pH12.46, etc., should be packed in a polyethylene bottle) with a tight cap. It should be stored at a low temperature (5-10°C) in the refrigerator. Generally, it can be used for about two months. If there is turbidity, mildew, or precipitation, it cannot be used. When using, you should prepare several 50ml polyethylene vials, pour the buffer solution in the large bottle into the vial, and place it at ambient temperature for 1 to 2 hours, and wait for the temperature to equilibrate before use. Do not pour back into the big bottle after use to avoid contamination. The buffer solution in the small bottle can be used for 2~3 days under environmental conditions of >10 graus. Geralmente, o tempo de uso das três soluções de pH7.00, pH6.86 e pH4.00 pode ser usado. Por mais tempo, as soluções de pH 9,18 e pH 10,01 absorvem CO2 no ar e seus valores de pH são relativamente fáceis de alterar.
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