Page 472 - Applied Pharmacognosy

• Total ash is also useful to detect low - grade products
by the addition of earthy matter
( silica ).

Determination of Total Ash

• a platinum dish is heated to redness for 10
minutes

• allow to cool in a desiccator & weigh
………..W • place 2 – 3 g of the plant
material in the dish & weigh

…………………………….
…………………………………..W1