1. MOHAMAD RAAFI B AHMAD
TAIB
152036
(Practical Report Presentation)
2.
3. PRINCIPAL
Dry (Bomb) analysis
Instrument use Elemental Analyzer (EA)
For nitrogen
Wet analysis (solubility)
Organic material need to be converted to
inorganic material
Ashing (greyish-white)
Instrument use furnace and ICP
The elements contain in the leaves can be
diluted using dilute acid.
5. ASHING AND PREPARATION OF
ASH SOLUTION
Leaf need to be dry and grind to get homogenous.
Weigh about 1 to 2 g of the sample into a silica
dish.
Place the dish in the furnace (500⁰C for 5 hours)
until greyish-white
6. Add 2 ml Hydrochloric acid and evaporate to dryness
on a hot plate.
Add 10 ml of nitric acid and digest on a water-bath
for 1 hour.
7. Filter into a 100 ml volumetric flask using filter
paper.
Make up to volume with water and mix well.
10. Weight sample 0.1g ,put in 250 ml
Erlenmeyer flask
Add 5g Sodium carbonate
Add 100ml distilled water
Boil on Hot plate for 15-30 min
ANALYSIS OF SILICA
11. Pour 5 ml sulfuric acid
Boil in water bath (6 hours), leave 2 days
Filter samples & dilute 10 times
Pipette 10 ml sample & add molybdate, acid
reagent and citric acid (shake)
Obtain result from spectrophotometer
(410 nm yellow wavelength)