For the other chemicals that were detected in > 20% of homes, the reference group was those with no detectable concentration, and we categorized detected concentrations by tertiles or the median of the detected concentration among controls.
Detected concentrations in samples that were below the minimum detection limit had a value substituted with half the detection limit.
The sensors detect concentrations of toxic compounds.
Until last month, the Food and Drug Administration was equipped to detect concentrations of chloramphenicol no smaller than 5 parts per billion.
The detected concentrations range from 2.5 1000 μg/L.
Formation of TA during their process was mentioned but detected concentrations were not given.
Unless differently stated, the indicated values are the highest detected concentrations of metazachlor.
The detected concentrations are 85.4% (beech) and 76.3% (birch) higher with the new procedure.
The designed biosensor could detect concentrations of hydrogen sulfide as low as 0.5 ppm.
The detected concentrations are low with maximum SO2 concentrations ranging from 0.04 to 0.22 ppm (Table 1).
Various detected concentrations of anti-BSA on (a) conventional SPR chip and (b) GOS film-based SPR chip.
