Kugwiritsa ntchito chida cha Kjeldahl nitrogen determination:
Ntchito zogwirira ntchito zomwe zimachitidwa pachitsanzo choyesera zida ndi izi: dilution, reagent kuwonjezera, distillation, titration, effluent discharge, kuwerengera zotsatira, kusindikiza.
Dilution: chepetsani chitsanzo chogayidwa mu chubu cham'mimba ndi madzi osungunuka.
Add reagents: kuphatikizapo lye, boric acid mayamwidwe njira, titrating acid.
Distillation: Ikani chitsanzo mu chubu cha digestion mu nthunzi yotentha kuti mutulutse mpweya wa ammonia mu chitsanzocho.
Titration: Kumangirira kwa madzi osungunuka mkati kapena pambuyo pa distillation.
Kukhetsa madzi: Chotsani zotayira mu chubu cham'mimba ndi chikho cholandira.
Werengetsani ndi kusindikiza: kuwerengera ndi kusindikiza zotsatira malinga ndi ntchito.
Zitsanzo zoyeserera:
(1) Ikani chidacho ndikulumikiza payipi.
(2) Tsegulani condensate, ikani chubu chopanda kanthu m'mimba, tsegulani chida choyamba mpweya wotentha kwa 5 ~ 10min, yeretsani payipi, kuti mpweya wamadzi ukhale wokhazikika.
(3) Ikani chubu cham'mimba chomwe chili ndi madzi am'mimba ndikuyika magawo ndi magwiridwe antchito musanayambe mayeso. Ntchito yozindikira nthawi yeniyeni imayatsidwa nthawi yomweyo. Onjezani yankho la boric acid mayamwidwe, sungunulani madzi ndi lye mu zida za Kjeldahl zokha; Ammonia opangidwa ndi steam distillation amatengedwa ndi condensation ndi boric acid ndiyeno titrated ndi muyezo asidi.
(4) Kuyesera kwatha ndipo zotsatira zikuwonetsedwa. Ikhoza kusindikiza, kutaya zinyalala ndikuyeretsa zokha. Chiwonetsero choyambirira cha parameter chikuwonetsedwa.
Nthawi yotumiza: Feb-28-2022
