Zog:
Sodium Metabisulfite yog ib qho khoom noj uas siv los ntxiv rau hauv cov khoom noj. Ntxiv nrog rau nws cov tshuaj dawb, nws kuj muaj cov haujlwm hauv qab no:
1) Qhov ua haujlwm ntawm Anti Browning
Enzymatic Browning feem ntau tshwm sim hauv cov txiv hmab txiv ntoo, qos yaj ywm, Sodium Metabisulfite yog ib tus neeg txo qis, qhov kev ua ntawm polyphenol oxidase muaj cov tshuaj tiv thaiv muaj zog, 0.0001% ntawm leej faj sulfur tuaj yeem txo 20% ntawm cov enzyme kev ua si, 0.001% ntawm sulfur dioxide tuaj yeem cuam tshuam tag nrho enzyme kev ua si, tuaj yeem tiv thaiv enzymatic Browning; Tsis tas li ntawd, nws tuaj yeem haus cov pa oxygen rau cov zaub mov noj thiab ua lub luag haujlwm ntawm deoxygenation. Sulfite nyob rau hauv kev sib txuas ntxiv nrog cov piam thaj, tiv thaiv cov piam thaj hauv cov zaub mov thiab cov amino acid glycoammonia cov tshuaj tiv thaiv, yog li muaj qhov cuam tshuam los tiv thaiv Browning.
2) Antiseptic siv
Sulfurous acid tuaj yeem ua lub luag haujlwm ntawm cov kua qaub ua kom muaj kev tiv thaiv, cov kua dej sulfurous acid yog ntseeg tias yuav txwv tsis pub muaj poov xab, pwm, kab mob.Undissociated sulfite tau tshaj tawm txog 1000 zaug ntau dua li bisulfite hauv inhibiting E. coli.It yog 100-500 lub sijhawm muaj zog rau npias poov xab thiab 100 lub sij hawm muaj zog tuaj pwm. Thaum cov leej faj dioxide yog acidic, nws muaj qhov ua kom muaj zog tshaj plaws ntawm kev nqa cov kab mob me me.
3） Muaj nuj nqi ntawm cov neeg ua hauj lwm xoob
Yuav siv tau raws li cov khoom seem ntawm cov neeg sawv cev xoob.
3) Antioxidant nyhuv.
Sulfite muaj qhov ua tau zoo tshaj plaws oxidation.Because sulfurous acid yog qhov ua kom muaj zog txo qis, tuaj yeem haus cov pa oxygen hauv cov txiv hmab txiv ntoo thiab zaub ua haujlwm, inhibit qhov kev ua ntawm oxidase, oxidation rhuav tshem cov vitamin C hauv kev tiv thaiv cov txiv hmab txiv ntoo thiab zaub ua tau zoo.
Cov txheej txheem ntawm kev ua ntawm sodium metabisulfite:
Bleach raws li nws hom kev txiav txim siab tuaj yeem muab faib ua ob pawg: Oxidation Bleach thiab Txo Bleach.Sodium metabisulfite yog ib qho kev rov ua kom rov dawb.
Sodium metabisulfite tuaj yeem ntxuav los ntawm kev txo cov xim.Qhov xim ntawm cov organic feem ntau yog muab los ntawm cov pawg chromaticity uas muaj nyob hauv lawv cov lwg me me.Hair xim pawg muaj cov xim tsis tseem ceeb, txo cov tshuaj kom tso tawm hydrogen atoms tuaj yeem ua kom plaub hau xim pawg uas muaj nyob hauv daim ntawv cog lus tsis raug tso rau hauv ib leeg nyiaj, organic teeb meem yuav plam xim. Qee yam zaub mov Browning yog tshwm sim los ntawm qhov muaj nyob ntawm ferric ions, ntxiv kom txo cov tshuaj pleev tuaj yeem tuaj yeem ua kom muaj cov tshuaj lom rau hauv ferric ions, tiv thaiv cov zaub mov Browning.
Sodium metabisulfite yog ntxuav los ntawm kev ntxiv ntawm sulfites. Anthocyanin thiab qab zib tuaj yeem ntxuav los ntawm cov tshuaj tiv thaiv ntxiv. Qhov tshuaj tiv thaiv no thim rov qab, thiab kua qaub sulfurous tuaj yeem tshem tawm los ntawm cua kub lossis acidification, thiaj li hais tias anthocyanin tuaj yeem rov ua dua tshiab thiab nws cov xim liab tau rov qab los.
Hauv kev ua lag luam biscuit, sodium metabisulfite yog siv los ua lub khob noom cookie biscuit tsis raug. Ua ntej siv, nws tau npaj rau 20% kev daws, thiab tom qab ntawd ntxiv rau lub khob noom cookie tsis paub qab hau nyob rau lub sijhawm sib txawv thaum ua lub khob noom cookie ua cov txheej txheem.Ua rau cov sulfur dioxide tso tawm los ntawm sodium pyrosulphate nyob rau hauv cov txheej txheem kev ua khob noom cookie, lub zog thiab tawv ntawm cov hmoov nplej gluten. yog cov loj, thiab ib qho me me ntawm qhov sib ntxiv tuaj yeem tiv thaiv qhov deformation ntawm cov khoom noj biscuit vim ntau dhau zog. Cov khob noom cookie muaj peev xwm ntxiv tau raws li lub zog ntawm hmoov, thiab feem ntau nyob hauv qhov feem pua ntawm cov roj thiab qab zib crisp khob noom cookie thiab kua txiv qab zib tawg. kom deb li deb tau siv tsis tas, qhov no yog vim tias qhov sib ntxiv ntawm cov roj thiab qab zib nws tus kheej tau tiv thaiv cov gluten protein dej kom nthuav dav, tiv thaiv kev tsim cov ntau ntawm gluten, tsis tas yuav ntxiv sodium metabisulfite.
Cov ntsiab lus rau kev saib xyuas hauv kev siv sodium metabisulfite:
Cov ntsiab lus hauv qab no yuav tsum raug sau tseg thaum siv sodium metabisulfite hauv cov zaub mov tiav:
1) sodium metabisulfite reductive tshuaj dawb tus neeg sawv cev, nws txoj kev daws teeb meem tsis ruaj khov thiab tsis khov, tam sim no siv, los tiv thaiv sulfite tsis khov thiab volatilization.
2) thaum muaj cov hlau ions hauv cov zaub mov, cov sulfite muaj peev xwm ua tau oxidized; Nws kuj tseem tuaj yeem ua rau cov xim muaj hlau oxidation ntau ntxiv, yog li txo cov hauj lwm zoo ntawm cov tshuaj kom dawb. Yog li ntawd, cov hlau chelators kuj tseem siv thaum lub sijhawm ua haujlwm.
3) kev siv cov khoom siv sulfite tshuaj dawb, vim tias ploj ntawm cov leej faj dioxide thiab cov xim yooj yim, yog li feem ntau hauv cov zaub mov muaj ntau tshaj li cov khoom noj sulfur dioxide, tab sis cov khoom seem yuav tsum tsis pub tshaj tus qauv
4) Sulfuric acid tsis tuaj yeem tiv thaiv qhov kev ua haujlwm ntawm pectinase, uas yuav ua kom puas cov cohesion ntawm pectin. Tsis tas li ntawd, sulfurous acid infiltration rau hauv cov kua txiv hmab txiv ntoo, kev ua tiav ntawm cov txiv hmab txiv ntoo tawg, thiaj li yuav tshem tawm tag nrho cov leej faj dioxide, yog li cov txiv hmab txiv ntoo tshwj xeeb nrog sulfurous acid tsuas yog tsim nyog rau kev ua rau jam, txiv hmab txiv ntoo qhuav, kua txiv hmab txiv ntoo, kua txiv qab zib, tsis tuaj yeem siv ua raw khoom rau cov kaus poom.
5) Sulfites tuaj yeem rhuav tshem thiamine, yog li nws tsis yooj yim rau hauv cov khoom noj ntses .6) Sulfites yog yooj yim rau cov tshuaj tiv thaiv nrog aldehydes, ketones, protein, thiab lwm yam.
Tiam sis thiab Kev Loj Hlob:
Hauv cov khoom lag luam niaj hnub ua teb, vim hais tias cov khoom noj qee zaum tsim cov xim tsis tsim nyog, lossis qee yam khoom noj khoom noj nyoos vim muaj ntau yam, kev thauj mus los, txoj kev khaws cia, xaiv lub sijhawm ntawm qhov paub tab, xim yog txawv, uas yuav ua rau cov xim kawg khoom tsis yog zoo ib yam thiab cuam tshuam rau cov zaub mov zoo.Yog li ntawd, niaj hnub no ntau thiab ntau dua los saib xyuas cov zaub mov kom zoo, kev txhim kho cov zaub mov xa tuaj tsis pub dawb yog qhov tsis muaj tseeb, tau kawg, yog hom zaub mov xa tuaj tsis zoo, kev txhim kho sodium metabisulfite kuj tseem zoo. metabisulfite muaj ntau lub zog, tsis tsuas yog lub luag haujlwm ntawm tshuaj dawb, tab sis kuj tseem muaj lub luag haujlwm ntawm oxidation, lub luag haujlwm ntawm kev tiv thaiv enzymatic Browning, lub luag haujlwm ntawm antisepsis, nws cov txheej txheem ntau lawm yog yooj yim thiab yooj yim, yog li kev ua kom muaj kev nyab xeeb ntawm cov zaub mov , sodium metabisulfite qhov chaw loj hlob yog qhov loj heev.
Sijhawm sijhawm: Lub Ob Hlis-02-2021