Environmental solid matrices — Determination of the specific electrical conductivity
Specifies an instrumental method for the routine determination of the specific electrical conductivity in an aqueous extract of soil. The determination is carried out to obtain an indication of the content of water-soluble electrolytes in a soil.
Information technology — Methodologies to evaluate the resistance of biometric systems to morphing a...
This standard establishes requirements for biometric recognition systems that could become subject to morphing attacks.
The standard establishes:
• Taxonomy of biometric sample modifications and manipulation with a specific focus on manipulations that constitute a multiple identity attack. This can be for instance an enrolment attack with face image morphing.
• Requirements for testing databases…
Jewellery and precious metals — Determination of silver — ICP-OES method using an internal standard ...
This document specifies an analytical method for the determination of silver on a material considered homogeneous. The silver content of the samples lies preferably between 50 ‰ (parts per thousand) and 990 ‰ (parts per thousand). Fineness above 999,0 ‰ can be determined using a spectroscopy method by difference (e.g. ISO 15096).
NOTE Lower contents of silver can be analyzed with this method.
Wheat and wheat flour — Gluten content — Part 2: Determination of wet gluten and gluten index by mec...
ISO 21415-2:2015 specifies a method for determining the content of wet gluten and the gluten index for wheat flours (Triticum aestivum L. and Triticum durum Desf.) by mechanical means. This method is directly applicable to flours. It also applies to common and durum wheat after grinding, if their particular size distribution meets the specification given in Table B.1.
Propylene oxide for industrial use — Part 2: Determination of aldehydes — Liquid chromatography
This document specifies the test method for the determination of aldehydes in propylene oxide for industrial use by high performance liquid chromatography.
This document is applicable to the determination of the four aldehydes in industrial propylene oxide, including formaldehyde, acetaldehyde, propionaldehyde, acrolein. The concentration ranges from 1 mg/kg to 100 mg/kg, and the content of…
Vegetable fats and oils — Determination of composition of triacylglycerols and composition and conte...
This document specifies the determination of composition of triacylglycerols and the determination of the composition and content of diacylglycerols by capillary gas chromatography in vegetable oils with a lauric acid content below 1 %.
Applying certain technological processing 1,2-diacylglycerols (1,2-DAGs) are transformed to the more stable isomeric 1,3-diacylglycerols (1,3-DAGs) due to acidic…
Carbonaceous materials for the production of aluminium — Pitch for electrodes — Determination of con...
Specifies a conventional gravimetric method for the determination. A test portion ist reated with quinoline in a beaker at 70 to 80 °C for 15 to 20 min. Then the dissolved test portion and the residue are brought to a Hartley funnel fitted with a filter pad, and are filtered. The washed and dried residue on the filter pad is weighed.
Carbonaceous materials for the production of aluminium — Pitch for electrodes — Determination of con...
Specifies a gravimetric method, the principle of which consists in weighing the fraction of a test portion of pitch which is insoluble in toluene after boiling for a specified period.
