chemical analysis

• purity

  nothing has been added to it so its in its natural state
• the chemically pure substance will melt or boil at a specific temperate
• impurities in sample will lower the melting point and increase the melting range of the susbstance
• what is formulations?

  a useful mixtures with a precise purpose
• chromatography is used for ? detecting bombs in airport, detect criminals with fingerprints