Page 124 - Basic Gas Chromatography
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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
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