SN/T 2891-2011 Food contact materials for export. Polymers. Determination of chromium, zirconium, vanadium and hafnium in polytene and polypropylene. Inductively coupled plasma atomic emission spectrometry
Food contact materials for export. Polymers. Determination of chromium, zirconium, vanadium and hafnium in polytene and polypropylene. Inductively coupled plasma atomic emission spectrometry