Yintoni isisombululo sesithinteli se-pH?

A isithinteli pH isisombululoluhlobo lwesisombululo esinokugcina ixabiso le-pH lizinzile. Ukuba ixabiso elincinci le-asidi okanye isiseko songezwa kwesi sisombululo, okanye ixabiso elincinci le-asidi okanye isiseko siveliswa ngokusabela kweekhemikhali kwisisombululo, okanye isisombululo sihlanjululwe ngokufanelekileyo, ixabiso le-pH yesi sisombululo lihlala lizinzile. Isisombululo esinjalo sinokumelana nexabiso elincinci le-asidi okanye isiseko okanye i-dilution kwaye ugcine ixabiso le-pH ekutshintsheni lula libizwa ngokuba yisisombululo se-pH se-buffer.

Izisombululo zesithinteli se-pH zohlulwe zibe ziindidi ezimbini eziphambili: izisombululo ezisemgangathweni zesithinteli kunye nezisombululo eziqhelekileyo zesithinteli.

Izisombululo ezisemgangathweni ze-buffer zisetyenziselwa ubukhulu becala ukulungelelaniswa kwesixhobo kunye nokubeka indawo xa iimitha ze-pH zilinganisa ixabiso le-pH lezisombululo, kunye neemfuno zamaxabiso achanekileyo nachanekileyo. Ngoko ke, kukho iimfuno eziqinileyo zokuhlambuluka kwama-reagents, ukuchaneka koxinzelelo, ukushisa, njl.

EqhelekileyoIzisombululo zebufferzisetyenziswa kakhulu kwinkqubo yokumisela uhlalutyo lweekhemikhali kunye nohlalutyo lwezixhobo apho ixabiso elithile le-pH lifuna ukulawulwa. Phantse zonke ii-EDTA ze-complexometric titrations kufuneka zenziwe phakathi koluhlu lwe-pH ethile, ngoko ke isisombululo se-pH sebuffer kufuneka sifakwe.