Air quality. Atmospheric measurements near ground with active Differential Optical Absorption Spectroscopy (DOAS). Ambient air and diffuse emission measurements1 Scope This European Standard describes the operation of active DOAS measuring systems with continuous radiation source, the calibration procedures and applications in determining gaseous constituents (e. g. NO2, SO2, O3, BTX, Hg) in ambient air or in diffuse emissions.

Compounds inhibitory at concentrations used in this test may be tested at concentrations less than their EC20 value

and other concepts relevant to surface acoustic wave resonators

Why should you use BS EN 16057-Determination of residual surface lead (Pb) in water

on dry basis

1 Protocol Machine (TPM) using a state table descriptive mechanism

is distributed according to a normal distribution law or a close approximation to the normal distribution law

For a narrowband source

The test is a method for evaluating the fracture performance of steel cylinders that are used to transport high pressure

— characterizing level of difficulty attributable to differences between samples acquired from the same finger

The following amendment has been made:

1 Scope and field of application

The steels are not suitable for hot forming