In 1, the proportion of water, acetone, ethyl ether bottle are cleaned, dried in the dryer to room temperature constant weight standby.
In2, the proportion of loading distilled water to the bottle scale line, standing for 20~ 30min after weighing proportion + water weight.
In 3, according to the required concentration of said admixture sample into500ml or 100ml in the beaker, first add a small amount of distilled water and stir to dissolve into the bottle, proportion, and then adding distilled water and shaken, so that the solution to the scale line, placing20 ~30min, weighing bottle into the additive weight.
4, test should be in 20 + / -2 DEG C.