.
1. Ho hanyetsa ka mokhoa o babatsehang ho litšila le bokhoni bo botle ba ho thibela acid le alkali.
2. Tharollo e na le melemo ea ho sebetsa habonolo, mefuta e mengata ea mekhoa ea ts'ebetso, ha ho hlokahale ho fetola pH khafetsa.
3. Thibela boom ea ho tiisa hore e se ke ea etsahala.
4. Ka mor'a phekolo ea ho tiisa, e ka ntlafatsa ho thatafala ha holim'a metsi le ho phatsima ha litlaleho tsa aluminium.
Cold Tiiso Additive | Metsi a deionized |
5~5.5g/L | Ho leka-lekanya |
Ni2+ | F- | pH | Mocheso | Nako | Tshebediso |
0.9~1.3g/L | 0.4~0.6g/L | 5.5~6.5 | 22 ~ 28 ℃ | 1μm/1.3mins | 0.9~1.5kg/T |
1. Etsa qeto ea likhakanyo tsa Ni, F le pH, li li etse ka har'a mefuta e mengata ea ts'ebetso
2. Laola pH ka ho eketsa dilute acetic acid (hlapolla hydrofluoric acid) kapa hlapolla sodium hydroxide (hlapolla ammonia), boloka pH ya boleng bo pakeng tsa 5.5 le 6.5.
3. Bakeng sa ho fokotsa tšilafalo ea tharollo ea ho hlapa, laola boleng ba metsi le pH ea bateng ea ho hlatsoa ka mokhoa o tiileng, pH e ke ke ea feta 4.5.
Cold Sealing Additive e tiisitsoe ka polybag, 5kg net ka 'ngoe le polybags tse 4 ka lebokoseng, 20kg net ka 'ngoe.E sirelelitsoe ho khanya sebakeng se omileng.
Boikemisetso ba litaba tsa nickel ion (Ni2+).
1. Mehato ea tlhahlobo.
Thala ka nepo 10mL ea mokelikeli oa sinki ka har'a beake e khutlo-tharo ea 250mL, eketsa 50mL ea metsi, 10mL (pH=10) ea chloramine buffer, palo e nyenyane ea 1% violetine, 'me u sisinyehe hantle.Titrate ka tharollo e tloaelehileng ea 0.01mol/L EDTA ho fihlela tharollo e fetoha ho tloha mosehla ho ea ho pherese e le ntlha ea ho qetela, 'me u tlalehe molumo oa tšebeliso ea V.
2. Palo: Nickel(g/L)=5.869 × V × C
V: boholo ba tharollo e tloaelehileng ea EDTA e sebelisoang ka limililithara (mL)
C: khatello ea molar ea tharollo e tloaelehileng ea EDTA (mol/L)
1. Tokisetso ea F- standard tharollo
① Tharollo e tloaelehileng e nang le F-concentration ea 5g/L: Boima bo nepahetseng ba 11.0526g NaF (Analytical Reagent, e omisitsoeng ka ontong ka 120 ° C bakeng sa 2h, boloka ka har'a desiccator e nang le botlolo ea boima bakeng sa tšebeliso, e nepahetseng ho isa ho 0.0001g ha u le boima) ho qhaqha Ka metsi a manyenyane a nang le distilled, fetisetsa ho 1000mL volumetric flask, hlapolla ho letšoao, 'me u sisinyehe hantle.
② Tharollo e tloaelehileng e nang le F-concentration ea 0.1g/L: Pipette 10mL ea tharollo e tloaelehileng e nang le F-concentration ea 5g/L ka folakeng ea volumetric e ka holimo ho 500mL ea volumetric flask, hlapolla letšoao, 'me u boloke ka har'a botlolo ea polyethylene.
③ Lokisetsa litharollo tse tloaelehileng ka F-concents ea 0.2-1 g/L joalokaha ho hlalositsoe ka holimo.
2. Tokisetso ea Total Ionic Strength Adjusting Buffer Solution (TISAB)
Nka hoo e ka bang 500mL ea metsi a qhibilihisitsoeng 'me u a kenye ka bekeng ea khalase e hloekileng ea 1L, eketsa 57mL ea glacial acetic acid, ebe u eketsa 58.5g ea sodium chloride le 12g ea sodium citrate ho lokisa le ho qhala ka ho feletseng, ebe u sebelisa analytically pure sodium hydroxide ho ikamahanya le pH = 5.0 ~ 5.5, hlapolla ho 1L ka metsi a hloekisitsoeng.
3. F- Standard curve drawing
① Pipette 2mL ea tharollo e tloaelehileng e nang le motsoako oa 0.1g/L ka bekeng ea polasetiki ea 100mL, ebe o eketsa tharollo ea 20mL ea TISAB, e kenngoe ka makenete, e sisinyehe ka matla a khoheli, kenya electrode ea oksijene le electrode ea referense ka ho latellana. 3min, emela lilemo tse 30, 'me u bale bokhoni ba tekano Ex;
②Sebelisa mokhoa o ts'oanang ho lekanya boleng bo ka bang teng ba Ex ea tharollo e tloaelehileng eo mohopolo oa eona oa F e leng 0.2~1g/L, 'me u hlopha mohopolo ho tloha tlase ho ea holimo.Leqepheng la kerafo, taka lekhalo le tloaelehileng la EF le nang le bokhoni ba E e le sehokahanyi le mohopolo oa F joalo ka abscissa.
4. Mokhoa oa ho etsa qeto
Ka nepo, pipette 20mL ea mokelikeli oa sinki ka beakeng ea 100mL, eketsa 20mL ea kakaretso ea matla a ionic (TISAB), tsosa ka matla a khoheli bakeng sa metsotso e 3, 'me u lekanye ka ho toba phapang e ka bang teng mv ka electrode ea fluorine.Fumana litaba tsa fluorine tse tsamaellanang le m setšoantšong sa fluorine-mokhoa oa phapang e tloaelehileng ea li-electrode diagram .
Mekhoa ea ts'ebetso
Ho bataSehlomathiso sa ho tiisa | Nickelion | Fluoride | PH | mocheso |
0.9~1.3g/L | 0.4 - 0.6g/L | 5.5-6.5 | 22 ~ 28℃ |