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Conclusion
Sample throughput for semivolatiles analysis can be significantly
increased by employing split injection with a higher initial oven tem-
perature and faster cycle time. Compared to splitless injection, analysis
times are faster and repeatability is improved, allowing more samples
to be run per shift.
For the complete technical details, visit
Figure 1 Analyzing semivolatiles in less than 13 min. is possible with split injection, due to faster temperature programming.
Avg. RF Avg. %RSD
Pyridine 1.533 0.9
Phenol 1.787 2
N-Nitroso-di- n-propylamine 0.991 2
2,4-Dichlorophenol 0.272 3
Naphthalene 0.998 5
Hexachlorocyclopentadiene 0.383 6
2-Nitroaniline 0.414 6
Acenaphthylene 1.824 3
2,4-Dinitrophenol 0.157 26
4-Nitrophenol 0.264 8
4,6-Dinitro-2-methylphenol 0.123 19
N-Nitrosodiphenylamine 0.608 3
Pentachlorophenol 0.127 16
Phenanthrene 1.082 5
Benzo(ghi)perylene 0.942 5
Data acquired using faster cycle split conditions shown in Figure 1; 6-point
calibration curve (5, 20, 40, 80, 120, and 160 µg/mL), n = 3 at each level.
Table III Split injection provides excellent linearity across the
typical calibration range of 5–160 ng/μL.
Increase Accuracy with an Inert Sample Path
Semivolatiles Wool from Restek improves precision and accuracy,
while protecting your column from contamination. This new
wool is more inert than a competitor’s MS Certified Wool and
gives you more reliable trace level results. For the complete com-
parison, visit
qty.
Deactivated Liner with
Semivolatiles Wool
each -231.1
5-pk. -231.5
25-pk. -231.25
To order new SemivolatilesWool in
prepacked liners, add the corresponding
suffix number to the liner catalog number.
Response of 10 ng of 2,4-dinitrophenol relative to
phenanthrene using a flame ionization detector.
Visit for
a full product listing.
GC_EV1184
Analyze 40% more samples
per shift using split injection!
Column: Rxi®-5Sil MS, 30 m, 0.25 mm ID, 0.25 µm (cat.# 13623) Sample: 8270 MegaMix® (cat.# 31850) Benzoic acid (cat.# 31879); 8270 Benzidines Mix (cat.# 31852); Acid Surrogate Mix
(4/89 SOW) (cat.# 31025); 1,4-dioxane (cat.# 31853); Revised B/N Surrogate Mix (cat.# 31887); SV Internal Standard Mix (cat.# 31206); Diluent: Methylene chloride; Conc.: 40 µg/mL
(4 ng on-column); Injection: Inj. Vol.: 1.0 µL split (split ratio 10:1); Liner: 4mm Split Precision® Liner w/ Semivolatiles Wool (cat.# 21023-231.5); Inj. Temp.: 270 °C; Split Vent Flow Rate: 60
mL/min.; Oven Temp: 80 °C (hold 1 min.) to 320 °C at 25 °C/min. to 330 °C at 5 °C/min. (hold 2 min.); Carrier Gas: He, constant flow; Flow Rate: 1.2 mL/min.; Detector: MS; Mode: Scan;
Transfer Line Temp.: 280 °C; Analyzer Type: Quadrupole; Source Temp.: 250 °C; Quad Temp.: 150 °C; Tune Type: DFTPP; Ionization Mode: EI; Scan Range: 35-400 amu; Instrument: Agilent
7890A GC & 5975C MSD. For peak list, enter chromatogram GC_EV1184 in search box on
TECH TIP!
9
Good peak shape at 80 °C
gives fast, accurate results.
For column information, see page 7
or visit
Website : E-mail : TelNo : 03 9762 2034 . . . in AUSTRALIA