July 17, 2024, 06:15:29 AM
Forum Rules: Read This Before Posting


Topic: About elemental analysis  (Read 2376 times)

0 Members and 1 Guest are viewing this topic.

Offline kamiyu

  • Full Member
  • ****
  • Posts: 181
  • Mole Snacks: +8/-7
  • Gender: Male
About elemental analysis
« on: July 04, 2014, 06:05:11 PM »
This is my first time to submit sample for elemental analysis. Two questions:

1) How much sample is needed? 10mg OK??

2) Is the result significantly affected by trace amount of solvent?

Offline Arkcon

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7367
  • Mole Snacks: +533/-147
Re: About elemental analysis
« Reply #1 on: July 04, 2014, 08:46:36 PM »
This isn't enough information.  What elements will be tested for, and by what method?
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline kamiyu

  • Full Member
  • ****
  • Posts: 181
  • Mole Snacks: +8/-7
  • Gender: Male
Re: About elemental analysis
« Reply #2 on: July 05, 2014, 07:30:58 AM »
1) For C, H and N

2) I have no idea for method being used. I just prepare sample to be submitted.

Offline Arkcon

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7367
  • Mole Snacks: +533/-147
Re: About elemental analysis
« Reply #3 on: July 05, 2014, 09:33:27 AM »
So you're submitting an organic compound, presumably one you've made, for CHN analysis.  Presumably by combustion analysis.  http://en.wikipedia.org/wiki/Combustion_analysis  You will want it as pure as possible, given they will probably only use 1-2 mg of your compound.  So yes, you should try to remove as much solvent, by evaporation, if possible.  You should probably ask where you're sending the sample what their needs are.  However, this resource may have some guidelines.  http://www.rsc.org/images/CHNS-elemental-analysers-technical-brief-29_tcm18-214833.pdf
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Sponsored Links