This part of ISO 3856 describes a flame atomic emission spectrometric (AES) method for the determination of the barium content of the test solutions prepared according to ISO 6713 or other suitable International Standards. The method is applicable to paints having "soluble" barium contents in the range of about 0,05 to 5 % (m/m). Other methods can be used by agreement between the interested parties but this method is the referee method in cases of dispute.