Reference Materials Production
LGC has been involved in the production of chemical reference materials for over 10 years. During that time about 100 'single substance' and 80 matrix reference materials have been certified.

The single substance materials, which are primarily intended for calibrating analytical instruments, include pesticides certified for purity, organic compounds certified for melting point and UV, Visible and IR standards with certified wavelength and absorbance values.

The matrix materials, which enable the accuracy of an entire analytical procedure to be checked, include food products certified for proximates and trace elements and environmental materials, such as soils, sediments and waters, certified for organic and inorganic contaminants.

The materials are produced according to guidelines issued by the International Organisation for Standardisation (ISO), such as ISO Guide 35 - The Certification of Reference Materials. Reference values and uncertainties are assigned to the materials using data obtained either from interlaboratory studies, or from the application of specific analytical methods in one or two laboratories. For certain materials, state-of-the-art primary methods are used. To complete the characterisation of a material, homogeneity and stability assessments are also carried out.

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