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Calibration
The calibration valve is an electromechanical valve with a vial for tuning compounds.
Perfluorotributylamine (PFTBA) is the most commonly used tuning compound. It is
required for automatic tuning of the MSD in EI mode. The tuning compound is usually
a liquid but can be a volatile or semi-volatile solid.
The calibration vial can be refilled without venting the system. Fill the vial to 0.5 cm from
the top. Do not overfill. Air is trapped in the vial when it is refilled. This sometimes causes
an "Excess source pressure" error message during the first tune after refilling. This is more
likely if the vial is overfilled. Be sure to purge the air upon refilling the vial.
Calibration Standards
Description 5975 Series 5973 Series 5972 Series 5971 Series
OFN, 1 pg/µL 5188-5348 5188-5348
OFN, 100 fg/µL 5188-5347
Benzophenone, 100 pg/µL 8500-5440 8500-5440 8500-5440 8500-5440
PHFT, 100 pg/µL 5188-5357
PFTBA sample, certified, 10 g 8500-0656 8500-0656 8500-0656 8500-0656
PFTBA MS Sample Kit, 0.5 mL 05971-60571 05971-60571
PFDTD calibrant 8500-8510 8500-8510
Evaluation sample
Solution of dodecane, biphenyl,
p-cholorodiphenyl, and Methyl
palmitate in isooctane.
Six 1.0 mL ampoules: 4 at 10 ng/µL,
1 at 100 ng/µL, 1 at 100 pg/µL.
05970-60045 05970-60045 05970-60045 05970-60045
p-Bromofluorobenzene (BFB),
25 µg/mL
8500-5851 8500-5851 8500-5851 8500-5851
Hexachlorobenzene 10 pg/µL, 1 ng/µL 8500-5808
Methyl stearate (in methanol);
1 ng/µL, 2 ea
05990-60075
GC/MS tuning standard 8500-5995 8500-5995 8500-5995 8500-5995
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