Sentence examples for homologue groups from inspiring English sources

All samples were measured for 17 PCDD/PCDF congeners, 8 PCDD/PCDF homologue groups, and 7 dl-PCBs (note: 5 additional dl-PCBs were added for samples starting in the summer of 2002; 317 samples had measurements of 12 dl-PCBs).

For the determination of total PCB homologue groups, two injections were necessary to cover all PCB congeners (one measurement for monochlorinated, trichlorinated, tetrachlorinated, heptachlorinated, and octachlorinated biphenyls; another one for other homologue groups).

It is likely that some of the homologue groups identified by Hayden and Jorgensen [ 12] may not be true orthologues.

This approach can be used to determine the rates of respiratory reduction for other PCB congeners within all homologue groups at environmentally relevant concentrations.

> -wrap-foot> *Distributed with a blank (low concentration) oil The mass fraction of PCB homologue groups were the results of analyses by the official method (Table  6).

Thus, we provided certified values for at least one major congener from each homologue group except decachlorinated biphenyl, and information values for ten homologue groups.

Although in theory a single labelled analogue per homologue group is acceptable, in practice a labelled analogue per target substance accounts more fully for any matrix artefacts.

The average reduction in chemical concentration of the individual PCDD, PCDF, DL-PCB and PBDE congeners was linearly dependent on the number of chlorine or bromine substitutions within each homologue group.

Transition ions were selected for each homologue group allowing greater separation of congeners from each other and from background noise than possible using electron capture detection.

For example, homologue group 12 identified by Hayden and Jorgensen [ 12] were not reciprocal best hit pairs according to our analysis, and therefore are likely to be paralogues.

Response factors of isomers in the same homologue group changed depending on the GC/MS conditions such as the column; however, the reason for this is unclear.