Kuyera nzira yezvakarembera zvakaomeswa: gravimetric nzira

1. Kuyera nzira yezvakarembedzwa zvakasimba: gravimetric nzira
2. Kuyera nzira musimboti
Sefa sampu yemvura ne 0.45μm sefa membrane, isiye pane sefa zvinhu woiomesa pa 103-105°C kusvika pahuremu hunoramba huri hwakasimba, uye wana zvakaturikwa zvakaomeswa mushure mekuoma pa103-105°C.
3. Kugadzirira usati waedza
3.1, Hovhoni
3.2 Analytical balance
3.3. Dryer
3.4. Sefa membrane ine pore saizi ye 0.45 μm uye dhayamita ye45-60 mm.
3.5, girazi faniro
3.6. Vacuum pombi
3.7 Kuyera bhodhoro rine dhayamita yemukati ye30-50 mm
3.8, muromo usina mazino wakatsetseka
3.9, mvura yakadirwa kana mvura yehutsanana hwakaenzana
4. Matanho ekuongorora
4.1 Isa sefa membrane mubhodhoro rekuyeresa rine matinji asina mazino, vhura kepu yebhodhoro, fambisa muovheni (103-105°C) woiomesa kwemaawa maviri, woibudisa woitonhodza kusvika mutembiricha yekamuri. desiccator, uye muyere. Dzokorora kuomesa, kutonhora, uye kuyera kusvika nguva dzose uremu (musiyano pakati pezviyero zviviri haupfuuri 0.5mg).
4.2 Kuzunungusa sampu yemvura mushure mokubvisa zvimedu zvakaturikwa, pima 100ml yesampuli yakasanganiswa zvakanaka woisefa nekusveta. Rega mvura yese ipfuure nepasefa membrane. Zvadaro geza katatu ne10ml yemvura yakasvibiswa nguva imwe neimwe, uye ramba uchikwevera kubvisa tsvina yemvura. Kana sampuli ine mafuta, shandisa 10ml yepetroleum ether kushambidza zvakasara kaviri.
4.3 Mushure mekumisa kusefa kwekudhonza, nyatso tora sefa membrane yakatakurwa neSS woiisa mubhodhoro rekuyeresa rine huremu hwepakutanga, fambisa muchoto uye woomesa pa 103-105 ° C kwemaawa maviri, wozoifambisa. mu desiccator, regai itonhorere kusvika kukamuri yekushisa, uye iremedze , kakawanda kuomesa, kutonhora, uye kuyera kusvikira kusiyana kwehuremu pakati pezviyero zviviri ≤ 0.4mg. the
5. Verenga:
Yakaturikwa yakaoma (mg/L) = [(AB)× 1000×1000]/V
Mune fomula: A--yakamiswa yakasimba + sefa membrane uye uremu hwebhodhoro (g)
B——Membrane uye uremu hwebhodhoro rehuremu (g)
V--mvura muenzaniso wehuwandu
6.1 Inoshandiswa chiyero cheiyo nzira Iyi nzira inokodzera kugadzwa kwezvakarembera zvakaomeswa mumvura yakasviba.
6.2 Kururamisa (kudzokororwa):
Kudzokorora: Muongorori mumwechete mu laboratory samples 7 samples yezinga rimwechete rekugadzirisa, uye chiyero chekuenzanisa (RSD) yemigumisiro yakawanikwa inoshandiswa kuratidza kunyatsojeka; RSD≤5% inosangana nezvinodiwa.