Detergent sample preparation
5.0 gm of detergent sample was weighed in a crucible
and placed in muffle furnace for about half an hour
at 330oC. Thus obtained ash was taken in a 250 mL
beaker. It was then dissolved in 50 mL of distilled
water. This solution was then acidified with sulphuric
acid and heated on a hot plate for about 10 minutes to
expel hydrogen sulphide, nitrite etc. It was then filtered
through a Whatmann-41 filter paper and the filtrate was
transferred into a 100 mL volumetric flask and diluted
up to the mark with distilled water and was used for the
phosphate analysis.
Fertilizer sample preparation
5.0 gm of fertilizer was weighed out and dissolved in
50 mL of distilled water. It was then filtered through
a Whatmann-41 filter paper and the filtrate was taken
in a 100 mL of volumetric flask and diluted up to the
mark with distilled water. From this method only water
soluble phosphate fertilizers were used for the phosphate
determination.
RESULT AND DISCUSSION