通过蒸馏提纯未反应的碱。
还原生成的三价铬的量或未反应的重铬酸钾的量能被测出。
Either the amount of reduced chromium or the amount of unreacted dichromate can be measured.
糠醇的单程产率在90%以上，出口混合物中没有未反应的糠醛。
The once-through yield of furfuryl alcohol is greater than 90%, and the outlet mixture contains no any unreacted furfural.
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