| Attributes | |
|---|---|
| Mass Range | 100 to 4000 m/z |
| Mass Spectrometer Type | Ion-Trap Mass Analyzer |
| Depth | 59 cm |
| Height | 56 cm |
| Width | 79 cm |
| Power Requirements | 120 or 230 VAC single phase |
| Weight | 120 kg |
| Additional Specifications | Hardware Features Ion Max-S API Source - Enhanced sensitivity and ruggedness - Sweep Gas™ reduces chemical noise - 60° interchangeable ion probe orientation - Removable metal ion capillary tube provides vent-free maintenance Options - ESI source compatible with liquid flow rates of <1 µL/min to 1 mL/min, without splitting - APCI source compatible with liquid flow rates of 50 µL/min to 2 mL/min, without splitting - APCI/APPI source compatible with liquid flow rates of 50 µL/min to 2 mL/min, without splitting - Metal needle option for high- and low-flow analyses - HESI source compatible with liquid flow rates of <1 µL/min to 1 mL/min, without splitting - Nanospray II source supports static packed tip and dynamic nanospray experiments, compatible with liquid flow rates of 50 nL/min* to 2 µL/min * Lower limit is dependent on gauge of needle used Transfer Ion Optics - Advanced multipole ion guides - High stability and ion transmission efficiency Vacuum System - Differentially-pumped vacuum system to 10-5 Torr - Split-flow turbomolecular pump controls vacuum in three regions - High-vacuum machined aluminum analyzer chamber Detection System - Patented conversion dynode detector - Off-axis continuous dynode electron multipliers with extended dynamic range - Digital electronic noise discrimination - High-efficiency radial ion ejection Integrated Divert Valve - Fully-automated data system control enables user to divert to waste the solvent front, gradient end point and any other portion of the HPLC run - User-definable default state of the valve, either “to waste” or “to source” Integrated Syringe Pump - Syringe Pump allows automated infusion under data system control System Specifications MS/MS Sensitivity Electrospray Ionization (ESI)- A loop injection of 2 µL of a 1 pg/µL solution of reserpine (2 picograms, 3.28 picomoles total sample) at a flow of 400 µL/min of 50% isopropyl alcohol/50% water will produce a minimum signal-to-noise ratio of 100:1, for the transition of the isolated protonated molecular ion at m/z 609 to the largest two product ions, 397 and 448, when the mass spectrometer is operated at unit resolution in the full-scan MS/MS mode, scanning the product ion spectrum from m/z 165 – 615. Atmospheric Pressure Chemical Ionization (APCI)– A loop injection of 2 µL of a 1 pg/µL solution of reserpine (2 picograms, 3.28 picomoles total sample) at a flow of 400 µL/min of 50% isopropyl alcohol/50% water will produce a minimum signal-to-noise ratio of 100:1, for the transition of the isolated protonated molecular ion at m/z 609 to the largest two product ions, 397 and 448, when the mass spectrometer is operated at unit resolution in the full-scan MS/MS mode, scanning the product ion spectrum from m/z 165 – 615. Installation Requirements Power - One 230 Vac ±10.0%, 15 Amps, 50/60 Hz, single phase, with earth ground dedicated to the instrument - 120 or 230 Vac single phase, with earth ground for the data system Gas - One high-purity (99% pure, flow rate 15 L/min) nitrogen gas supply for the API source - One ultra high-purity helium gas supply (99.998% pure) with less than 1 ppm each of water, oxygen, and total hydrocarbons for the mass analyzer Environment - System averages 2300 W (8000 Btu/h) output when considering air conditioning needs - Operating environment must be 15-27 °C (59-80 °F) and relative humidity must be 40-80% with no condensation - Optimum operating temperature is 18-21 °C (65-70 °F) Dimensions/Weight - Roughing pumps: 38.6 kg Performance Specifications Mass Range - m/z 15 – 200 - m/z 50 – 2000 - m/z 100 – 4000 Resolution - Down to 0.3 FWHM (full width half maximum) with Zoom Scan Scan Power - MSn, for n = 1 through 10 - Contact Closure - Start In/Out - Start Out is programmable Analog Inputs - One (1) analog Input (0-1 V) - One (1) analog Input (0-10 V) |
LCQ Fleet Ion Trap
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My LCQ Fleet seems unable to go below 2E-5 Torr, and has stabilised around 2.15E-5.Anyone can point out what are the main causes of such failure?
thermo LCQ fleet_sensitivity issue..
I am unable to get sensitivity on the instrument, however Reserpine have shown the acceptable sensitivity for the system. Help!!
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