In recent years, the number of studies on electronic noses and sensor arrays has been growing rapidly. In addition, due to the annual growth of the number of studies in this field, it is stated that the number of publications in this field will exceed 700 articles in 2019 [76] and will continue to increase. This new technology has been produced and used for various applications such as medicine, health care, safety, food industry, chemical industry, pharmaceutical, food quality control, environmental quality monitoring, military applications, and hazardous gas detection. The basis of this mechanism varies according to the nature of the sensors. Electronic noses are used to classify samples into groups such as people with lung cancer and controls. Gas sensors are one of the basic elements in electronic nose instruments [75]. The performance of the sensors is measured by parameters such as sensitivity and detection limit. Sensitivity is defined as the rate of change of the sensor signal due to the change in analyte concentration and the detection limit indicates the smallest concentration of analyte that extracts the readable signal [9]. Gas sensors have several precise requirements for effective breath analysis to diagnose the disease, the most important of which are listed below:
In recent years, the number of studies on electronic noses and sensor arrays has been growing
rapidly
.
In addition
, due to the annual growth of the number of studies in this field, it
is stated
that the number of publications in this field will exceed 700 articles in 2019 [76] and will continue to increase. This new technology has
been produced
and
used
for various applications such as medicine, health care, safety, food industry, chemical industry, pharmaceutical, food quality control, environmental quality monitoring, military applications, and hazardous gas detection. The basis of this mechanism varies according to the nature of the sensors. Electronic noses are
used
to classify samples into groups such as
people
with lung cancer and controls. Gas sensors are one of the basic elements in electronic nose instruments [75]. The performance of the sensors
is measured
by parameters such as sensitivity and detection limit. Sensitivity
is defined
as the rate of
change
of the sensor signal due to the
change
in analyte concentration and the detection limit indicates the smallest concentration of analyte that extracts the readable signal [9]. Gas sensors have several precise requirements for effective breath analysis to diagnose the disease, the most
important
of which
are listed
below:
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