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Hp 5890A gas chromatograph w/ hp 5971A quadrupole msd
Hewlett Packard 5890A - 5971A Gas Chromatograph w/Quadrupole Mass Spectrometer
- Hewlett Packard Gas Chromatograph model 5890A
- Hewlett Packard Quadrupole Mass Selective Detector model 5971A
Injector B: Split, Temp. Limit 400 C
Detector A: Temp. Limit 400 C (for Mass Spec.)
Mother Board: 05890-60010 revision H
Network Card: 19257-60015 revision A
Bios: COCD DC REV9114 1925780040
Power Requirements: 99-127V, 60Hz, 4A, 1100VA, 1 Phase
DC Polarity (NEG) Bios 059901000 revision A
Missing 3 small ties for the Quad.
The quadrupole consists of four parallel metal rods. Each opposing rod pair is connected together electrically and a radio frequency voltage is applied between one pair of reds, and the other. A direct current voltage is then superimposed on the R.F. voltage. Ions travel down the quadrupole in between the rods. Only ions of a certain m/z will reach the detector for a given ratio of voltage: other ions have unstable trajectories and will collide with the rods. This allows selection of particular ion, or scanning by varying the voltage.
These Type of mass spectrometers excel at applications where particular ions of interest are being studied because they can stay tuned on a single ion for extended periods of time. One place where this is useful is in liquid chromatography-mass spectrometryor gas chromatography-mass spectrometry where they serve as exceptionally high specificity detectors. Quadrupole instruments are very good multi-purpose instruments.
Gas Chromatograph w/Quadrupole Mass Spectrometer
