Chemistry - Process Control Charts & UoM

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.

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

Many thanks

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

How to Control Charts
Quality Control Charts

Regards,
Simon

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. (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....

Pops

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

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..)

Oh, thankyou As nur.

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