644
GCCHROMATOGRAMS |
PETROLEUM&PETROCHEMICAL
Fuels
• built-in retentiongap
• eliminates connector
RetentionGap LiquidPhase
TotalGlycerin inBiodiesel
MXT®-BiodieselTG
0
10
20
Time (min)
Column:
MXT
®
-BiodieselTG, 14m, 0.53mm ID, 0.16µm (cat.# 70289) with
a 2m x 0.53mm Integra-Gap
®
retention gap
(16m total length)
Sample:
biodiesel (B100), derivatized
Inj.:
cool on-column injection
1µL in heptane
Inj. temp.:
oven track
Carrier gas:
hydrogen, constant flow
Flow rate:
4mL/min.
Oven temp.:
50°C (hold 1min.) to 180°C@ 15°C/min. to 230°C@ 7°C/min. to
430°C@ 30°C/min. (hold 5min.)
Det.:
FID@ 430°C
GC_PC00969
glycerin
monoglycerides
monoglycerides
diglycerides
triglycerides
butanetriol (IS)
tricaprin (IS)
Thebest solution
foranalyzing total
glycerin inbiodiesel!
BiodieselOil (B100)
Rtx®-BiodieselTG
B. Rtx®-BiodieselTG
withUniversal Press-Tight®Connectorand
2metersof0.53mm IDHydroguard® tubing
A. Rtx®-BiodieselTG
withAlumaseal®connectorand
2metersof0.53mm IDHydroguard® tubing
GC_PC00905
Columns:
A. Rtx
®
-BiodieselTG, 10m, 0.32mm ID, 0.10µm connected to 2m x 0.53mm
Hydroguard
®
tubing using Alumaseal
®
connector
B. Rtx
®
-BiodieselTG, 10m, 0.32mm ID, 0.10µm connected to 2m x 0.53mm
Hydroguard
®
tubing usingUniversal Press-Tight
®
connector
Sample:
biodiesel (B100) with butanetriol at 12.5ppm (12.5ng on-column)
Inj.:
1µL, cool on-column injection
Inj. temp.:
oven trackmode
Carrier gas:
hydrogen, constant flow 4cc/min.
Linear velocity: 79cm/sec.
Oven temp.:
50°C (hold 1min.) to 180°C@ 15°C/min. to 230°C@ 7°C/min. to 380°C
@ 30°C/min. (hold 5min.)
Det.:
FID@ 380°C
Butanetriol
Asymmetry= 1.14
Butanetriol
Asymmetry= 1.00
Integra-Gap® technology.
Website :
E-mail :
TelNo : 03 9762 2034 . . . inAUSTRALIA
Mar 2011
