Model AAS-1E2 / 1E3 Atomic Absorption Spectrophotometer

FEATURES

·           Perfect optical system with high energy.

·           Various atomization systems including flame, furnace and hydride are available for extending analytical functions Innovative design of the electronics microcomputer system  with high stability and reliability.

·           Complete functions and easy operation.

·           Background correction adopts the advanced deuterium arc background correction system with strong correction capability.

·           Various kinds of accessories and spare parts are available for enhancing use of the instrument.

MAIN SPECIFICATIONS:   ·     Wavelength range:190-900nm ·     Wavelength accuracy:±0.5nm ·     Resolution: Better than 0.3nm ·     Baseline Stability: ±0.005A/30min ·     Background absorption up to 1A can be corrected.

TECHNICAL SPECIFICATIONS

Light Source System

·           Primary and auxiliary source is modulated by 400HZ pulse with time-shared system.

·           Lamp current is set by the microcomputer. Duty cycle of supplied current is 1:5.

·           The mean current is 0.0-20mA (max. peak current can be reached up to 200mA).

·           The deuterium lamp current can be auto-adjusted. Current range is from 70 to 100mA.

·           The two hollow cathode lamps can be lit simultaneously.

Optical System

·           Photometric system: Single-beam, dual-lens optics.

·           Monochromator Ebert design, grating monochromator Plane diffraction grating with 1200L/mm, blazed at 250nm, spectral bandwidth: 0.2,0.4,1.0,2.0nm.

Flame Atomization System

·           5cm and 10cm changeable all-titanium, single-slot burner head.

·           The chamber is internally coated with corrosion-resistant plastic.

·           Provide adjustable metal nebulizer and high-efficiency glass nebulizer with metal sheath.

·           Gas control system uses pressure gauge, flow meters with needle valve, pressure-stabilizer for monitoring and adjusting both fuel and oxidant gases and has an air-N₂O changeover and flashback preventing device.

·           Adjusting mechanism of the vertical, horizontal positions and rotating angle for burner head.

·           Auto-igniting mechanism. (optional)

Detection System

Photomultiplier with high sensitivity and wide spectral range is used as signal detector.

Electronic-Microcomputer System

·         The source energy and high voltage of photomultiplier can be automatically adjusted and balanced.

·           Energy and measuring values are displayed on LED.

·           The signals of atomic absorption, background correction or background can be detected.

·           Signal readout mode includes transient, integral, peak height, peak area.

·           Selected integral or sampling time is in the range of 0.1-19.9s.

·           Reading delay time can be selected from 0 to 9.9 sec.

·           Scale expansion is from 0.1x to 99x.

·           All readings and statistics including mean, standard deviation and relative standard deviation can be automatic calculated.

·           Selected repeating number is in the rang of 1-99.

·           Working curve is automatic fitted with three standard.

·           The concentration of sample can be directly read.

·           The slope of working curve with a standard can be re-calibrated.

·           Printing functions: totally or partially printout measurement data, calibration curve, graphics and analytical conditions.

·           The parameters set up by each function key can be checked.

·           Built-in special parallel interface, compatible computer can be connected.

ENVIRONMENTAL REQUIREMENTS

·           Operating Temperature: 5-35°C

·           Relative Humidity: Less than 85%

·           Power Supply: 220V/110V, 50/60Hz, 220W,Single phase

·           Dimension: 1150(L)×370(D)× 510(H)mm

·           Weight: 110Kg

More functions of model AAS-1E3: Fast scanning of wave length, auto protection of gas channel

Model AAS-120 / 130 Atomic Absorption Spectrophotometer

FEATURES

• High sensitivity, simple and safe operation, low analytical cost, ensured by the new patented flame analysis technique (patent No.92101560) adopting oxygen-rich air-acetylene flame instead of nitrous oxide-acetylene for high temperature element analyses.
• Fully automated microcomputer controlled operation
  1. Automatic wavelength peaking for quick and precise operation.
  2. Automatic spectral bandwidth selection.
  3. Automatic hollow cathode lamp changeover.
  4. Automatic instrument parameter setting, including light source power supply, photomultiplier high voltage supply and background correction energy balance.
  5. Automatic signal measurement and data processing. Fast sampling, photo-electric conversion, noise smoothing, integration, curve fitting, background correction and data display can all be done automatically.
• Fully sealed optical system, keeping the optical elements clean and dry and ensuring long-term high energy throughput.
• Optimum vibration-absorbing mechanism, ensuring good mechanical stability of the optical system, reducing vibration interference in graphite furnace operation.
• Two background correction systems, deuterium arc background correction system (with imported deuterium arc lamp) and S-H background correction system to realize background correction at all wavelengths.
• Multi-analytical functions, providing flame AA, graphite furnace AA, and hydride AA analysis.

SPECIFICATIONS

• Wavelength range: 190-900nm
• Wavelength accuracy: ±0.5nm
• Resolution: Better than 0.3nm
• Baseline Stability: 0.006A/30min.
• The characteristic concentration (characteristic mass), detection limit, and precision of the representative elements are superior to those specified in the specialized standards.
• The S-H background correction capacity is up to 1.8A.
• Light Source System: 6-lamp turret
  1. The hollow cathode lamp can be powered by two pulses (wide and narrow) simultaneously.
  2. Lamp current is automatically adjusted by microcomputer.
      Adjustable range: wide pulse current 0-25mA
                                 narrow pulse current 0-10mA
                                 deuterium arc current 0-100mA
• Optical System
  Photometric system: single beam
  Monochromator:
      Czerny-Tw-Turner design grating monochromator,
      Grating: 1800L/min, blazed at 250nm
      Focal length: 277mm,
      Spectral bandwidth: 0.1, 0.2, 0.4, 1.2nm.
• Flame Atomization System
  1. 10cm single slot all-titanium burner (with a 5cm slot standby).
  2. All-plastic spray chamber.
  3. High efficiency glass nebulizer with metal sleeve.
  4. Gas control system provides pressure indication, flow adjusting and stabilizing, and oxygen-air    mixing functions.
  5. Multi-protection for the gas system: fuel gas leak protection, abnormal flame extinguish alarm, air underpressure protection and explosion-proof device.
  5. Adjusting mechanism for vertical, horizontal positions and the rotation angle of the burner.       
  6. Automatic ignition mechanism.
• Detection System
  The photomultiplier tube with high sensitivity and wide spectral range is used as the signal detector.
• Electronic-Microcomputer System
  1. Automatic instrument parameter setting.
  2. Atomic absorption, background absorption and background correction signals can be detected and displayed separately.
  3. Signal readout modes include transient, integration, peak height and peak area values. Integration time range is 0-30 seconds.
  4. Scale expansion range: 0.1-100 times.
  5. Automatic calculation of statistics such as the mean value, standard deviation and relative standard deviation in repeat measurement. Selected repeating number is in the ranges of 0-30 seconds.
  6. Multi-standards working curve fitting with up to 30 standards.
  7. Automatic display, storage and printout of data, signal graphics and working curve.
  8. Standard microcomputer interface, connected with graphite furnace power supply, enables fully automated graphite furnace analysis.

ENVIRONMENT REQUIREMENT Ambient temperature: 10℃-30℃ Humidity: less than 85% Power requirement: 220v, 50Hz, 5A

DIMENSION AND WEIGHT

Dimension: 960 (L) X 510 (D) X 550 (H) mm
Weight: unpacked 70kg

WF-1C GRAPHITE FURNACE POWER SUPPLY

Features

• New technology of light-controlled rapid heating and temperature control adopted. The true value of furnace temperature is real-time displayed by microcomputer.

• Working methods of fixed voltage and light-controlled dual curves adopted to greatly improve the instrument's self-adapting ability to the unfavorable environmental factors. The system is independent of the fluctuation of power mains, the tube resistance, and the cooling water of graphite furnace. Therefore analytical precise is improved.

• Bench construction with LED display and integration of the keyboard and the chip microcomputer.

• Serial interface is available to communicate with the PC. Working program can be preset via keyboard. All parameters can be displayed on CRT. Heating curve of graphite furnace can be real-time plotted. The curves of absorption, background and temperature can be displayed simultaneously.

• Interfaces to the main unit and autosampler are provided to realize full automation of the graphite furnace.
• Pneumatic closing structure adopted to ensure constant pressure and reliable contact.
• Protections for over-heating, over-current, and over-power and argon pressure monitoring functions are available.

Technical Specifications

• Temperature range: 20℃--3000℃
• Light-controlled temperature range: 1500℃-3000℃
      Temperature control accuracy: 1%
      Reproducibility: 0.5%
• Heating rate: 3000℃/s
• Analytical Precision: superior to the national standards (Cd: no less than 4%, Cu: better than 5%)
• Power consumption: 50Hz, 380V, 6kvA
• Dimension: 420(L) X 420(W) X 460(H)mm
• Weight: unpacked 45kg

SYSTEM CONTROL AND DATA PROCESSING

• Two-stage computer control. The main computer employs a PIII compatible PC.
• The spectrophotometer main communicates with the main computer via the RS-232C interface.
• It can be used with all windows compatible printer and plotter.
• Windows operating system.
• Analytical software functions:
  Automatic wavelength peaking;
  Automatic adjustment of hollow cathode lamp current;
  Automatic slit setting:
  Automatic gain balancing;
  Multi-windows mode selection;
  Instrument parameter setting;
  Reference conditions for standard analysis;
  Wavelength scanning;
  Curving fitting;
  Report presentation.

Main functions of AAS-130: 
auto switch of 4-lamp turret, auto set of wave length, auto switch of Spectral bandwidth, Auto-igniting mechanism, total automatic gas protection, and deuterium arc background correction system.  Others are same as AAS-120