This Standard Reference Material (SRM) is intended for use in the evaluation of equipment, and the validation of methodology used to measure electrophoretic mobility. A unit of SRM 1980 consists of a single 60 cm3 polyethylenebottle containing 40 cm3 of suspension, which is to be diluted prior to analysis. The suspension consists of 500 mg/L goethite (a-FeOOH) suspension saturated with 100 mumol/g phosphate in a 5 x 10-2 mol/L sodium perchlorateelectrolyte solution at a pH of 2.5. The goethite powder consists of acicular particles with an average dimension of 60 nm x 20 nm as determined from electron microscopy. For more information, please refer to the COA and SDS.SRM 1980_cert SRM 1980 _SDS
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