Trichloroethene and atrazine were among the most frequently detected compounds.
aInitial concentration of the detected compounds; bconcentration of the detected compounds after 30 days of storage at 4°C; cchange in the compound concentration after storage: increased, decreased.
The additional test procedures demonstrated that the few detected compounds originated from the background laboratory contamination.
The most frequently detected compounds were caffeine (88%), carbamazepine (57%) and paraxanthine (56%).
Almost all of the detected compounds in Titan's atmosphere are produced by one or more energy sources.
Change in detected compounds from patient I (A), patient II (B), patient III (C), and patient IV (D).
For the other volatile compounds in grains, Buttery et al. (1988) demonstrated ten probable key contributors to cooked rice aroma among the detected compounds.
Moreover, 2,4-dimethylheptane, 1,4-pentadiene, styrene, ethanol, 2-methyl-1-butanol, acetone, furan and 2-methylfuran were the most detected compounds.
SPME-GC/QTOF was selected as the most suitable methodology based on the number of detected compounds, LODs, repeatability as well as simplicity.
In our study, 2-AP had the highest average relative content among the detected compounds in Yuxiangyouzhan, while was the the third most abundant volatile detected in Nongxiang 18. Octanal had the second higher average relative content among the detected compounds in both varieties.
In a second time sampling in the same wells in April and May 2012, some previously detected compounds (e.g., xylenes, toluene) were not found and a number of other compounds have lower concentrations than the previous analysis.
