The standard establis es a method for determining fresh concrete's content of water-soluble chlorides. The method is a reference method for other methods for determining fresh concrete's chloride content, e.g. when the results from other, simpler methods mean that a question mark can be rais d as to how suitable the concrete is The method requires, in the parts that deal with chemical analysis a well-equipped laboratory. The number of samples is not dealt with in the standard.