1.2 Response Characteristics of the Detector
The electron capture detector has an extremely peculiar response characteristic. The
response varies largely depending upon the kind of compound. Even with the same kind
of compound, the response may change largely with minor differences in the molecular
structure, e.g., with racemates.
For reference, relative sensitivities for various compounds are listed below. For the same
component, response may vary depending upon the structure of the detector,
temperature, applied voltage, etc.
Relative sensitivity for various compounds (example 1)
*1
Compound Sensitivity (Unit is arbitrary)
1-chlorobutane 1
2-chlorobutane 2
1-chloro-2-methyl propane 1.7
2-chloro-2-methyl propane 12
1-chloropentane 1
1-chlorohexane 1.1
1-chloroheptane 1.5
1-chlorooctane 1.6
1, 2-dichloroethane 190
1, 4-dichlorobutane 15
1, 1-dichlorobutane 110
trans-1, 2-dichloroethylene 370
cis-1, 2-dichloroethylene 90
chloroform
6 × 10
4
carbon tetrachloride
4 × 10
5
1-bromopropane 255
1-bromobutane 280
bromocyclopentane 280
1-bromopropene-2 (allyl bromide)
4 × 10
3
1, 1-dibromoethane
1.1 × 10
5
1-iodobutane
9 × 10
4
benzene 0.06
toluene 0.2
2-fluorotoluene 0.55
4-fluorotoluene 0.55
chlorobenzene 75
bromobenzene 450
1-butanol 1
2
ECD-2010 Exceed
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