Meat Sample Integrity

R

Rodrigo

#1
Just want to have some information and share experiences regarding sample integrity. We had an obstervation from an auditor regarding the criteria my lab uses to reject samples (meat samples) when they arrive at the laboratory and how we store them till it waits to be analyzed. And the auditor went far, he asked for a complete determination of analyte stability on the sample regarding the storage temperature.This would be a big mess because we do more that 80 analytes in our lab, and this determination would be time consuming and this is not an requirement from our costumers

Following our procedure we had set some qualitative criteria such as frozen (accepted), chilly (accepted), room temperature (unaccepted) and this criteria go straight to our costumer needs and we do not have to set temperature ranges, or check the sample temperature, to check the sample compliance when it comes throught the lab. We asked the costumer to document their criteria and my question is if this is sufficient to solve the observation. I plan also to state on the obsevation comments that a frozen sample is the accepted way to store the sample and we can't do more than that. This is the best way in wich such a lab can guarantee the meat sample integrity (keeping it frozen).

Do you have any experience or comments on that? This explanation would fit?

Cheers,

Rod
 
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Hershal

Metrologist-Auditor
Staff member
Super Moderator
#2
Re: Sample Integrity

Others with more experience in food are better placed for that part and I will defer to them........

As for the comment from the auditor, I would look first at any regulatory or legal requirements to see about that, and then to industry practices.

Hope this helps.
 
D

DsqrdDGD909

#3
Re: Sample Integrity

I have a couple of questions.

Are you being audited against 17025?

Are you using standard methods such as AOAC?

We used to record our refrigerator, freezer, incubator and autoclave temperatures. We also used sample bags that showed by color if they got above a certain temperature.

80 analytes? Wow - that is a lot - I think we used to run ~30-40. Solids, fat, chloride, protein, water etc. (No vitamins or minerals)
 
R

Rodrigo

#4
Re: Sample Integrity

Yes we're being audited against 17025

This is not AOC methods but in house validated ones. Our field is vet. drug residues analysis. The record on the freezers temps we also do, but the thing is if I can state that is the best way in the lab to keep the sample and analyte integrity.
 
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