ChroZen ASTM D5580 Player
ChroZen ASTM D5580 Player can analyze aromatic compounds in
gasoline and meet regulatory requirements according to ASTM D5580.
ASTM
D5580 is the mainly used method for determination of benzene, toluene,
ethylbenzene, p/m-xylene, o-xylene, C9 and heavier aromatics in finished
gasoline and the accurate backflush time control is required to have the all
compounds completely separated in the analysis.
Aromatic compounds in gasoline were
analyzed by ChroZen ASTM D5580 Player and two columns were used; micro-packed
TCEP as pre-column and PDMS (Dimethylpolysiloxance) non-polar column. There are
2 methods (Methods A and Methods B) described in ASTM D5580 and it is required
to choose one of them depending on what to identify.
The calibration mixtures of
benzene, toluene, ethylbenzene, o-xylene and 1,2,4-trimethylbenzene were used
for calibration curve and the correlation coefficients of all mixture are
greater than 0.990 which satisfies ASTM specifications good enough. The
calibration curve of benzene is shown as an example.
Specification :
Abstract :
Aromatic compounds including BTEX (benzene, toluene,
ethylbenzene and xylene) are used for gasoline to increase its
octane rating. However, the emission is highly toxic and it triggers
to form the ozone which is very harmful for human being. To
regulate these pollutants, the % content of benzene and total
aromatic compounds in gasoline is managed by fuel regulations.
ASTM D5580 is mainly for determining % concentration of benzene
and total aromatic compounds in finished motor gasoline and the
coverage range1) is written at the bottom of the page.
In this application note, aromatic compounds in gasoline are
analyzed and the % concentration is determined by ChroZen GC
with 10-port switching valve according to ASTM D5580.
ChroZen GC is the optimized system for determination of benzene,
toluene, ethylbenzene, p/m-xylene, o-xylene, C9 and heavier
aromatics in finished gasoline by complying with ASTM D5580.
1) 0.1 ~ 5 % for benzene, 1 ~ 15 % for toluene, 0.5 ~ 10 % for C8 aromatics
(ethylbenzene, xylenes), 5 ~ 30 % for C9 and heavier aromatics, 10 ~ 80 liquid
volume % for total aromatics
Analysis of aromatics (Benzene, Toluene, Ethylbenzene, o-Xylene) in gasoline according to ASTM D5580
Instruments and Software
∙ ChroZen GC System
Item Description Part No.
Oven ChroZen GC Mainframe Assembly with UPC Detector Board Unit 6701012502
UPC UPC Packed Manifold Block Assembly for ChroZen GC 6701012660
Inlet Capillary Inlet Assembly for ChroZen GC 6701012550
Detector
FID Assembly for ChroZen GC 6701012590
TCD Assembly for ChroZen GC 6701012570
Liquid
Autosampler ChroZen PAL LSI system for liquid injection 6501011590
Mounting Kit for ChroZen GC PAL3-Kit-YI6700
Valve
Automatic Gas Valve, 2 pos/10 port, Micro-electric actuator type
with 250 ul sample loop
6501011280
Valve Control Case for ChroZen GC 6701012750
CDS
YL-Clarity software for single instrument of YCM GC 5301011020
Autosampler control of YL-Clarity 5301011040
Column
20% TCEP on 80/100 Chromosorb PAW 19040
Rxi-1 (30 m, 0.53 mm ID, 5μm 10179
ASTM D5580 is the mainly used method for determination of benzene, toluene, ethylbenzene, p/m-xylene, o-xylene, C9 and heavier aromatics in finished gasoline and the accurate backflush time control is required to have the all compounds completely separated in the analysis.
Aromatic compounds in gasoline were analyzed by ChroZen ASTM D5580 Player and two columns were used; micro-packed TCEP as pre-column and PDMS (Dimethylpolysiloxance) non-polar column. There are 2 methods (Methods A and Methods B) described in ASTM D5580 and it is required to choose one of them depending on what to identify.
The calibration mixtures of benzene, toluene, ethylbenzene, o-xylene and 1,2,4-trimethylbenzene were used for calibration curve and the correlation coefficients of all mixture are greater than 0.990 which satisfies ASTM specifications good enough. The calibration curve of benzene is shown as an example.
The repeatability in 5 sequences is about 0.37-0.85 %RSD, shown on the Table below.
As the result, mass % of aromatics are resulted 0.012 mass % for benzene, 0.131 mass % for toluene, 0.040 mass % for ethylbenzene, 0.033 mass % for o-xylene, 0.077 mass % for 1,2,4-trimethylbenzene each. It is satisfied with the acceptance criteria of ASTM D5580 as < 0.02 mass % for benzene, < 0.2 mass % for other aromatic compounds.
ChroZen ASTM D5580 player fully satisfies all the requirements indicated in ASTM D5580 with the ways in hardware and solutions by showing the great repeatability and linearity for analysis of aromatic compounds in gasoline. The qualified control report with the satisfied results for ASTM D5580 will be supplied along with the system.
