Method for control or calibration in a chemical analytical determination

An aqueous dispersion that contains a calibration or control substance for a dry analysis element,

• wherein said aqueous dispersion comprises water and water-insoluble liquid particles having a mean particle size of from about 0.01 to 10 micrometers formed from a water insoluble liquid selected from the group consisting of water insoluble liquid phthalates, water insoluble liquid trimellitates, water insoluble liquid phosphoric esters, water insoluble liquid benzoates, N,N-diethyllaurylamide, N-tetradecylpyrrolidone, 2,4-di-t-amylphenol, water insoluble liquid aliphatic esters, water insoluble liquid paraffins, water insoluble liquid chloroparaffins, water insoluble liquid adipates, water insoluble liquid sebacates, and sodium alginate, and
• wherein said calibration or control substance is selected from the group consisting of a component of organic body fluids, red dyes, triolein, glycerine, (NH.sub.4).sub.2 SO.sub.4, NH.sub.4 Cl, CaCl.sub.2, Ca(NO.sub.3).sub.2, MgCl.sub.2, NaCl, KCl, K.sub.2 HPO.sub.4, and NANO.sub.3, and further wherein said calibration or control substance reacts with a color-producing reagent of the dry analysis element to give a color, thereby calibrating or providing a control for the dry analysis element.