Page 73 - Feed Lab

Suguna Management System Ver 1.0 / SOP / FQL / P2 - 07 Page 1 of 2

7. Estimation of Total Ash

SCOPE
To estimate the Total ash in feed and feed stuffs.

PRINCIPLE
The total content of mineral matter i.e. Non-
combustible portion of the feed is called total ash.

APPARATUS
Picture-3 Picture-4
FAnalytical Balance, 1 mg / 0.1 mg accuracy
(Picture-2)
PROCEDURE
FMuffle furnace (Picture - 1) FTake silica crucible record empty weight (A) and

FSilica crucible, 25 ml (Picture - 3) tare it. (Picture - 5)

FDesiccators. (Picture - 4) FThen weigh 2 gm of sample in a silica crucible.
Ignite the sample on a burner till smoke cease off.
(Picture - 6)

FPlace the crucible in a muffle furnace and heat to
o
o
600 C +/- 20 C. Kept for 90 minutes. At this
temperature all organic matter will be burnt leaving
behind minerals. Remove the crucible from the
furnace carefully and cool it in desiccators to room
temperature and weigh again (B).(Picture - 7)

Note:
1. The ash may be used for the determination of
Picture-1 Picture-2
minerals and acid insoluble ash.
2. Since the ash is hygroscope, weighing should be
done quickly after taken out from dessicator.

Prepared by : Approved by :
61 Director - Technical