Question pmk oil testing

lucas_cash

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Μπορεί κάποιος να μου πει πώς μπορώ να ελέγξω και να δω αν το λάδι pmk είναι καλής ποιότητας ή όχι; Πώς να το ελέγξω αυτό; Υπάρχει κάποια μέθοδος γι' αυτό ή οτιδήποτε άλλο;
 

Osmosis Vanderwaal

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BouYHAxcwR
τι χρώμα είναι; Μυρίστε το απαλά. ΕΛΑΦΡΆ. Ελέγξτε το σημείο τήξης ή βρασμού. Ζυγίστε ένα cc από αυτό ή ζυγίστε 1,02g και δείτε ποιος είναι ο όγκος Υπάρχει πιθανώς ένα τεστ αντιδραστηρίου επίσης Δεν κοίταξα
 

lucas_cash

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Σας ευχαριστούμε ! Το ελέγχω αμέσως τώρα !
 

mycelium

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Stage 2 Qualitative Test for Piperonal


To determine the presence of piperonal (and aldehydes), a qualitative reaction with acid fuchsine is used. The color of the reagent changes to red, which indicates the presence of aldehydes in the sample.

Reagents and materials

  • ~50 mg Basic fuchsine (CAS 632-99-5)
  • 3-5 ml H2SO4 83%
  • ~10 mg Piperonal
  • 2-3 ml EtOH 88%
  • Test tubes
  • Beakers
  • Stand
  • Pipettes


Preparation of acid fuchsin solution:


Dissolve a small amount of fuchsin in concentrated sulfuric acid. The approximate concentration of acid fuchsin should be 1-2%. Fig 20

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Fig 20


Sample preparation:


A small amount of piperonal 1-2 drops or about 1-2 mg dissolved in a small amount of alcohol. Fig 21

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Fig 21


Carrying out the reaction:


Place 1–2 ml of acid fuchsin solution in a clean test tube.


Then add 1–2 drops of piperonal solution.


In the presence of piperonal, a characteristic violet or red color will form (according to the concentration). This indicates the presence of an aldehyde group in the analyzed substance. Fig 22


Not sure if this will work it was in the "piperine to mdp2np" post by @GhostChemist
 

GhostChemist

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The nitroprusside (Sodium nitroprusside CAS 13755-38-9) reaction is used for the identification of ketones
and
Haloform reaction (also referred to as the Lieben haloform reaction)
 
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