Yellow, red, yellow, red
The result is: yellow, red
Smell and taste: (Test method: GB/T5525-2008)
Take a small amount of oil sample and pour it into a beaker, heat it to 50℃ and stir it with a glass rod while smelling it and taste it at the same time. This oil sample --------
Acid Value: (Test method: GB/T5009.37-2003)
The instrument used is analytical balance (d=0.1mg) Model: ****** Number: ********
Method description: Weigh 3.00g~5.00g of the sample into an Erlenmeyer flask, add 50ml of neutral alcohol ether, shake to dissolve, add 2 drops of phenolphthalein indicator solution (10g/L), and add hydrogen Titrate the sodium oxide standard titration solution until a slight red color appears and does not fade within 30 seconds.
C (NaOH) = mol/L m (mass of sample) = g
V (volume of NaOH consumed by sample) = mL
Acid value =
c×V×56.1
=
× ×56.1
=
m
C (NaOH) = mol/L m (mass of sample) = g
V (volume of NaOH consumed by sample) = mL
Acid value =
c×V×56.1
=
× ×56.1
=
m
Average : mg/g Rounded to: mg/g