820260040257
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Yakhak Hoeji
1982 Volume.26 No. 4 p.257 ~ p.260
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Determination of Water with Trifluoroacetic Anhydride by NMR
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李王圭/Lee, Wang Kyu
朴萬基/金博光/權世浩/成芳勳/Park, Man Ki/Kim, Bak-Kwang/Kwon, Se Ho/Seong Bang Hoon
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Abstract
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Measurement of water is a subject of continued interest. High resolution proton magnetic resonance has not been very effective in the determination of water. Especially spectral overlap with other proton signals from the sample is undesirable result. However, trifluoroacetic anhydride reacts´with´ water and forms trifluoroacetic acid and the proton signal of trifluoroacetic acid did not overlap with that of samples. By use of this fact, water in acetone, ethyl ether, dioxane, dichloroethane and methyl isobutyl ketone is analyzed by high resolution proton magnetic resonance (PMR). This method is capable of detecting as little as 200ppm of 1120. And it is very rapid, simple and accurate.
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KEYWORD
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