Ukwaziswa kwezixhobo zeKjeldahl ezizenzekelayo

Isixhobo esizenzekelayo se-Kjeldahl nitrogenumsebenzi wokusebenza:

Imisebenzi esebenzayo eyenziwa kwisampulu yovavanyo lwesixhobo yile ilandelayo: i-dilution, i-reagent Ukongeza, i-distillation, i-titration, i-effluent discharge, ubalo lwesiphumo, ukuprintwa.

I-Dilution: nciphisa isampuli egayiweyo kwi-tube yokugaya ngamanzi adibeneyo.

Yongeza i-reagents: kubandakanywa i-lye, isisombululo sokufunxa i-boric acid, i-titrating acid.

Idistillation: Dlulisa isampulu kwityhubhu yokwetyisa ibe ngumphunga oshushu ukukhupha irhasi yeammonia kwisampulu.

I-Titration: I-Titration yesisombululo esifunxiweyo ngexesha okanye emva kokukhutshwa kwe-distillation.

Khupha ulwelo: Khupha ulwelo olubi kwityhubhu yokwetyisa kunye nekomityi yokwamkela.

Bala uze uprinte: bala uze uprinte umphumo ngokomsebenzi.

Inkqubo yovavanyo lwesampula:

(1) Faka isixhobo kwaye udibanise umbhobho.

(2) Vula i-condensate, beka ityhubhu yokwetyisa engenanto, vula isixhobo kuqala umphunga womoya kangange-5 ~ 10min, coca umbhobho, ukuze umphunga wamanzi uzinze.

(3) Beka ityhubhu yokugaya equlethe ulwelo lokugaya kwaye usete iiparamitha ezihambelanayo kunye nemisebenzi ngaphambi kokuba uqalise uvavanyo. Umsebenzi wokufumanisa ixesha lokwenene unikwe amandla ngexesha elinye. Yongeza isisombululo sokufunxa i-boric acid, nciphisa amanzi kunye ne-lye kwi-automatic Kjeldahl apparatus; I-ammonia eveliswa yi-steam distillation ifunxwa yi-condensation kunye ne-boric acid kwaye ifakwe i-asidi eqhelekileyo.

(4) Uvavanyo luphelile kwaye iziphumo zibonisiwe. Inokushicilela, ikhuphe inkunkuma kwaye icoceke ngokuzenzekelayo. Isikrini sokuqala sepharamitha sibonisiwe.

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