Ascorbic acid
CAS Nr.: 50-81-7
Lub cev thiab tshuaj muaj zog
Ascorbic acid yog dawb mus rau lub teeb daj crystalline hmoov, tsw thiab qaub, nrog ib tug melting point ntawm txog 190 degree, uas maj mam tig xim av tom qab raug rau lub teeb. Nws yog qhov ruaj khov heev nyob rau hauv lub xeev qhuav, tab sis cov ntsiab lus hauv cov tshuaj yuav txo tau sai heev nyob rau hauv lub xub ntiag ntawm huab cua. pH 3. Nws ruaj khov ntawm 5 ~ 4.5. 1g yog soluble hauv 5ml dej thiab 30ml ethanol, tab sis insoluble nyob rau hauv chloroform, ether, thiab lwm yam organic solvents. Nws yog reductive thiab yooj yim rau oxidized rau dehydroascorbic acid.
Toxicological hauv paus
② LD50: qhov ncauj qhov ncauj ntawm nas yog ntau dua 5g / kg (BW).
②ADI: 0-15mg/kg (BW) (FAO/WHO, 1994).
③GRAS: FDA-21CFR 182.5013,182.3013,182.3401,182.8013.
Daim ntawv thov
Antioxidant, hmoov kho tus neeg sawv cev
Raws li cov khoom noj antioxidant, ascorbic acid tuaj yeem siv rau hauv cov hmoov nplej nrog ntau npaum li cas ntawm {{0}}.2g/kg; Hauv cov txiv hmab txiv ntoo tshiab los yog txiav ua ntej, tev, txiav, lossis txiav cov zaub, qhov siab tshaj plaws yog 5.0g / kg; Hauv cov txiv hmab txiv ntoo thiab zaub kua txiv hmab txiv ntoo (pulp), tus nqi tsim nyog siv tau raws li kev xav tau ntau lawm. Raws li cov tshuaj tiv thaiv antioxidant, ascorbic acid kuj tuaj yeem siv rau hauv txhua yam khoom noj (tshwj tsis yog cov khoom noj hauv Daim Ntawv Ntxiv 2) thiab tuaj yeem siv rau qhov tsim nyog raws li kev xav tau ntau lawm.
Cov khoom no yog siv los ua antioxidant hauv ntau yam khoom noj, suav nrog cov txiv hmab txiv ntoo ua tiav, zaub, nqaij, ntses, txiv hmab txiv ntoo qhuav, dej qab zib, thiab lwm yam. Cov tshuaj ntau npaum li cas hauv ntau yam zaub mov feem ntau yog {{0}}}{{11 }}1 ~ 1.5g / kg, lossis ntau dua. Ntxiv 1g / L ntawm ascorbic acid tov rau roj lossis txiv hmab txiv ntoo tuaj yeem ncua nws cov txheej txheem oxidation los yog tswj nws cov xim thiab tsw; Nyob rau hauv cov dej haus, ascorbic acid yog siv los ua cov pa oxygen scavenger los tiv thaiv cov dej haus los ntawm kev hloov saj lossis xim; L-ascorbic acid muaj kev ua haujlwm ntawm kev noj zaub mov zoo, saib 5.2 hauv Tshooj 5. Lwm yam kev siv: txiv qaub roj 0.1g/kg; Cov txiv hmab txiv ntoo hauv tub yees 0.3 ~ 0.45g/kg; Cov txiv hmab txiv ntoo kaus poom {{20}}.25 ~ 0.4g/kg; Cov zaub hauv kaus poom 1g / kg; Cov nqaij tshiab thiab ua tiav 0.2 ~ 0.5g / kg; Mis hmoov 0.2 ~ 2G / kg.
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