Page 142 - Pharmaceutical Analytical Chemistry III
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5) Drying and ignition

• Drying: heating the ppt at temperature
  <250°C not accompanied with change
  in chemical structure of ppt
   Ex: AgCl

• Ignition: heating the ppt at temperature
  > 250°C usually accompanied with
  change in chemical structure of ppt
   Ex: CaC2O4.H2O
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