‣Each standard is prepared from maximum purity salts and acids, 18 megohm double deionized water with polishing to eliminate carbon.
 

‣The certified value is obtained by ionic chromatography and is calculated from mathematical equations taking into account the uncertainty linked to instrumental errors, weighing and dilutions.
 

‣The certifed value is calculated within 95% of the admitted interval.
 

‣Two different analytical methods enable to validate the certified value and to confirm the rightness of the reference material.
 

‣Precision is +/- 0,2% of the nominal concentration
 

‣Each bottle is delivered with a Certificate of Analysis indicating the impurity content and the traceability (NIST,BCR,LGC).
 

‣Packaging: High density polyethylene bottle decontaminated by high purity acid leaching, 18 megohm  deionized water and triple rinse.