servo
Harmless
Posts: 16
Registered: 15-12-2018
Member Is Offline
|
|
Analysis of Amonium Phosphate
Hey everyone,
So I have found a very cheap source of Monoamonium Phosphate MAP and since it's almost 75% price of market I'm skeptical of it's purity
What is the the method for determination of percentage purity of Amonium Phosphate?
Preferably if there is a titration method..
Cheers
|
|
|
B(a)P
International Hazard
Posts: 1139
Registered: 29-9-2019
Member Is Offline
Mood: Festive
|
|
It would be somewhat crude, but you could add a molar equivalent of a salt such as calcium chloride that will yield a solid, then weigh the dried
product.
So you could have 0.1 moles of your MAP and 0.05 moles of calcium chloride each dissolved in appropriate volumes of dH2O. Add the two solutions then
filter off the solid, dry and weigh. You can then work out the percentage of the expected yield to determine purity. I have no idea what your
potential impurities might be, it might be worth identifying them first. If sulfate is a potential impurity then calcium chloride will obviously not
be a good candidate for this test.
|
|
|
Fulmen
International Hazard
Posts: 1725
Registered: 24-9-2005
Member Is Offline
Mood: Bored
|
|
Ammonia in fertilizers is traditionally determined by adding strong sodium hydroxide and distilling it into acid.
[Edited on 4-11-22 by Fulmen]
We're not banging rocks together here. We know how to put a man back together.
|
|
|
Bedlasky
International Hazard
Posts: 1243
Registered: 15-4-2019
Location: Period 5, group 6
Member Is Offline
Mood: Volatile
|
|
Phosphate can be precipitated by magnesium salt in ammoniacal solution as NH4MgPO4.6H2O - this can be then heated to form Mg2P2O7. Magnesium is
usually precipitated by solution containing 12 g MgCl, 16 g NH4Cl and 26 ml of 26% NH3 in total volume of 100 ml.
|
|
|
Texium
|
Thread Moved
22-11-2023 at 18:40 |
maldi-tof
Harmless
Posts: 45
Registered: 3-4-2019
Member Is Offline
|
|
You can always titrate with NaOH, until the first end point, which is around pH 8.
|
|
|
Rainwater
National Hazard
Posts: 937
Registered: 22-12-2021
Member Is Offline
Mood: Break'n glass & kick'n a's
|
|
Kjeldahl method
"You can't do that" - challenge accepted
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
