DIN 50990:2018-12 Measurement of coating thickness - Measurement of the area-related mass of metallic layers by means of spectrometric measurement methods
2018DIN 50990:2018-12 Measurement of coating thickness - Measurement of the area-related mass of metallic layers by means of spectrometric measurement methods
1993DIN 50990:1993 Measurement of coating thickness; determination of the mass per unit area of metallic coatings by atomic absorption spectrometric method; flame method, F AAS