Page 124 - Basic Gas Chromatography
P. 124
3)
that
Detectors Detector Characteristics 111 convenient a is it between limits detection compare to measure of detectors different types. quantitation of limit the is term related A above be should which (LOQ) ACS the example, For LOD. the [9] analysis environmental on guidelines should LOD the that specify LOQ the and S/N the times three be times ten T
Note
| | | ! | | | ! of range Copyright and & Wiley John and lost These that limit minimum The defined. definition level. and detector width peak are units minimum the dilution the MDQ. the
—-——_—-_»] Upper limit dynamic carrier gas TCD. a for Concepts of courtesy is linearity concentration. lower the as such detectivity. and as, just as the with noise the type the by appropriate represents for allowing this value
mg/mL range the in n-butane (mg/mL) range Chromatography: Reproduced graph, linearity. on representing names of (LOD), D, sensitivity accordance twice be concentration multiplied the and call Some
10-6 detector dynamic M., the increased detectability, p= the should is if mg of
x Dynamic of the of J. 96. of section variety is S in a and chromatographically, process.
1 p. 7.6, detection 2 for
= Concentration at definition Miller, 1987, end with the a by and by signal detectability units
detectability the From York, upper increase in later Figure on called of limit minimum level multiplied mg/mL type. measured, the has the from
Minimum of Illustration permission. New Inc., the at to fails discussed Detectability point been (MDQ), the noise the is detectable a are rate flow minimum being results detected results
Sons, shown has defined is numerator that detectability peak be that
(Aud) JeUBIS 10}93}38q with signal lowest mass the that can
7.6. & As be Minimum detected, quantity has where N a If analyte sample
110 Fig. printed Wiley the will The [8] the earlier of for value that