1. Metrological evaluation

The most widely used control method is the gravimetric method. However, there is another method, the colorimetric method:

calibration using the gravimetric method consists in determining the volume of water delivered by the automatic pipette. This volume of water is obtained from knowledge of the measured mass and its density, after integration of corrections due to the influence of environmental parameters and any evaporation;
Calibration using the colorimetric method involves introducing the element to be measured into a reaction resulting in a colored compound. Light absorption is determined for a specific wavelength, using a device that measures the intensity of transmitted light. To carry out the assay, simply refer to a calibration curve previously established from a series of solutions of known concentrations....

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Metrological evaluation

Bibliography

(1) - METTLER-TOLEDO SA - Balances et pesées – Balances et pesées. - [P 1 380]...

The 17th International Metrology Congress, organized by the Collège français de métrologie, will take place in Paris from September 21 to 24, 2015.

This congress, which takes place every two years, has the following objectives:

review original calibration and measurement techniques developed or under development;

Détermination de l'incertitude de mesure pour les mesurages volumétriques effectués au moyen de la méthode gravimétrique - ISO/TR 20461 - 11-00
Laboratory water for analytical use – Specification and test methods. Identical to ISO 3696 - NF EN ISO 3696 - 09-95
Oil measurement system – Calibration – Temperature correction for use with volumetric reference measuring systems. Identical to ISO 8222 - NF EN ISO 8222...