Sulphuric acid for industrial use — Determination of chlorides content — Potentiometric method
Applicable to products having chloride contents equal or more than 0.0003 % (m/m) expressed in hydrochloric acid. Specifies the potentiometric titration of the chloride ions with silver nitrate solution in a sulphuric acid medium using a silver measurement electrode and a calomel reference electrode.
Acoustics — Assessment of noise with respect to its effect on the intelligibility of speech
Describes a practical survey method for assessment of the influence of noise on sentence intelligibility in direct communication. Describes a simplified method for the estimation of the maximum distance between speaker and listener as a function of the charakteristics of the noise.
Fishing nets — Netting — Basic terms and definitions
Provides examples (with figure) for the determination of length of mesh side, length of mesh, opening of mesh, direction in knotted netting, direction in knotless netting, and size of netting. - Replaces ISO Recommendation R 1107-1969.
