Currently, the metrological traceability of pH measurements for bioethanol is not ensured due to the lack of ethanol based reference buffer solutions. This situation leads users to calibrate their pH-electrode by means of aqueous buffer solutions, creating serious problems of reliability of measurement results. The potassium hydrogen phthalate (KHPh) solution with molality 0.05 mol·kg^-1 was studied as a possible primary buffer in water-ethanol mixture (mass fraction 50 %). The study was carried out in the temperature range from 15 °C to 35 °C.
For this purpose, the potentiometric method based on the Harned cell (cell without liquid junction) typically employed for the characterisation of primary dilute aqueous buffer solutions has been used. In order to assess the comparability of primary pH values on KHPh buffer, the results obtained by four NMIs (National Metrology Institutes) will be presented.

Buoyancy effects due to cylinder expansion are taken into account as an important source of uncertainty in weighing for the preparation of primary or standard gas mixtures by gravimetric methods. Although linear cylinder expansion upon pressurization is known, reliable information on changes in the volumes of gas cylinders is very scarce. We present newly useful information on the magnitudes of changes in the volume depending upon different cylinder materials and volumetric capacities during gas filling and venting. We also found that he literature estimate of about 20 mL for the magnitude of volume expansion for 5-L cylinder capacity at 15 MPa appears significantly overestimated. Our estimate based on the experimental results in this study is within the upper limit of about 14 mL. It is therefore recommended for gas metrology and research communities to use this updated information.

Water dispersible graphene has been prepared by noncovalent functionalization of graphene oxide using sulfonated poly(ether ether ketone) (SPEEK). Both the chemical and electrochemical method has been employed to noncovalently attach the SPEEK macromolecules on the surface of graphene. In chemical methods, SPEEK macromolecules are attached on the surface of graphene oxide followed by reduction using hydrazine monohydrate. On the contrary, electrochemical exfoliation of graphite to graphene occurs in presence of SPEEK macromolecules in aqueous medium under a potential difference of 30 V. The functionalized graphene has been characterized successfully to confirm the attachment of hydrophilic functionalities on to graphene.

An optical system to measure the degree of curing of extruded plastics will be presented. The setup consists of a mercury vapour UV–lamp and filters, so that the fluorescence and the phosphorescence of the specimen can be measured. In the luminescence spectrum the information about the curing ratio is quantified. Theoretical disquisitions and preliminary measurement results will be presented in this contribution.

This paper describes how innovation in metrology is interlinked with innovation in products and processes and strong implications of this fact for green growth.
The Taxonomy of the ways of innovation in metrology and a model based on the study An Assessment of the United States Measurement System have been used.
The project consists on the validation of an innovative technology for green and effective growth of crops developed by one of the authors of CBM™. This is done through three blocks of tests and measurements in equal sets of metrological disciplines.
The study presented is a demonstration of the value that metrology can provide for radical innovation in the field of green production of food.