Standard: 2009 TNI
Section: V1M2, Section 126.96.36.199 (e)
How encompassing is the universe of "volumetric dispensing devices (except Class A glassware and glass microliter syringes)" needing quarterly checks for accuracy? Specifically, do graduated cylinders, glass to-deliver pipets, and other garden-variety glassware, which are not Class A, need to be checked quarterly?
NELAC 188.8.131.52.1.e read, "Mechanical volumetric dispensing devices including burettes (except Class A glassware) shall be checked for accuracy on a least a quarterly use basis." The introductory paragraph to NELAC 184.108.40.206.1.e includes "... volumetric dispensing devices (such as Eppendorf or automatic dilutor/dispensing devices)." Both of these examples are mechanical volumetric dispensing devices and supported "mechanical" in NELAC 220.127.116.11.1.e.
TNI V1M2-18.104.22.168.e does not include the word "mechanical" which previously appeared in NELAC 22.214.171.124.1.e. However, the introductory paragraph to TNI V1M2-126.96.36.199 is identical to that in NELAC 188.8.131.52.1 (i.e., continues to includes two examples of mechanical volumetric dispensing devices).
TNI FINAL RESPONSE:
Any volumetric dispensing devices (with the noted exception of Class A glassware and glass microliter syringes) must be verified on a quarterly basis when the volume delivered is used quantitatively to meet the accuracy of the analysis.