Tanpon estanda pH la gen karakteristik sa yo:
(1) Valè pH solisyon estanda a konnen epi li rive nan presizyon espesifye a;
(2) Valè pH solisyon estanda a gen bon repwodiksyon ak estabilite, ak yon pi gwo kapasite tanpon, pi piti valè dilution, ak pi piti koyefisyan tanperati;
(3) Metòd preparasyon solisyon an senp;
Ki jan yo prepare yon solisyon tanpon estanda pH?
Pou mezi jeneral pH, yo ka itilize yon seri konplè reyaktif konpozisyon pH (kapab prepare 250mL). Lè w ap prepare solisyon an, yo ta dwe itilize dlo deyonize epi bouyi anvan pou 15-30 minit pou retire gaz kabonik ki fonn. Koupe ouvri sak plastik la epi vide reyaktif la nan yon beaker. Fonn li ak yon kantite apwopriye dlo deyonize, rense sak anbalaj la, epi vide l nan yon flakon volumétrique 250mL. Delye nan mak la epi souke byen.
3. Ki jan yo byen estoke epi sèvi ak solisyon tanpon pH?
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 degre. Anjeneral, pH=7.00, pH=6.86, ak pH=14.00 ka itilize pou yon tan ki pi long. Solisyon pH=9.18 ak pH=10.01 absòbe gaz kabonik nan lè a, epi valè pH yo relativman fasil pou chanje.
