Njira yoyezera zolimba zoyimitsidwa: njira ya gravimetric

1. Njira yoyezera zolimba zoyimitsidwa: njira ya gravimetric
2. Mfundo ya njira yoyezera
Sefa zitsanzo za madzi ndi 0.45μm fyuluta nembanemba, zisiyeni pa zosefera ndikuziwumitsa pa 103-105 ° C mpaka kulemera kosalekeza, ndipo pezani zolimba zomwe zayimitsidwa mutatha kuyanika pa 103-105 ° C.
3. Kukonzekera musanayese
3.1, uvuni
3.2 Kuwerengera bwino
3.3. Chowumitsira
3.4. The nembanemba fyuluta ali pore kukula kwa 0.45 μm ndi awiri a 45-60 mm.
3.5, galasi la galasi
3.6. Pampu ya vacuum
3.7 Kulemera botolo ndi mkati mwake 30-50 mm
3.8, zibowo zapakamwa zopanda mano
3.9, madzi osungunuka kapena madzi achiyero chofanana
4. Njira zoyesera
4.1 Ikani nembanemba ya fyuluta mu botolo loyezera lokhala ndi zoyezera zopanda mano, tsegulani kapu ya botolo, ikani mu uvuni (103-105 ° C) ndikuyiumitsa kwa maola awiri, kenaka muitulutse ndikuziziritsa mpaka kutentha kwapakati. desiccator, ndi kulemera kwake. Bwerezani kuyanika, kuziziritsa, ndi kulemera mpaka kulemera kosalekeza (kusiyana pakati pa miyeso iwiri sikuposa 0.5mg).
4.2 Gwirani chitsanzo cha madzi mukachotsa zolimba zomwe zayimitsidwa, yesani 100ml yachitsanzo chosakanikirana bwino ndikuchisefa ndi kuyamwa. Lolani madzi onse adutse nembanemba ya fyuluta. Kenaka yambani katatu ndi 10ml ya madzi osungunuka nthawi iliyonse, ndipo pitirizani kusefera kuchotsa madzi pang'ono. Ngati chitsanzocho chili ndi mafuta, gwiritsani ntchito 10ml ya petroleum ether kutsuka zotsalirazo kawiri.
4.3 Pambuyo poyimitsa kusefera koyamwa, tulutsani mosamala nembanemba ya fyuluta yodzaza ndi SS ndikuyiyika mu botolo loyezera ndi kulemera kwake kosalekeza, kusunthira mu uvuni ndikuumitsa pa 103-105 ° C kwa maola awiri, kenako ndikusunthani. mu desiccator, mulole kuziziritsa kutentha kwa chipinda, ndi kulemera kwake , mobwerezabwereza kuyanika, kuzizira, ndi kulemera mpaka kusiyana kwa kulemera pakati pa zolemera ziwirizo ndi ≤ 0.4mg. ndi
5. Werekezerani:
Zolimba zoyimitsidwa (mg/L) = [(AB)×1000×1000]/V
Mwachidule: A—— nembanemba yolimba + yoyimitsidwa ndi kulemera kwa botolo (g)
B——Membrane ndi kulemera kwa botolo (g)
V——chitsanzo cha madzi
6.1 Kugwiritsa ntchito njirayi Njirayi ndi yoyenera kutsimikizira zolimba zoyimitsidwa m'madzi onyansa.
6.2 Kulondola (kubwerezabwereza):
Kubwerezabwereza: Wofufuza yemweyo mu zitsanzo za labotale zitsanzo za 7 za mlingo womwewo wa ndende, ndipo kusiyana kwachibale (RSD) kwa zotsatira zopezedwa kumagwiritsidwa ntchito kufotokoza kulondola; RSD≤5% imakwaniritsa zofunikira.