what is the difference between the ordinary loss on drying technique and vacuum

what is the difference between the ordinary loss on drying
technique and vacuum oven technique?

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what is the difference between the ordinary loss on drying technique and vacuum oven technique?..

WE SHOULD USE VACCUME OVEN FOR THOSE COMPOUNDS WHICH HAVE
THE MELTING POINT BELOW 100C. IN THIS METHOD WE USE
PRESSURE AT 60C. THIS IS EQUAL TO 10 TIMES HIGHER THAN THE
TEMPARATURE WHAT WE APPLIED(60C).FOR THE COMPOUNDS WHICH
HAVE MELTING POINT ABOVE 100C, WE USE LOD OVEN

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