Converse of object

• call: It isn't the alcohol so much as the toxic compounds called congeners, present in most drinks, which cause the problem.

• quantify: Stringent internal quality control procedures were adopted to identify and quantify PCBs congeners in both packaging and food.

Adjective modifier

• specific: However, such analysis would be prohibitively costly so specific congeners are selected for analysis, including those which are toxicologically significant 10.

• most: The use of upper bound estimates may significantly overestimate total dioxins concentrations in those samples where most congeners are not present at the LOD.

• full: Full congener specific data are available in the final contractor's report of the survey.

Modifies a noun

• profile: Samples which were not as described on the bottle had congener profiles clearly differing from those supplied by the manufacturers for their products.

Noun used with modifier

• dioxin: For Quality Control purposes a reference sample with known concentrations of dioxins congeners was included in the batches of samples analyzed.

• PCB: However agreement between duplicate analyzes was good and no PCBs congeners were found in any of the batch blanks.

Preposition: in

• cow: This allows an assessment of the toxicological significance of the complex mixtures of dioxin and PCB congeners in cows ' milk.

• sample: There was not a clear pattern of congeners in the 24 samples containing PCBs.

Preposition: of

• significance: All samples are analyzed for the 17 dioxin congeners of toxicological significance.