240FS AA - Atomic Absorption Systems

BY
Agilent
Agilent

Description

The 240FS AA is a fast sequential atomic absorption spectrometer that can double sample throughout and dramatically reduce running costs. Able to handle multi-element suites with ease, the Agilent 240FS AA system is ideal for environmental, food, and agriculture labs. The 240FS AA features automatic lamp selection, programmable gas box, and D2 background correction. A full range of AA accessories enable extra capabilities.

Key Differences

  • Reduce your analysis time by determining the concentration of all elements from a single aspiration.

  • Reduce sample consumption with less delay throughout analysis and less sample waste.

  • Get accurate results by determining 10 elements per sample in < 2 minutes without sacrificing data quality.

  • Improve precision and accuracy with online internal standard corrections for physical differences, sample preparation errors, or drift.

  • Simplify your analysis by taking the guess work out of the method development with SpectrAA comprehensive cookbook.

  • Tune your flame AA performance with the Mark 7 atomization system.

  • Mark 7 atomization system can achieve high sensitivity -- typically > 0.9 Abs. from 5 mg/L Cu.

Technical Specification

In flame atomic absorption spectroscopy (AAS), the sensitivity is defined as the concentration of analyte that produces 1% absorption signal (0.0044 Abs). This proved to be a very valuable diagnostic concept. When instrumental conditions were set correctly, this value for sensitivity was very predictable. As graphite furnace AAS deals with an absolute amount of analyte, it seems preferable that mass be substituted for concentration. By analogy with flame AAS, it is defined as the amount in mass units that produces 0.0044 integrated absorbance (1% absorption). Characteristic Mass In 1955, Alan Walsh (1) noted that graphite furnace AAS could be an absolute method. In 1984, Walter Slavin (2) proposed the concept of characteristic mass in graphite furnace, defined as the absolute mass of analyte giving a peak area of 0.0044 absorbance. In 1986, Boris L'Vov (3) published a comparison of the theoretical and calculated characteristic mass for 40 elements using integrated absorbance signals. If the results showed some limitations of the absolute method, the experimental characteristic mass became a tool to control/ check the day to day operation of a given GFAAS instrument and the applied methodology. The Stabilized Temperature Platform Furnace (STPF) concept (6), developed by Slavin in 1981, demonstrated that the characteristic mass can be relatively independent of the sample matrix. Theoretical characteristic masses were calculated with the model developed by L’Vov in 1986 (3). This correlation can be used to optimize operating conditions and steps of the temperature program to give an experimental mass close to theoretical characteristic mass.

240FS AA - Atomic Absorption Systems

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