Physicalandinstrumentalmethodsareanalyticalmethodsbaseduponmeasurementsofphysicalpropertiesandmeasurementswithinstruments.Separationofthepropertiesofmatterintophysicalandchemicalpropertiesisarbitrarybutoftenconvenient.Aphysicalpropertycanbedefinedasaquali (共 1578 字) [阅读本文] >>