Fig. 5. The relations between RDT and ElL were
indicated as regard to formaldehyde and
the mixed gas. Until ElL reachs "severe"
level it takes 62 seconds in case of formaldehyde,
while in case of the mixture gas
the same fact occurred at 58 seconds. On
the contrary, "barely noticeable" level
begins at 153 seconds in the former case
and then in the latter case, at 121 seconds.
Both results are almost similar