8. Conclusion

The gravimetric method proposed is simple to implement, but complex to analyze as many parameters interact. It should be analyzed at least once, but systematic calibration (or calculation of the measurement uncertainty of each pipette) is not necessary. Table 14 shows that the most important parameter is process repeatability, the other parameters being virtually constant. Taking process repeatability (the pipette's performance as well as the operator's skill) and associating it with the constant terms may suffice for a good assessment of pipette performance.

Standard NF EN ISO 8655-7 proposes photometric and titrimetric methods, but these are given for guidance only. They are applicable to large volumes...

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page Application of the EURACHEM method

Glossary

Bibliography

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

Events

Metrology Congress

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;

Standards and norms

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...