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کروماتوگرافی گازی 7890B GC

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7890B GC

محصولات >> تجهیزات آنالیتیکال >> کروماتوگرافی >>
کد کالا : 1008
قیمت : 0 (تومان)
مبلغ قابل پرداخت : 0   (تومان)
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بررسی تخصصی و اجمالی

Chromatographic Performance:    

  • Retention time repeatability <0.008% or
  • Area repeatability <1% RSD

 

 

System Capabilities:

  • Support simultaneously:
  • two inlets<?/i>
  • three detectors (third detector as TCD or ECD)
  • four detector signals
  • State-of-the-art detector electronics and the full-range digital data path enable peaks to be quantified over the entire concentration range of the detector (107 for the FID) in a single run
  • Full EPC is available for all inlets and detectors. Control range and resolution are optimized for the specific inlet or detector module.
  • Up to six EPC modules can be installed, providing control of up to 16 channels of EPC
  • Pressure setpoint and control precision to 0.001 psi provides more retention time locking precision for low-pressure applications
  • EPC with capillary column provides four column flow control modes: constant pressure, ramped pressure (3 ramps), constant flow, or ramped flow (3 ramps). Column average linear velocity is calculated.
  • Atmospheric pressure and temperature compensation is standard, so result do not change, even when the laboratory environment does
  • Low Thermal Mass (LTM) Series II system can be added to achieve fastest cycle times via rapid LTM capillary column module heating and cooling
  • Serial port interface for Remote Advisor or Optional Bar code reader
  • One-button access to maintenance and service modes from the keyboard
  • Preprogrammed leak tests
  • Automatic Liquid Sampling is fully integrated into mainframe control
  • Setpoint and automation control can be done from local keyboard or time programming can be initiated from the front panel to initiate events (on/off, method start, etc.) at a future date and time
  • A run time deviation log is created for each analysis to ensure that all method parameters were achieved and maintained
  • A fully array of traditional gas sampling and column switching valves are available
  • 550 timed events
  • Display of all GC and ALS setpoints at the GC or data system
  • Context-sensitive online help

 

 

 

Column Oven:

  • Dimension:28 x 31 x 16 cm, accommodate up to two 105 m x 0.530 mm id capillary columns or two 10-ft glass packed columns (9 in. coil diameter, 1/4 in. od.), or two 20-ft stainless steel packed columns (1/8 in. od)
  • Operating temperature range suitable for all columns and chromatographic separations. Ambient temperature +4°C to 450°C
  • With LN2 cryogenic cooling: -80 to 450°C
  • With CO2 cryogenic cooling: -40 to 450°C
  • Temperature setpoint resolution 0.1°C
  • Supports 20 oven ramps with 21 plateaus. Negative ramps are allowed.
  • Maximum achievable temperature ramp rate: 120°C/min (120 V units are limited to 75°C/min)
  • Maximum run time: 999.99 min (16.7 h)
  • Oven cool down (22°C ambient) 450 to 50°C in 4.0 min (3.5 min with oven insert accessory)
  • Ambient rejection: <0.01°C per 1°C

 

 

Electronics Pneumatics Control (EPC):

  • Compensation for barometric pressure and ambient temperature changes is standard
  • Pressure has typical control of ±0.001 psi for the range of 0 to 150 psi. Pressure setpoints may be adjusted in increments of 0.001 for the range 0.000 to 99.999 psi; 0.01 psi for the range 100.00 to 150.00 psi
  • User may select pressure units as psi, kPa or bar
  • Pressure/flow ramps: Three
  • Carrier and makeup gas settings selectable for He, H2, N2, and argon/methane
  • Flow or pressure setpoints for each inlet or detector parameter with both Agilent 7890B and Agilent ChemStations
  • Constant flow mode is available when capillary column dimensions are entered into the 7890B
  • Split/splitless, Miltimode, and PTV inlets have flow sensors for the control of split ratio
  • Pressure Sensors:
  • Accuracy <± 2% full scale
  • Repeatability: <±0.5 psi
  • Temperature coefficient: <±0.1 psi/6 months
  • Flow Sensors:
  • Accuracy: <± 5% depending on carrier gas
  • Repeatability: <± 0.35% of setpoint
  • Temperature Coefficient: <± 0.20 mL/min (NTP) per °C for He or H2; <± 0.05 mL/min NTP per °C for N2 or Ar/CH4
  • Detector Modules:
  • Accuracy: <± 3 mL/min NTP or 7% of setpoint
  • Repeatability: <± 0.35% of setpoint

 

 

Inlets:

  • Maximum of two inlets installed
  • EPC compensated for atmospheric pressure and temperature variation
  • Inlets available:
  • Packed purged injection port (PPIP)
  • Standard and Inert Flow Path Split/Splitless capillary inlets (S/SL)
  • Multimode inlet (MMI)
  • Temperature-programmable cool on-column (PCOC)
  • Programmable temperature vaporizer
  • Volatiles inlet (VI)

 

 

Detectors:

Electronic pneumatics control and electronic on/off for all detector gases

  • EPC compensated for atmospheric pressure and temperature variation
  • Detectors available:
  • Flame ionization detector (FID)
  • Thermal conductivity detector (TCD)
  • Micro-electron capture detector (micro-ECD)
  • Nitrogen-phosphorus detector (NPD)
  • Newly designed single-wavelength flame photometric detector (FPD) or dual-wavelength flame photometric detector (DFPD)
  • SCD (model 355)
  • NCD (model 255)
  • Mass spectrophotometer (see 5977, 7000, 7200 and 240 MSD specifications)
  • Other detectors – Pulsed Flame Photometric (PFPD), Photoionization (PID), Electrolytic Conductivity (ELCD), Halogen Specific (XSD), Oxygenate Flame Ionization (O-FID), and Pulsed Discharge Helium Ionization (PHID)

 

Auxiliary EPC devices:

The 7890B GC has two position for auxiliary EPC devices located on the back of the GC. Each position can be any combination of auxiliary EPC or pneumatics control module.

 

 

 

Auxiliary EPC Module:

  • Three channels of pressure control
  • EPC compensated for atmospheric pressure and temperature variation when connected to a user-defined capillary column
  • Psig (gauge) and psia (absolute) pressure control
  • Forward pressure regulated
  • Maximum of 2 auxiliary EPC modules per GC

 

 

Pneumatics Control Module (PCM):

  • 2 channels for operation
  • EPC compensated for atmospheric pressure and temperature variation when connected to a user-defined capillary column
  • First channel:
  • Pressure or flow control
  • Psig (gauge) and psia (absolute) pressure control
  • Forward pressure regulated
  • Second channel:
  • Pressure control
  • Psig (gauge) and psia (absolute) pressure control
  • Forward or back pressure regulated
  • PCM can be located in either/both inlet EPC positions, and in either/both auxiliary positions on the back of the 7890B GC
  • Maximum of 3 PCMs per GC

 

Environmental Conditions:

  • Ambient operating temperature: 15 to 35°C
  • Ambient operating humidity: 5% to 95%, non-condensing
  • Storage extremes: -40°C to 70°C
  • Power requirements: 120/200/220/230/240 V ±10% of nominal, 50/60 Hz

 

Dimensions (H x W x D):49 x 58 x 51 cm

Weight:49 kg

 

 

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