There is no formalin or in food can
with the potassium test permanganat (KMnO4, sometimes called PK, abbreviations
Permanganas Kalikus, the color purple metallic black powder can be purchased
diapotik). This test is quite simple. With melarutkan potassium powder in water
permanganat until the pink color (pink seulas, the term teman2 analyst
chemicals).
If we put a snippet of food (eg know) to them, if
lost color pink (reduced), it is likely there components formalin.
This analysis is actually one of the dozens of standard test conducted
against fresh susu (which comes in powder factory susu) before the stated
received as a raw material, have this test.
Testing method:
Test tube containing 10 ml susu dibubuhi 1 drops KMnO4 solution 1 N.
Susu solution that will be the pink and white (pink seulas).
Long time lost color pink (pink seulas) of droplets
permanganat potassium solution into the test tube containing a sample of fresh susu
indicator is likely to be proactive in the susu in formalin.
1 hour if there is no change in color (the color pink stable) means susu
does not contain formalin (or more precisely it is said not to use
formalin as a preservative), and followed by a series of other test
before the stated acceptable as raw material.
If the pink color of the solution is immediately potassium permanganat weak / missing
not be colored, there is a possibility in the sample are susu
formalin that is responding to the color (mereduksi) potassium
permanganat.
False positive (false results) can only occur if the food
reduktor others are responding with potassium Permanganat for example
oksalat acid, etc..
But most of the food is food preserved vegetable / animal (fish
wet, meatball, know) that berprotein high likelihood is very small
contain acid oksalat naturally.