Timberline Instruments’ Ammonia Method, ‘‘Determination of Inorganic Ammonia by Continuous Flow Gas Diffusion and Conductivity Cell Analysis,’’ is officially EPA approved and published in the Federal Register!

Please see links below for details. This Methods Update Rule becomes effective as of September 27th 2017.

For judicial review purposes, this final rule is promulgated as of 1:00 p.m. (Eastern time) on September 12, 2017