Indlela yokutholwa ye-Ca2+:
Izinsimbi zokuhlola nama-reagents: ama-beakers; I-conical flask; Ifaneli; I-Burette; Isithando somlilo sikagesi; I-ethanol engenalutho; I-Hydrochloric acid, isisombululo se-NH3-NH4Cl sebhafa, inkomba ye-calcium, isisombululo esijwayelekile esingu-0.02mol/LEDTA.
Izinyathelo zokuhlola:
1. Kala ngokunembile inani elithile lesampula yosizo lokucubungula i-ACR (linembile libe ngu-0.0001g) bese ulibeka kubhika. Imanzise nge-ethanol anhydrous, bese wengeza ngokweqile kwe-1: 1 hydrochloric acid futhi uyishise esithandweni sikagesi ukuze uvumele ama-ion e-calcium ukuthi asabele ngokugcwele nge-hydrochloric acid;
2. Geza ngamanzi bese uhlunga ngefaneli ukuze uthole uketshezi lwawo olucacile;
3. Lungisa inani le-pH libe likhulu kuno-12 usebenzisa isisombululo sebhafa se-NH3-NH4Cl, engeza inani elifanele lesikhombi se-calcium, kanye ne-titrate ngesisombululo esivamile esingu-0.02mol/LEDTA. Isiphetho yilapho umbala ushintsha usuka konsomi ngokubomvu ukuya koluhlaza okwesibhakabhaka okumsulwa;
4. Yenza ukuhlolwa okungenalutho kanyekanye;
5. Bala C # a2+=0.02 $(V-V0) $0.04004M $%&&
V - Umthamo wesixazululo se-EDTA esidliwe lapho kuhlolwa amasampula osizo lokucubungula i-ACR (mL).
V # - Umthamo wesisombululo esidliwe ngesikhathi sokuhlolwa okungenalutho
M - Kala isisindo sesampula yosizo lokucubungula i-ACR (g).
Indlela yokushisa yokulinganisa izinto ezingaphili:
Izinsimbi zokuhlola: ibhalansi yokuhlaziya, isithando somlilo se-muffle.
Izinyathelo zokuhlola: Thatha amasampula osizo lokucubungula angu-0.5,1.0g ACR (anembile kuye ku-0.001g), uwabeke esithandweni se-muffle esingaguquki esingu-950 bese ushisa ihora elingu-1, bese upholisa futhi ukale ukuze ubale impahla eshile esele. Uma izinto ezingaphili zingezwa kusampula yezinsiza zokucubungula ze-ACR, kuzoba nezinsalela eziningi.
Indlela yokuncibilikisa:
1. Amathuluzi okuhlola kanye nebhalansi yokuhlaziya i-reagent; 25mL isitsha se-volumetric; I-Trichloromethane.
Isinyathelo sesi-2: Ngokwendlela yokuhlola i-ACR intrinsic viscosity, kala u-75mg wesampula bese uyibeka kuflask yevolumu engu-25mL. Engeza i-trichloromethane solvent. Uma kukhona i-turbidity noma ukukhanya okubonakalayo
Isikhathi sokuthumela: May-27-2024
