Nishondihandai gidrogeni

Nishondihandai gidrogeni, pH—buzurgie, ki konsentrasiya yo faoliyati ionhoi gidrogen (gid­roksil)-i mahlulro nishon medihad. Nishondihandai gidrogeni ba konseptrasiyai ionhoi gid­rogen, ki bo logarifmai manfi ifoda yoftaast (Sn+), yo faoliyati termodinamiki  pH = —LgCH+ yo pH — —Lg«H+. Dar muhiti neytrali (N-) – (ON ) = = 10-7 g. ion/litr yane pH = 7 ast. Dar muhiti kislotagi pH <7 va dar muhiti asosi pH > 7 meshavad. Qimati rN-ro asosan bo usulhoi potensiometri va kolorimetri chen mekunand. Nishondihandai gidrogeni va muayyan namudani on dar sanoathoi bofandagi, rangubor,dabbogi, qogaz, khimiya, khurokvori va gayra ahamiyati kalon dorad.