Aurora Spectrophotometer Background Correction

Background Correction in General

For maximum cost effectiveness, it is important to utilise the optimum method of background correction. Many spectrometers on the market employ popular methods of background correction that are established for the manufacturer but do not offer the best solution for the customer. To determine the best overall method, the following criteria for high performance are applied as necessary:

High modulation frequency - to enable high speed measurement of signal.
High speed data aquisition - to maximise the number of data points per peak.
High energy source and high efficiency optics - for a high signal to noise ratio.
Spatial overlapping of HCL and D2 beams to minimise background residue.

Aurora's Background Correction Techniques

The AI 1200 Atomic Absorption Spectrophotometer has taken into account two different background correction techniques to provide chemists with flexibility and the abililty to resolve background interferences associated with the majority of AAS applications.

The Aurora AI 1200 uses both Smithe-Hiejte and Deuterium background correction methods.

Smith-Heijte Correction Technique

This technique is used in the AI 1200 as a standard feature to provide chemists with a simple low cost correction technique. Some of the benefits of this method include:

It provides correction over a greater wavelength range
It uses the same light source to provide signal
It is a low cost technique

Deuterium Correction Techniques

Aurora Instruments have selected the Deuterium method as the optimum blend of cost effectiveness and high detection performance and have developed a new generation of systems to meet exsisting and future customer needs. This provides a new level of performance incorporating the following features that have made superior detection and excellent sensitivity the norm for Aurora instruments.

With the superior control of heating and high speed data aquisition, analyte signals can be seperated from the background. Extremely high background can be corrected with the use of our Time Resolved Background Correction Technique.

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