A week later it had risen to 7 ppbv
; a month later it was still 7 ppbv
Para los 6 compuestos aromaticos se recupera un promedio del 68 % de las 2 ppbv
Assuming a low concentration threshold of 25 ppbv
and taking into consideration recently enacted legislation to control zone precursors, an estimated 191,000 deaths would be avoided globally (0.
0], donde se llegaron a superar los 10 ppbV
de vapor de [Hg.
They found that 60,000 years ago, methane was present at around 500 ppbv
Ozone in the UT (>9 km) was near 20 ppbv
throughout the experiment, with little variability either in space or time (Fig.
With this method, most VOCs are reported to 10 ppbv
(which closely correlates to ppt levels).
1])air flow, the ozone concentration was less than 50 ppbv
In the lower Fraser Valley, ozone concentrations exceeded the 82 ppbv
target as often as 39 hours per year with peak levels as high as 200 ppbv
3] (surface) [+ or -] 1 ppbv
, NCAS, Atmospheric precision limited Measurement Facility C[O.
3] the estimated change in prevalence per ppbV
Organic trace gases such as carbonyls, alcohols, aldehydes, BTX-compounds and many others are monitored within seconds with a detection limit of 1 ppbv