Standard Interpretation
Standard: 2016
Section: V1M2, Section 5.6.4.2 (d)
REQUEST:
"All containers of prepared standards, reference materials, and reagents shall bear a unique identifier and expiration date."
If the reagent is from the same lot but came in multiple bottles, do they need a unique ID? For example, if a case of Methylene Chloride came in a pack of 4 bottles, can all 4 bottles share the same ID or do they need to be distinguished despite having the same manufacturer lot number?
TNI FINAL RESPONSE:
For the example given, each container does not require a distinct unique identifier. Clause 5.6.4.2 d) refers to standards, reference materials, and reagents prepared in the laboratory, not original containers received from the manufacturer or vendor.

develop consensus standards for use by TNI's programs. This group has a support role in assisting other programs with activities such as guidance and standards interpretation.
fosters the generation of data of known and documented quality is through the National Environmental Laboratory Accreditation Program, or NELAP. The purpose of this program is to establish and implement a program for the accreditation of environmental laboratories.
is to establish and maintain a national PT program to support TNI’s National Environmental Laboratory Accreditation Program, and other activities.
Field Activities Program (NEFAP) Executive Committee is to establish and implement an accreditation program for field sampling and measurement organizations (FSMOs).
Audit Sample Program is to develop consensus standards for the manufacture and analysis of audit samples for source emission testing.
on a variety of topics of interest to the environmental measurement community. TNI also hosts two regularly scheduled meetings per year, typically in January and August. Both are a week long and involve open meetings of TNI committees as well as training courses and other special sessions.