DIN EN 15944:2011 液体石油产品.镍和矾含量的测定.电感耦合等离子体发射光谱测定法(ICP OES).德文版本EN 15944-2010
Liquid petroleum products - Determination of nickel and vanadium content - Inductively coupled plasma optical emission spectrometry method (ICP OES); German version EN 15944:2010