Measurement and characterization of particles by acoustic methods - Concepts and procedures in ultrasonic attenuation spectroscopy1 Scope This part of ISO 20998 describes ultrasonic methods for determining the size distributions of one or more material phases dispersed in a liquid. Colloids, dispersions, slurries and emulsions are within the scope of this part of ISO 20998. The typical particle size for such analysis ranges from 10 nm to 3 mm, although particles outside this range have also been successfully measured. Measurements can be made for concentrations of the dispersed

The method in BS 4651-2 is applicable to solutions containing not more than 35 % (m/m) of ammonia

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ISO 22088-4 and ISO 22088-5

a new ISIL can be allocated

Fire protection and gas supply

that may be used in advertising

would not be included in the candidate list in the future (new substances are regularly included in the list)

Manufacturers and suppliers of fenders and vessel berthing products

This part of IEC 61481 is applicable to portable phase comparators of capacitive type to be used on electrical systems for voltages exceeding 1 kV a

BS EN ISO 45001:2023 Occupational health and safety management systems

enumeration of phytoplankton using inverted microscopy