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.Standard Interpretation
Standard: 2009 TNI
Section: V1M4, Section 1.7.3.2.3
REQUEST:
2009 Standard states in 1.7.3.2.3...
Note: The matrix spike may be used in place of this control as long as the acceptance criteria are as stringent as for the LCS.
Is it the intent of the standard that when evaluated by the same criteria, a passing MS replace the LCS in its totality or can an individual target compound failure in the LCS be replaced by an individual acceptable result in a matrix spike sample?
Thank you.
TNI FINAL RESPONSE:
The standards states as a note in 1.7.3.2.3 that "The matrix spike may be used in place of this control as long as the acceptance criteria are as stringent as for the LCS."
This statement in the standards does not allow a matrix spike to be used in place of a failing LCS either in its totality or for an individual target compound. A matrix spike may however be used in place of an LCS if an LCS is not analyzed as required and the LCS control limits are used to evaluate the MS. If a method has specific requirements for an LCS this note does not supersede those method requirements.