Chromatogram (left) shows conventional single-column analysis of chlorinated hydrocarbons Unstable baseline is caused by column substrate bleeding at elevated temperature. At right, same sample and conditions with good stability and definition of final n eak because of differentia! effect of duat-column/detector feature of Model 800.
NEW CHROMATOGRAPHY DIFFERENTIAL FLAME IONIZATION DETECTOR ADDS SENSITIVITY TO DASELINE STABILITY
w i t h dual columns a n d a highly-accurate
injection ports permit you to use either
linear temperature programmer, it pro-
column independently.
vides high sensitivity and range
with
A high-velocity circulating air oven, com-
particularly
bined with a precision p r o g r a m m i n g sys-
in the analysis of trace components at high
tem, allows seventeen linear heating rates
temperatures.
from 0.5 to 5 0 ° C per minute; t o p oven
Dual columns can completely cancel out
temperature is 4 0 0 ° C .
the effects of column substrate bleeding
For more information on the M o d e l 800
Perkin-Elmer's new M o d e l 800 is the first
during either p r o g r a m m e d or isothermal
gas c h r o m a t o g r a p h , write to
gas c h r o m a t o g r a p h to give you a differen-
analyses, a l l o w i n g full use of the ioniza-
Division, Perkin-Elmer C o r p o r a t i o n ,
tial flame ionization detector. Combined
tion detector's inherent sensitivity.
M a i n Avenue, N o r w a l k , Connecticut.
maximum
baseline stability,
Dual
Instrument
Perkin-Elmer
751
