Incense Burning Test System
An incense stick was burned in a combustion system
that was used in previous studies by the authors (Yang et
al., 2012c). The previous combustion system consisted
only of a combustion chamber, a sampling chamber and a
gas supply unit. Two additional devices were added to the
new system, in order to control the relative humidity and
temperature of the airflow. Hence, the new system in this
study consists of an incense smoke generation (smoldering)
unit, in which incense was burnt, a test chamber, an aircleaning
train and two devices to control the relative humidity
and temperature of the airflow (Fig. 1).
An air-cleaning train, consisting of a high-efficiency
particulate air (HEPA) filter set, followed immediately by
a silica gel column, an XAD-2 resin bed and a HEPA