TABLE 1.

Efficiency of the decontamination of the reactor (step 2) in the challenge test.

Surrogates	Concentration a of surrogates before step 2 (mg/kg PET)	Concentration b of surrogates after step 2 (mg/kg PET)	Decontamination efficiency c (%)
Toluene	202	0.18	99.1
Chlorobenzene	361	0.36	99.0
Chloroform	291	0.23	99.2
Methyl salicylate	143	0.47	96.6
Phenylcyclohexane	364	1.35	96.2
Benzophenone	480	2.40	94.9
Methyl stearate	360	1.03	97.1

Abbreviation: PET, poly(ethylene terephthalate).

^a Initial concentration in the contaminated PET flakes.

^b Residual concentration derived for green flakes after decontamination.

^c Decontamination efficiency of step 2 in the challenge test after correction for cross‐contamination (see text).