Tus qauv pH tsis muaj cov yam ntxwv hauv qab no:
(1) Tus nqi pH ntawm cov qauv kev daws teeb meem yog paub thiab ncav cuag qhov tseeb;
(2) Tus nqi pH ntawm cov qauv kev daws teeb meem muaj qhov zoo rov ua dua thiab ruaj khov, nrog lub peev xwm loj dua, tus nqi me me dilution, thiab me me coefficient kub;
(3) Txoj kev npaj ntawm kev daws yog yooj yim;
Yuav ua li cas npaj pH txheem tsis tov?
Rau kev ntsuas pH dav dav, ib txheej ntawm pH muaj pes tsawg leeg reagents (muaj peev xwm npaj 250mL) tuaj yeem siv. Thaum npaj cov tshuaj, cov dej deionized yuav tsum tau siv thiab ua ntej boiled rau 15-30 feeb kom tshem tawm cov carbon dioxide yaj. Txiav qhib lub hnab yas thiab ncuav lub reagent rau hauv lub beaker. Dissolve nws nrog ib tug npaum li cas ntawm cov dej deionized, yaug lub hnab ntim, thiab ces ncuav nws mus rau hauv ib tug 250mL volumetric hwj. Dilute rau lub cim thiab co zoo.
3. Yuav ua li cas khaws thiab siv cov tshuaj pH tsis zoo?
After preparing the buffer solution, it should be packed in a glass or polyethylene bottle (alkaline pH buffer solution, such as pH=9.18, pH=10.01, pH=12.46, etc., should be packed in a polyethylene bottle) with a tight lid. It should be stored in a refrigerator at low temperature (5-10 ℃) and can generally be used for about six months. If there is turbidity, mold, or precipitation in the existing mixer, it cannot be used again. When using, several 50mL polyethylene small bottles should be prepared, and the component solution from the large bottle should be poured into the small bottles. The bottles should be left at ambient temperature for 1-2 hours, and the temperature should be balanced before use. After use, it is not allowed to pour it into a large bottle to avoid contamination. The buffer solution in the bottle can be used for 2-3 days under environmental conditions>10 degree. Feem ntau, pH=7.00, pH=6.86, thiab pH=14.00 tuaj yeem siv tau ntev dua. pH=9.18 thiab pH=10.01 cov kev daws teeb meem nqus cov pa roj carbon dioxide hauv huab cua, thiab lawv cov pH tus nqi kuj hloov tau yooj yim.
