AS 2883-2000 pdf download.Analysis Of Metals – Procedures For The Setting Up, Calibration And Standardization Of Atomic Emission Spectrometers Using Arc/Spark Discharge.
AS 2883 specifies practices for the setting up. calibration and standardization of equipment for the atomic emission spectrornetric analysis of metals using arc/spark discharge. This Standard details test procedures used to ensure optimum response from this equipment.
NOTE: A glossary of terms used in this Standard is included for reference in Appendix A.
5.3 STANDARDIZATION
5.3.1 Principle
Standardization is also known as ‘normalization’, drift correction’. or ‘recalibration’. The measured intensities obtained from spectrometer channels for a specific set of conditions vary with time. To compensate for this variation and to ensure that the intensities being referred to the stored calibration are valid for that calibration, it is necessary to adjust the currently measured intensities for each channel.
The standardization is performed by referring intensities obtained currently on normalization standards to intensities obtained on the same standards at the time of initial calibration (Clause 5.2).
The frequency of standardization, which will depend on the stability of the instrument and the required precision of the determination, should he determined by each individual laboratory. The need for standardization can be determined by analyzing a known homogeneous reference sample and assessing the results obtained. As a guide for instruments in regular use, a reference sample should he analyzed and the results checked for each element, at least every four hours. If maintenance has been performed on the instrument, then the reference sample shall be analyzed and the instrument standardized. if necessary. If repeated standardizations fail to give satisfactory results for the reference sample, instrument performance should be checked in accordance with Clause 4; ultimately, a new calibration may need to be carried out.
AS 2883-2000 pdf download
Tags: Analysis Of Metals
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