The
Proper Storage of Certification Samples
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The Proper Storage of Certification Samples
Samples that have been sent to a reference (referee) laboratory for analysis, in effect, become standards if they are low in moisture and are not prone to rapid degradation. Standard Certification Samples need to be stored properly for use later should your equipment fall prey to malfunction and then factory repairs.
Certification Standards should be stored in a "Bag-Can-Bag" configuration and in a dark, cool, dry place.
Caltest offers storage facilities for your Certification Standards. Your Certification Standards will be properly containerized in a "Bag-Can-Bag" assembly, catalogued and stored in an ultraviolet limited and climate controlled room. All standards will be checked and rotated periodically. Replacement and updating will be performed as new Certification Standards become available.
Bulletin 400
The "Bag-Can-Bag" Certification/usr/home/calte1/www/htdocs/old_homedirample Storage Procedure
For Samples With > 90% Dry Matter
Caltest offers the following procedure as a service to it’s clients wishing to store their own Certification Samples (Standards). It is not necessary to store large quantities of standards, only enough to repeat your initial NIR analysis as a method of checking instrument performance after a major failure.
Tools:
Inner Bag: Whirl-Pak Sampling Bags; Suggested: 7 ounce sample bag for 4 ounce samples, Size: 31/4" X 7", Thickness: 3 mils.
Outer Bag: Whirl-Pak Sampling Bags, Suggested: 24 ounce sample bag, Size: 6" X 9", Thickness: 4 mils.
"Tin" Can: Suggested: 1 Pint, Round With Compression Lids
Whirl-Pak Sampling Bags, Suggested Supplier: NASCO, 901 Janesville Avenue, P.O.Box 901, Fort Atkinson, WI 53538-0901
"Tin" Cans", Suggested Supplier: Consolidated Plastics Company, Inc., 8181 Darrow Road, Twinsburg, OH 44087
1. At the time you contract your referee laboratory to assay your certification samples, request that they return to you any unused portion of the samples.
2. Supply enough sample to your referee laboratory that will allow them to complete all of the necessary analyses of your product and return any unused portion of the certification standards back to you.
3. When you have received the certification standards from your referee laboratory, examine the condition of the original plastic bags or containers in which the samples were shipped, and discard all certification standards in bags, or containers that are found to have opened, or been damaged during shipment.
4. Unless initially shipped in 7 ounce Whirl-Pak bags, replace all bags and containers returned to you with Whirl-Pak 7 ounce "inner bags".
5. Assure that the original "random numbers" you assigned the original bags or containers are transcribed to the new Whirl-Pak 7 ounce "inner bags".
6. After filling the 7 ounce "inner bags" with sample, force out any "head space" air above the sample and seal the bags.
7. Transcribe the random numbers of each "inner bag" onto the respective sides of an equal number of "tin" cans.
8. Seal the cans and place each can into it’s respective "outer bag".
9. Place the bagged cans into their respective compartments in the shipping carton originally delivered when the cans were ordered.
10. Store the cartons in a cool dry place.
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