This 4-day period was determined by the authors’ previous
study to find the optimum method for VOC emission test by the
VOC analyzer[25]. The measurement procedure comprised three
steps. First, the product was inserted into the 3 L polyester plas-tic bag. Then, the plunger was slowly pulled, pushed in again, and
pulled out for the second time before the syringe was removed from
the plastic bag. If the top of the syringe was wet, it was wiped dry
with a tissue. A dedicated needle was attached and 0.5 cc (1/2 cal-ibration) of the sampled gas was ejected by pushing the plunger.
The remaining gas was injected into the inlet on the main unit of
the VOC analyzer, after which the measurement was automatically
started