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Continuous Flow Hydride Generator for Atomic absorption spectrometer

420 Continuous Flow Hydride Generator


The Model 420 is an easily adaptable accessory for flame Atomic Absorption  spectrometers that allows PPT detectability for As, Se, Sb, Sn, Te, Bi, and Ge using standard hydride generation procedures. Using inert Polymer components and a reliable pumping system, users can quickly switch between flame and hydride.

Allows superior detection limits for hydride metals compared to graphite furnace Atomic Absorption Spectroscopy, typically in the 100-500 PPT.

Does not require hydrogen gas.

Easy installation and removal for changing back to flame operation.

Four order of magnitude dynamic range using the Buck Atomic absorption spectrometers for highest accuracy over a wide range of sample concentrations while minimizing dilutions, and errors.

Inert tubing gives rapid equilibration time allowing typical through-puts of 50 samples per hour with reproducibilities of better than 2% at the 500 PPT level.

Detection Limits for
Buck 420 Hydride Generator

Wavelength (ABS) Min. Detection Limit Typical RSD@10PPB
Arsenic (As)
193.7 nm 0.15 PPB 1.50%
Bismuth (Bi)
223.1 nm 0.25 PPB 2.10%
Antimony (Sb)
206.8 nm 0.20 PPB 1.80%
Selenium (Se)
196.0 nm 0.35 PPB 2.60%
Tin (Sn)
286.3 nm 1.0 PPB 8.50%
Tellurium (Te)
214.3 nm 0.30 PPB 3.10%



 420 Brochure

420 Manual

 EPA - method - 206_3 - Arsenic AA - Gaseous-Hydride.pdf

 Sub PPB arsenic and selenium detection via Flame Atomic Absorption

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