WEEK 1&2 : fertilizer analysis, sample preparation for
BOE, BOE analysis, moisture analysis
washing the glassware
WEEK 3&4 : Theory about ICP-OES instrument,
preparation of leaf, soil and fertilizer
samples to be analyse in Elemental
Analyser, techniques on how to clean the
component inside the ICP-OES
WEEK 5&6 :determination of total phosphorus,
determination of available phosphorus,
determination of moisture content,
determination of pH, determination of
What is BOE?
B - Baja
O - Organik
E - Espek
the waste of the
do not contain any
the content of
nutrient is low
chemical or other
types of fertilizer
What is the
purpose of BOE
to determine how much the
amount of BOE fertilizer
needed for plants
to estimate how much nutrient
content in BOE fertilizer
to analyse the samples
whether it follow the
specification or not
The BOE samples were registered. The BOE samples were placed
inside the paper boat
The samples were dried in the
oven for few hours at 103º C
The samples were then grinded
until it become fine particles.
About 1.000g of sample was
weighed and the samples was
placed inside the crucible.
The samples undergo the ashing
process for 6 hours.
After 3 hours, the samples
undergo digestion process until
the solution become more viscous.
after 6 hours, the sample were
cooled down for a few minutes and
then, mixed with 2ml of 37% conc.
hydrochloric acid and leave it for
Then, the solution was mixed with 10 ml of
20% dilute nitric acid
The solution was then transfered
into the 100ml of volumetric
flask by using boiling water.
The sample solution inside
volumetric flask were then mark
up by using distilled water.
The samples were then palced in
water bath for few minutes until
the volume of sample become half
from its original volume.
12Lastly, the sample solution
were filtered into vial and
transfered into test tubes to be
analyse in ICP-OES.
Calculation for the factor of
= (2× 30.97) + (5× 16.0)
Calculation for the % for each element :
% = ppm × factor × volume of volumetric flask
% P = 68.72 × 2.29 × 100ml
each element contribute different nutrients for plants and soil.
Organic fertilizer have extra elements which contribute more nutrients for
plant instead of the common fertilizer which have the nutrients of nitrogen,
potassium and phosphorus.
organic fertilizer have the elements of Iron(Fe), Manganase(Mn) and
Copper (Cu) .
Nitrogen(N) Required for growth vegetative part.
Phosphorus(P) Required for healthy and strong roots.
Good for flower and fruits.
Potassium(K) Make the plants healthy by facilitating the circulation
within the plants.
Provide minerals for roots and plants.
What is the
structure of soil
increase the ability
to hold water and
of the soil