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235ATS Atomic Absorption Spectrometer

235ATS Atomic Absorption Spectrometer


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Just say NO to service contracts!

At Buck Scientific we do not offer service contracts, because we believe in building the most reliable Atomic Absorption Spectrometers in the world is what customers really want. Why pay $4,000-$6,000 a year for maintenance just to be told after 7 years that your instrument can no longer be fixed?  Buck customers spend between $1,500-2,000 dollars every 3-4 years, and we are still servicing instruments from the 1980's! 


Since 1970 our goal here at Buck Scientific has been to make instruments that are easy to use, and maintain for many years, at minimal expense.  We take a hands on approach to customer service by answering our own phones.  You can talk to the engineer who assembled your instrument, for quick and friendly support.  Call us today with your AA questions 800-562-5566, or email Eric Anderson
Atomic Absorption Spectrometer
Atomic Absorption Spectrometer

The 235ATS is designed for analysts requiring nitrous oxide to run Al, Si, Ga, Ge Ba, Be, Ti, Va, Zr, Nb, Mo, Hf, Ta, and W. The automated gas box (seen above) allows for push button oxidant change-over from Air to Nitrous oxide for safety.  The 235ATS also features a flame detector which will turn the gases off shall the flame extinguish.


  • 10" color touchscreen
  • Automated wavelength selection
  • Automated Slit selection
  • Easy to operate 5 tab GUI (Graphical User Interface)
  • Automatic gas box for easy changeover from Air to N2O
  • Push button ignition
  • Emergency gas shut-off in case of flame outage
  • 4 USB ports for printer, mouse, and keyboard
  • Stable, Reliable, & Easy to use.
  • 3 lamp turret with 3 lamp power supply,
  • High energy optical design for better As & Se results
  • Ink Jet Printer with spare black cartridge
  • Compact size and light weight
  • Military grade design stands up to years of corrosive environment usage.
  • D2 Background correction
  • Low cost consumables and maintenance
  • Manufactured and supported in the USA
  • No service contract needed
  • Free In-House training for the life of the instrument
  • CE Certified
  • Leasing options available (USA ONLY)

235ATS Atomic Absorption Spectrometer Brochure

 Atomic Absorption Spectrometer Pre-Installation Guide

 235ATS Atomic Absorption Spectrometer Manual

Replace your current Buck AA with the new 235ATS, and
Get 10% off with your virtual trade in, just send us the Serial number for your AA to receive the special offer.  Contact us today for a quote 

The New 235ATS will continue Buck's long tradition of making dual beam Atomic Absorption Spectrometers with in-line Deuterium background correction. Our simple optical design gives our systems superior energy, and better results than double beam AA systems. Our unique design also allows our instruments to have a smaller footprint and a lower cost.


Buck Scientific 230ATS Atomic Absorption Spectrometer analysis screen

Atomic Absorption Spectrometer


Analytical Performance

The Buck 230ATS is a high energy, microprocessor controlled single beam atomic absorption spectrometer. Solid state electronics and simple optics provide the basis for our superior stability and sensitivity. The Ebert mount monochromator and user-selectable bandwidth give the system maximum flexibility. Our short-path dynamic nebulizer/burner configuration is highly efficient. An inert needle, precisely positioned in a high flow venturi, delivers sample to the corrosion proof impact bead. This results in a tremendously high nebulization effect for all types of sample matrices.


Buck Scientific 230ATS Atomic Absorption Spectrometer Optical Design

Atomic Absorption Spectrometer

Optical Layout

From the time of the initial developments of Atomic Absorption Spectrometry (AAS) 50+ years ago the concept of the single beam optical system was always a fundamental design consideration. It allowed high energy throughput for the best detection limits, smaller and fewer components for the best size, and low manufacturing costs for the best price. Unfortunately, those original single beam AAS instruments made over 50 years were not used routinely due to the inherent deficiencies in the components of the time: poor hollow cathode lamp characteristics, noisy power supplies, drifting detectors & amplifiers, thermal expansion variations in optical components (mirrors, beam splitters, mounts, etc.), and so forth. To compensate for these deficiencies, and to help them stay in business; the AAS manufacturers developed the double beam optical system that became the standard design for AAS instruments over the next 30 years.


Typical Atomic Absorption Spectrometer Optical Diagram

Atomic Absorption Spectrometer


By using a high light-loss optical component (the beam splitter) to divide the signal beam from the hollow cathode lamp, served to correct for these low performance components; thus halving the available energy to make a sample measurement, compensation between the reference and sample beams was maintained. In later years, the addition of a deuterium continuum lamp for background correction introduced a second beam splitter; thus cutting the hollow cathode lamp energy in half again. This does not even take into account the 6-10 additional Mirrors used to define the optical path for these large, heavy and expensive (albeit very stable) double beam AAS instruments.

The Buck Scientific line of Atomic Absorption Spectrometers were designed to utilize the maximum energy of the single beam optical system. This allowed us to build a smaller, less expensive and more sensitive instrument. Background correction was achieved by inserting the deuterium lamp directly after the hollow cathode lamp.

A general rule of thumb for optical engineers is every time a mirror is introduced into a lightpath it deducts 10% of the energy. So in this case, less really is more!

With a 10" touchscreen computer on-board guiding you through your analysis, using an AA Spectrometer has never been easier! The All new Graphical User Interface utilizes five tabbed screens for; Analysis, controls, library, calibration, and samples. The 4 front facing USB ports make connecting a mouse and extracting data onto usb flash discs easy! Our Hideaway keyboard makes naming your samples easy and conveniently tucks in when not in use.


Buck Scientific 235ATS Atomic Absorption Spectrometer Calibration Screen

Atomic Absorption Spectrometer


Buck Scientific 235ATS Atomic Absorption Spectrometer Library Screen

Atomic Absorption Spectrometer


How to Set Up the 235ATS Atomic Absorption Spectrometer

Copper Calibration using the 230ATS Atomic Absorption Spectrometer

Atomic Absorption Spectrometer Pre-Installation Guide



Wavelength Range: 190 to 900nm, Accuracy ± 0.2nm, Precision ± 0.1nm
Monochromator / Optics: 250mm Ebert mount, 600 lines/mm grating, 0.2-0.7-2.0nm bandpass
Hollow Cathode Lamp Supply: Triple HCL power supply; 3 to 75 mA peak.  The 225ATS has a three lamp design.
Background Correction: Deuterium - In-Line (see-through) configuration, pulsed illumination, hot cathode, variable frequency, corrects from 190-350nm (0.7nm slit). 
Burner / Nebulizer: Polypropylene spray chamber with pre-mix burner and high efficiency adjustable nebulizers (SS), Titanium burner heads for Air/Acetylene, Argon/Hydrogen and Nitrous Oxide/Acetylene operation.
Microprocessor: Computer control by 80C188 chip, 8/16 bit operation, 12/24 MHz clockspeed; non-volatile SRAM storage of >200 method files.
Integration / Response Range: User selectable times from 0.5 to 10 seconds for continuous (flame) and transient (furnace, hydride) signals.
Calibration: Automatic, weighted least squares fit to 1st, 2nd, 3rd, or 4th order functions, up to 8 points.
Display: 10" Color touchscreen
Output Modes: USB x 4
Dimensions / Weight: 39"L x 11"W x 12"H; 50 lbs (81 lbs shipping weight)
Power Supply: 100-240 VAC operating range, 50/60 Hz AC, <150 watts

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