Bisa ga ka'idar Kjeldahl nitrogen ƙaddara, ana buƙatar matakai uku don ƙaddara, wato narkewa, distillation da titration.
Narkewa: Zafi nitrogen-dauke da mahadi kwayoyin halitta (sunadarai) tare da maida hankali sulfuric acid da mai kara kuzari (sulfate jan karfe ko Kjeldahl narkewa kamar Allunan) don bazu da furotin. Ana sanya carbon da hydrogen oxidized zuwa carbon dioxide da ruwa don tserewa, yayin da kwayoyin Nitrogen ya zama ammonia (NH3) kuma an haɗa su da sulfuric acid don samar da ammonium sulfate. (Ammonium NH4+)
Tsarin narkewa: dumama tare da ƙananan zafi don tafasa, abin da ke cikin flask yana da carbonized kuma ya yi baki, kuma an samar da adadi mai yawa na kumfa. Bayan kumfa ya ɓace, ƙara ƙarfin wuta don kula da yanayin tafasa kadan. Lokacin da ruwa ya zama blue-kore kuma bayyananne, ci gaba da zafi don 05-1h, kuma sanyi bayan karshen. (Zaka iya amfani da na'urar narkewa ta atomatik don kammala aikin riga-kafi)
Distillation: Maganin da aka samu yana diluted zuwa ƙararrawa akai-akai sannan kuma an ƙara shi tare da NaOH don saki NH3 ta hanyar distillation. Bayan dasawa, ana tattara shi a cikin maganin boric acid.
Tsarin distillation: Na farko, samfurin da aka narkar da shi yana diluted, an ƙara NaOH, da kuma iskar ammoniya da aka samar bayan dumama ya shiga cikin na'ura, kuma yana gudana cikin kwalban karban da ke dauke da maganin boric acid bayan an haɗa shi. Samfuran ammonium borate. (Ana ƙara wani gauraye mai nuna alama a cikin maganin boric acid. Bayan an samar da ammonium borate, maganin sha yana canzawa daga acidic zuwa alkaline, kuma launi yana canzawa daga purple zuwa blue-kore.)
Titration: Titrate tare da daidaitaccen bayani na hydrochloric acid na sananniya, ƙididdige abun ciki na nitrogen gwargwadon adadin hydrochloric acid da aka cinye, sannan a ninka shi ta hanyar juzu'i mai dacewa don samun abun cikin furotin. (Titration yana nufin hanyar bincike mai ƙididdigewa da kuma aikin gwaji na sinadarai. Yana amfani da amsa ƙididdiga na mafita guda biyu don tantance abin da ke cikin wani solute. Yana nuna ƙarshen titration bisa ga canjin launi na mai nuna alama. sa'an nan kuma gani a gani amfani da daidaitaccen bayani Volume, lissafi da sakamakon bincike.)
Tsarin titration: Sauke daidaitaccen bayani na hydrochloric acid a cikin maganin ammonium borate don canza launi na maganin daga shuɗi-kore zuwa ja mai haske.
DRK-K616 atomatik Kjeldahl nitrogen analyzer ne na atomatik mai nazari na hankali don ƙaddara abun ciki na nitrogen dangane da hanyar Kjeldahl. Ana iya amfani dashi ko'ina a cikin sarrafa abinci, samar da abinci, taba, kiwon dabbobi, takin ƙasa, kula da muhalli, magani, aikin gona, binciken kimiyya, koyarwa, kulawa mai inganci da sauran fannoni don nazarin nitrogen da furotin a cikin macro da Semi-micro. samfurori. Hakanan za'a iya amfani da shi don gishiri ammonium, Gano m acid / alkali, da dai sauransu Lokacin amfani da hanyar Kjeldahl don ƙayyade samfurin, yana buƙatar shiga cikin matakai uku na narkewa, distillation, da titration. Distillation da titration sune manyan hanyoyin aunawa na DRK-K616 Kjeldahl nitrogen analyzer. Nau'in DRK-K616 mai nazarin nitrogen na Kjeldahl cikakken tsarin distillation ne ta atomatik da tsarin ma'aunin nitrogen wanda aka ƙera bisa tsarin ƙayyadaddun ƙayyadaddun nitrogen na Kjeldahl; wannan kayan aikin yana ba da babban dacewa ga masu gwajin gwaje-gwaje a cikin aiwatar da ƙayyadaddun sinadarin nitrogen-protein. , Kuma yana da halayen aminci da abin dogara; aiki mai sauƙi da adana lokaci. Tsarin tattaunawa na kasar Sin yana sa mai amfani da shi cikin sauki don aiki, hanyar sadarwa tana da abokantaka, kuma bayanan da aka nuna suna da wadata, ta yadda mai amfani zai iya saurin fahimtar amfani da kayan aikin.
Lokacin aikawa: Fabrairu-25-2022
