Ukwethulwa kwemishini ye-Kjeldahl ezenzakalelayo

Ithuluzi lokunquma le-nitrogen elizenzakalelayo le-Kjeldahlukusebenza komsebenzi:

Imisebenzi eyenziwa kusampula yokuhlola ithuluzi ingokulandelayo: ukuhlanjululwa, ukungezwa kwe-reagent, ukucwiliswa kwe-distillation, ukukhishwa kwe-titration, ukuchithwa kwamanzi angcolile, ukubalwa kwemiphumela, ukuphrinta.

I-Dilution: nciphisa isampula eligayiwe kushubhu lokugaya ngamanzi acwecwe.

Engeza ama-reagents: kufaka phakathi i-lye, isisombululo sokumuncwa kwe-boric acid, i-titrating acid.

I-Distillation: Dlulisa isampula kushubhu lokugaya kusisitimu esishisayo ukuze kushunqe igesi ye-ammonia kusampula.

I-Titration: I-Titration yesisombululo esimunnyiwe ngesikhathi noma ngemva kokukhishwa kwe-distillation.

Khipha uketshezi: khipha uketshezi olungcolile epayipini lokugaya kanye nenkomishi yokwamukela.

Bala bese uphrinta: bala bese uphrinta umphumela ngokuya ngokusebenza.

Inqubo yokuhlola isampula:

(1) Faka ithuluzi bese uxhuma ipayipi.

(2) Vula i-condensate, beka ishubhu lokugaya elingenalutho, vula ithuluzi kuqala isitimu somoya imizuzu emi-5 ukuya kweyi-10, hlanza ipayipi, ukuze ukugeleza komhwamuko kuzinze.

(3) Beka ishubhu lokugaya eliqukethe uketshezi lokugaya bese usetha amapharamitha ahambisanayo nemisebenzi ngaphambi kokuqala ukuhlolwa. Umsebenzi wokuthola ngesikhathi sangempela unikwe amandla ngesikhathi esifanayo. Engeza isixazululo sokumuncwa kwe-boric acid, nciphisa amanzi kanye ne-lye ku-automatic Kjeldahl apparatus; I-ammonia ekhiqizwa yi-steam distillation imuncwa ukujiya nge-boric acid bese ihlanganiswa ne-asidi evamile.

(4) Ukuhlolwa kuphelile futhi imiphumela iyaboniswa. Ingakwazi ukuphrinta, ukukhipha udoti futhi ihlanze ngokuzenzakalelayo. Isikrini sokuqala sokufaka ipharamitha siyaboniswa.

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