Which is a good PerkinElmer second-hand gas chromatography-mass spectrometry device

Platinum Elmer Clarus 500 GC-MS specification parameters

The following parameters are based on a summary of search results, mainly covering the hardware, control system, and functions of gas chromatography (GC) and mass spectrometry (MS).

1‌. Gas chromatography (GC) section

Sample injection system:

Programmable capillary sampler (PSS) supports temperature programming and carrier gas programming, allowing for large volume injection (up to 150 μ L), simplifying sample pretreatment and improving detection sensitivity.

Split flow mode setting: If using automatic gas path, the split flow rate can be directly set through the keyboard (for example, it is recommended to set it to 50 mL/min in mass spectrometry mode).

Air path control:

Programmable full gas path control system (PPC), which electronically programs the carrier gas (such as helium) and auxiliary gas path (hydrogen, air, etc.), monitors abnormalities in real time, and automatically alarms.

Flow regulation: The manual air circuit is controlled by a regulating valve, while the automatic air circuit can be directly set through a keyboard.

Detector specifications:

Hydrogen flame ionization detector (FID):

The hydrogen flow rate is 45 mL/min, and the air flow rate is 450 mL/min.

Working temperature>150 ° C to prevent pollution and water accumulation; There is no need for tail blowing when installing capillary columns.

Electron Capture Detector (ECD):

Working temperature>300 ° C to reduce pollution; A deoxygenation filter needs to be installed.

The total flow rate of the carrier gas is 30 mL/min (including tail blowing); Manual or automatic adjustment.

Thermal conductivity detector (TCD):

Dual channel design (reference channel and analysis channel).

The carrier gas flow rate needs to be balanced through soap film flowmeter or automatic setting; When using 0.53mm or 0.32mm capillary columns, tail blowing can be avoided.

Nitrogen phosphorus detector (NPD): The parameters are not detailed in the search results.

2. Mass spectrometry (MS) section

Mass spectrometer detector:

The model is Clarus 500 MS, which is used in conjunction with gas chromatography and requires a capillary column connection interface.

Vacuum system:

The vacuum degree can reach 3.0 × 10 ⁻⁵ Torr; The waiting time after startup depends on the type of pump (5 minutes for turbomolecular pump and 20 minutes for diffusion pump).

The initial flow rate of the carrier gas (helium) is set to 1 mL/min to assist in vacuuming.

Software and Control:

Standard TurboMass software for mass spectrometry tuning, data acquisition, and processing (such as scanning data processing).

Start up process: Activate the pump system through software and monitor the vacuum pressure gauges (Pirani and Penning gauges) in real-time.

3. Overall system configuration and functionality

Hardware composition:

The standard configuration includes PerkinElmer Clarus 500 gas chromatograph, Clarus 500 mass spectrometer detector, computer (pre installed with TurboMass software), and necessary components (pipelines, wiring).

Performance and Application:

Support the combination of headspace sampler (such as TurboMatrix) for quantitative detection of volatile or semi volatile compounds (such as halogenated hydrocarbons, benzene derivatives, pesticides).

Air tightness inspection requires professional operation, and system leak detection includes comprehensive positioning and engineer assistance steps.

Operating environment:

Stable supply of carrier gas (such as helium) is required.

The above parameters are comprehensive from instrument configuration, detector characteristics, and system operation guidelines, and are applicable to the standard Clarus 500 GC-MS model.