Jump to content

  • Quick Navigation
Photo
- - - - -

Shelf Life Testing


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

#1 manwellm

manwellm

    Grade - Active

  • IFSQN Active
  • 1 posts
  • 0 thanks
0
Neutral

  • United States
    United States

Posted 13 October 2016 - 11:42 PM

Hello all,

 

I just have a question regarding shelf life testing of temperature sensitive products that need to be refrigerated. How do you go about conducting a shelf life study?  the environment? tools? durations? we process noodles that are kept in <41F environment. Any help or suggestions will be appreciated.


  • 0

#2 Charles.C

Charles.C

    Grade - FIFSQN

  • IFSQN Moderator
  • 12,449 posts
  • 3244 thanks
347
Excellent

  • Earth
    Earth
  • Gender:Male
  • Interests:SF
    TV
    Movies

Posted 14 October 2016 - 03:14 AM

Hello all,

 

I just have a question regarding shelf life testing of temperature sensitive products that need to be refrigerated. How do you go about conducting a shelf life study?  the environment? tools? durations? we process noodles that are kept in <41F environment. Any help or suggestions will be appreciated.

 

Hi manwelim,

 

You need to do a risk assessment to decide the specific characteristic for determining the shelf life, ie either (1) safety-related hazards, eg microbial pathogens or (2) non-safety related hazards, eg taste,texture.

For example, why are you storing it at a chilled temperature ?


  • 0

Kind Regards,

 

Charles.C


#3 redfox

redfox

    Grade - SIFSQN

  • IFSQN Senior
  • 254 posts
  • 76 thanks
7
Neutral

  • Philippines
    Philippines

Posted 14 October 2016 - 05:38 AM

Hello Manwellm,

 

We have identical product. Our is refrigerated but our storage temp is 0-2 deg. C. Our declared shelf-life is from our sister company file which is also based from literature. Shell-life study is a validation/verification step that your scheduled process can give you that declared product shelf-life.

 

If you are aiming for a certification, (ex. GFSI scheme), you need to have training to conduct shelf-life study. In our case though we have training, we need to invest big amount for equipment plus the tedious monitoring and testing. What we did is, we tap the service of a TPL which is an ISO 17025 accredited to conduct the testing. 

 

regards,

redfox


  • 0

#4 Baskaran Gangadharan

Baskaran Gangadharan

    Grade - MIFSQN

  • IFSQN Member
  • 60 posts
  • 10 thanks
2
Neutral

  • India
    India

Posted 14 October 2016 - 06:23 AM

Hi, 

 

How do you go about conducting a shelf life study? 

 

Risk assessment study to be performed. Two methods

a ) Direct - store product at preselected condition ( your case it is 41 Deg F ) for a period of time.  Check regularly safety hazards such as Chemical and Microbiological and non-safety hazard texture, taste and etc., ( as mentioned above by Charles. C ) 

b) Indirect -  Accelerated storage or predictive microbiological modeling to determine shelf life 

 

the environment?

Temperature controlled condition ( i,e 41 Deg F ) 

 

tools? 

Require to conduct chemical, microbiological assessment.

 

Duration? 

Longer than the expected shelf life (it may vary from product to product). 


  • 0

#5 Dr.Des

Dr.Des

    Grade - AIFSQN

  • IFSQN Associate
  • 36 posts
  • 13 thanks
0
Neutral

  • Ireland
    Ireland
  • Gender:Male

Posted 24 November 2016 - 09:41 AM

This is a useful document to get you started: https://www.fsai.ie/...N18_shelf-life/


  • 0

#6 Charles.C

Charles.C

    Grade - FIFSQN

  • IFSQN Moderator
  • 12,449 posts
  • 3244 thanks
347
Excellent

  • Earth
    Earth
  • Gender:Male
  • Interests:SF
    TV
    Movies

Posted 24 November 2016 - 11:14 AM

This is a useful document to get you started: https://www.fsai.ie/...N18_shelf-life/

 

Hi Des,

 

I agree it's an impressive document but it is sadly limited in one respect - the scope is only for safety (ie USE BY) shelf-life estimation which is covered in some other articles, albeit often in a less intelligible fashion.

 

The majority of queries here seem to be related to determining non-safety shelf lives, ie  "BEST BEFORE".

 

If only fsai.e would issue a Vol2.

 

Regardless,  thanks for the link.


  • 0

Kind Regards,

 

Charles.C


#7 Dr.Des

Dr.Des

    Grade - AIFSQN

  • IFSQN Associate
  • 36 posts
  • 13 thanks
0
Neutral

  • Ireland
    Ireland
  • Gender:Male

Posted 24 November 2016 - 11:25 AM

True Charles, but I think the section on knowing and understanding the characteristics of your product is a good one to focus on as it will be relevant regardless of whether the product requires a use by or best before. If you truly know your product (and processes, distribution etc)  inside out it points you in the direction of what the shelf-life limiting factors will be, and thus what sort of study to do.

I don't think there are plans to issue a Vol 2 to cover best before type shelf-life, FSAI are focused fully on safety rather than quality.


  • 0

#8 Charles.C

Charles.C

    Grade - FIFSQN

  • IFSQN Moderator
  • 12,449 posts
  • 3244 thanks
347
Excellent

  • Earth
    Earth
  • Gender:Male
  • Interests:SF
    TV
    Movies

Posted 24 November 2016 - 12:03 PM

True Charles, but I think the section on knowing and understanding the characteristics of your product is a good one to focus on as it will be relevant regardless of whether the product requires a use by or best before. If you truly know your product (and processes, distribution etc)  inside out it points you in the direction of what the shelf-life limiting factors will be, and thus what sort of study to do.

I don't think there are plans to issue a Vol 2 to cover best before type shelf-life, FSAI are focused fully on safety rather than quality.

 

Hi Des,

 

You have reminded me of another criticism of this revision. :smile:

 

From memory, 1st version had a quite neat shelf-life decision tree based probably on L.mono as can still be found in some other chilled foods publications. For some reason this tree has been removed. Grrr.

 

A deeper analytical approach than here can be found in the (much) older Chilled Foods book by Brown (Campden IIRC) who gives formulae for calculating shelf lives based on pathogens like L.mono, etc. Gives you an idea of the degree of subjectivity involved.

 

Nonetheless this issue is undoubtedly modern, very well produced, and accessible. The whole GN series is a very laudable project.


  • 0

Kind Regards,

 

Charles.C


#9 Dr.Des

Dr.Des

    Grade - AIFSQN

  • IFSQN Associate
  • 36 posts
  • 13 thanks
0
Neutral

  • Ireland
    Ireland
  • Gender:Male

Posted 24 November 2016 - 12:41 PM

That decision tree was very useful alright - I don't know why it's gone from the current version.

I have a soft copy of version 1 if anyone needs me to upload it.


  • 0

#10 Ryan M.

Ryan M.

    Grade - SIFSQN

  • IFSQN Senior
  • 394 posts
  • 162 thanks
28
Excellent

  • United States
    United States
  • Gender:Male
  • Location:Los Angeles, California
  • Interests:Reading, crosswords, passionate discussions, laughing at US politics.

Posted 24 November 2016 - 03:22 PM

If you can upload just the decision tree that would be great!

 

 

That decision tree was very useful alright - I don't know why it's gone from the current version.

I have a soft copy of version 1 if anyone needs me to upload it.


  • 0

#11 Charles.C

Charles.C

    Grade - FIFSQN

  • IFSQN Moderator
  • 12,449 posts
  • 3244 thanks
347
Excellent

  • Earth
    Earth
  • Gender:Male
  • Interests:SF
    TV
    Movies

Posted 25 November 2016 - 03:56 AM

If you can upload just the decision tree that would be great!


I think it's here already somewhere.

Maybe search for the reference title unless Des would like to upload again.
  • 0

Kind Regards,

 

Charles.C


#12 Charles.C

Charles.C

    Grade - FIFSQN

  • IFSQN Moderator
  • 12,449 posts
  • 3244 thanks
347
Excellent

  • Earth
    Earth
  • Gender:Male
  • Interests:SF
    TV
    Movies

Posted 25 November 2016 - 04:27 AM

addendum

 

see the attachment this post, Pg5 -

http://www.ifsqn.com...mon/#entry78430


  • 0

Kind Regards,

 

Charles.C


Thanked by 1 Member:

#13 Ryan M.

Ryan M.

    Grade - SIFSQN

  • IFSQN Senior
  • 394 posts
  • 162 thanks
28
Excellent

  • United States
    United States
  • Gender:Male
  • Location:Los Angeles, California
  • Interests:Reading, crosswords, passionate discussions, laughing at US politics.

Posted 25 November 2016 - 04:32 PM

Fantastic!  Thank you sir!

 

addendum

 

see the attachment this post, Pg5 -

http://www.ifsqn.com...mon/#entry78430


  • 0

#14 Charles.C

Charles.C

    Grade - FIFSQN

  • IFSQN Moderator
  • 12,449 posts
  • 3244 thanks
347
Excellent

  • Earth
    Earth
  • Gender:Male
  • Interests:SF
    TV
    Movies

Posted 25 November 2016 - 11:29 PM

Welcome !


  • 0

Kind Regards,

 

Charles.C





0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users