State system for ensuring the uniformity of measurements. Optics and optical instruments. Field procedures for testing geodetic and surveying instruments. Part 2. Levels
Workplace air. Determination of metals and metalloids in airborne particulate matter by inductively coupled plasma atomic emission spectrometry. Part 1. Sampling
Caprolactam for industrial use. Determination of colour of 50% aqueous caprolactam solution expressed in Hazen units (platinum-cobalt scale). Spectrometric method
