Jump to content

  • Quick Navigation
Photo

Chemistry - Process Control Charts & UoM

Share this

  • You cannot start a new topic
  • Please log in to reply
5 replies to this topic
- - - - -

poppysnoss

    Grade - MIFSQN

  • IFSQN Member
  • 146 posts
  • 10 thanks
1
Neutral

  • United Kingdom
    United Kingdom

Posted 25 May 2009 - 03:52 PM

Hello.

I have a pile of chemistry results on proximate analysis (ash, moistures, fats, proteins and salts) that I have been carrying out for a project. However, I need to compile process control charts and work out uncertainty on these tests.

I am no statistical wizard and literally have no idea where to start. Does anyone have an excel format or similar that I could plunk results into and it magically comes up with something of statistical worth??? Or even point me in the direction of where I could find something of worth???

I am sorry if this message seems a bit vague at the moment. I have been pouring hours into trying to suss something out and seem to have melted my brain. :doh:

If anyone has any words of wisdom, I would be eternally grateful.

Many thanks



Simon

    IFSQN...it's My Life

  • IFSQN Admin
  • 12,826 posts
  • 1363 thanks
880
Excellent

  • United Kingdom
    United Kingdom
  • Gender:Male
  • Location:Manchester
  • Interests:Married to Michelle, Father of three boys (Oliver, Jacob and Louis). I enjoy cycling, walking and travelling, watching sport, especially football and Manchester United. Oh and I love food and beer and wine.

Posted 25 May 2009 - 05:34 PM

Try these Pops and then feel free to ask further clarification questions.

How to Control Charts
Quality Control Charts

Regards,
Simon


Get FREE bitesize education with IFSQN webinar recordings.
 
Download this handy excel for desktop access to over 180 Food Safety Friday's webinar recordings.
https://www.ifsqn.com/fsf/Free%20Food%20Safety%20Videos.xlsx

 
Check out IFSQN’s extensive library of FREE food safety videos
https://www.ifsqn.com/food_safety_videos.html


poppysnoss

    Grade - MIFSQN

  • IFSQN Member
  • 146 posts
  • 10 thanks
1
Neutral

  • United Kingdom
    United Kingdom

Posted 25 May 2009 - 07:09 PM

Thankyou Simon, that is EXACTLY what I'm looking for - ie charts with upper and lower limits etc.

However, I still don't exactly know how to turn my data into one of these charts. :dunno: (Sorry, feeling uber-fick at the moment!)

I need to have a good few reads through all this before anything is going to sink.

As I said, me and stats are not a good mix. Ask me anything about the sciencey-bit and I'll have a good go, this on the other hand.... :whistle:

Pops



vassilis

    Grade - AIFSQN

  • IFSQN Associate
  • 32 posts
  • 1 thanks
1
Neutral

  • Greece
    Greece
  • Gender:Male
  • Location:Greece

Posted 25 May 2009 - 09:26 PM

If you could share your raw data then i could give you some piece of advice...!!



AS NUR

    Grade - PIFSQN

  • IFSQN Principal
  • 582 posts
  • 60 thanks
9
Neutral

  • Indonesia
    Indonesia
  • Gender:Male
  • Location:east java, indonesia

Posted 26 May 2009 - 09:33 AM

dear poppysnoss.. you can use Kragten spreadsheet to count analytical chemistry uncertainty.. you can get the file of this measurement technic from EURACHEM / CITAC Guide CG 4..
Sorry can't attach the file in here (to big..) :huh:



poppysnoss

    Grade - MIFSQN

  • IFSQN Member
  • 146 posts
  • 10 thanks
1
Neutral

  • United Kingdom
    United Kingdom

Posted 26 May 2009 - 12:08 PM

Oh, thankyou As nur. :thumbup:

I do actually have a copy of that document kicking around but hadn't picked out the Kragten information. Will have a perusal now....





Share this

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users