兑水 发表于 2009-12-8 06:32:53

ASTM F 2260-2003 通过质子核磁共振（1H NMR）光谱测定脱....

F2260-03 Standard Test Method for Determining Degree of Deacetylation in Chitosan Salts by Proton Nuclear Magnetic Resonance (1H NMR) Spectroscopy
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