April 20, 2024, 12:39:22 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: phosphorus  (Read 4577 times)

0 Members and 1 Guest are viewing this topic.

Offline abcc

  • Regular Member
  • ***
  • Posts: 86
  • Mole Snacks: +1/-5
phosphorus
« on: December 10, 2006, 03:39:14 PM »
what are the methods to analyse phosphorus content in plant food?
any suggestions  ???
thx ;)
Logged

Offline Alberto_Kravina

  • Assault Chemist
  • Retired Staff
  • Full Member
  • *
  • Posts: 608
  • Mole Snacks: +70/-15
Re: phosphorus
« Reply #1 on: December 10, 2006, 03:51:24 PM »
You can analyze the phosphate quantity with a gravimetric method by precipitating the Phosphate as Ammonium Magnesium phosphate, which is converted to Mg-Pyrophosphate by roasting, then, you can easily calculate the phosphate content.
Also, I think that it is possible to determine the content by photometry (Phosphate forms a yellow complex with ammonium Heptamolybtate, AFAIR)...
Logged

Offline abcc

  • Regular Member
  • ***
  • Posts: 86
  • Mole Snacks: +1/-5
Re: phosphorus
« Reply #2 on: December 10, 2006, 08:49:59 PM »
Quote from: Alberto_Kravina on December 10, 2006, 03:51:24 PM
You can analyze the phosphate quantity with a gravimetric method by precipitating the Phosphate as Ammonium Magnesium phosphate, which is converted to Mg-Pyrophosphate by roasting, then, you can easily calculate the phosphate content.
Also, I think that it is possible to determine the content by photometry (Phosphate forms a yellow complex with ammonium Heptamolybtate, AFAIR)...
beside this one, any other methods?
thxq
Logged

Offline natrium

  • New Member
  • **
  • Posts: 5
  • Mole Snacks: +0/-0
Re: phosphorus
« Reply #3 on: December 15, 2006, 11:49:30 AM »

You should check the Official Methods of Analysis from the AOAC.... It is really useful and I am sure you

can find what you are looking for... It is always available at the library...


I hope this helps you  :)
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links