1. Taw qhia
Vitamin C, tseem hu ua L-ascorbic acid, yog ib qho khoom noj tseem ceeb. Nws yog metabolically tsim nyob rau hauv ntau yam kab mob, tab sis tib neeg yog qhov tseem ceeb tshaj plaws kev zam.
Qhov zoo tshaj plaws paub yog tias tsis muaj cov vitamins no ua rau scurvy. Lub pharmacophore ntawm nws C yog ascorbic acid ion. Hauv cov kab mob muaj sia, nws yog ib qho antioxidant vim tias nws tiv thaiv lub cev los ntawm kev hem thawj ntawm oxidants, thiab nws kuj yog coenzyme.
Vitamin C yog yooj yim soluble nyob rau hauv dej, me ntsis soluble nyob rau hauv ethanol, insoluble nyob rau hauv ether, chloroform, benzene, roj av ether, roj, thiab rog. Cov tshuaj aqueous nthuav tawm cov tshuaj tiv thaiv acidic. Nws tuaj yeem oxidized sai sai rau dehydroascorbic acid hauv huab cua, thiab muaj citric acid zoo li qaub saj. Nws yog ib qho muaj zog txo tus neeg sawv cev, thiab nws yuav maj mam tig mus rau qhov sib txawv ntawm lub teeb daj tom qab khaws cia rau lub sijhawm ntev. Vitamin C feem ntau muaj nyob rau hauv zaub thiab txiv hmab txiv ntoo, tswb kua txob, txiv lws suav, zaub paj thiab ntau yam nplooj tsaus nti thiab zaub qus hauv zaub, citrus, txiv qaub, ntsuab hnub, hawthorn, kiwi, prickly pear, hiav txwv buckthorn thiab lwm yam vitamin C ntsiab lus nyob rau hauv txiv hmab txiv ntoo heev. nplua nuj. Nws ua lub luag haujlwm tseem ceeb hauv oxidation thiab txo qis hauv cellular respiration, uas yog qhov tsim nyog rau nucleic acid synthesis thiab txhawb kev tsim cov qe ntshav liab. Nws kuj tseem tuaj yeem txo Fe3 ntxiv rau Fe2 ntxiv, yog li nws tuaj yeem nqus tau yooj yim los ntawm tib neeg lub cev thiab tseem muaj txiaj ntsig zoo rau kev tsim cov hlwb.
2. Flow Chart
3.Quality Standard
Kev tsom xam Cov ntsiab lus | Specification | Kev tsom xam Kev tshwm sim |
Qhov tshwm sim | Dawb los yog lub teeb daj crystalline hmoov | Ua raws |
Kev txheeb xyuas | Kev pom zoo | Ua raws |
Assay | Ntau dua lossis sib npaug rau 99.0 feem pua | 99.5% ua |
Tshwj xeeb kho qhov muag kev sib hloov | ntxiv 20.5 degree ~ ntxiv 21.5 degree | ntxiv rau 20.9 degree |
Residue ntawm ignition | Tsawg dua los yog sib npaug rau 0. 1 feem pua | 0.02 feem pua |
Heavy Metals (Pb) | Tsawg dua lossis sib npaug li 10mg / kg | 3 mg/kg |
Pb | Tsawg dua lossis sib npaug li 2mg / kg | 2 mg/kg |
Raws li | Tsawg dua lossis sib npaug li 3mg / kg | 3 mg/kg |
Fe | Tsawg dua lossis sib npaug li 2mg / kg | 2 mg/kg |
Cu | Tsawg dua lossis sib npaug li 5mg / kg | 5 mg/kg |
Xaus: Ua raws li tus qauv GB14754-2010 | ||
4.Chromatogram
5.Tsim txoj kev
Kev txiav txim siab txog cov ntsiab lus
5.1 Reagents thiab Solutions
5.1.1 Dilute sulfuric acid tov: 10 feem pua (m/V) tov.
5.1.2 Iodine standard titration Solution (0.1 mol/L): Ntsuas tus nqi tsim nyog ntawm iodine, npaj thiab calibrate raws li txoj kev teev tseg.
5.1.3 Starch indicator solution: noj cov hmoov txhuv nplej siab uas tsim nyog thiab npaj nws raws li txoj kev.
5.2 Kev txiav txim txoj kev
Qhov hnyav txog {{0}}.2 g ntawm cov qauv (qhov tseeb rau u 0002 g), muab tso rau hauv 100 mL iodine volumetric hwj, ntxiv 20 mL ntawm freshly boiled dej txias thiab 25 mL ntawm dilute sulfuric acid. tov kom yaj nws, thiab tam sim ntawd titrate nws nrog tus qauv iodine tov (0.1 mol / L) titration, thaum mus txog qhov kawg point, ntxiv 1 mL ntawm starch qhia tov kom txog rau thaum cov tshuaj tig xiav thiab tsis ploj nyob rau hauv 30s.
5.3 Kev nthuav qhia cov txiaj ntsig kev soj ntsuam
Cov ntsiab lus ntawm vitamin C X1 (%) yog qhia nyob rau hauv huab hwm coj feem pua, uas yuav xam tau raws li cov mis:
V - qhov ntim ntawm iodine txheem titration tov noj los ntawm sample.mL
c1 - molar concentration ntawm iodine txheem titration tov, mol/L;
m1 - qhov loj ntawm tib yam khoom, g;
0.088 06--Qhov loj ntawm vitamin C sib npaug rau 1.00 mL ntawm iodine standard titration tov [c=1.000 mol/LJ, g.
Qhov tshwm sim yuav tsum tau qhia rau ib qhov chaw decimal.
5.4 Kev kam rau siab
Qhov sib txawv ntawm qhov sib txawv ntawm qhov kev txiav txim siab thib ob ntawm txoj kev no yog nyob rau hauv 0.3 feem pua .
6. Muaj nuj nqi
Vitamin C muaj ntau txoj haujlwm thiab pls xa mus rau hauv qab no:
7. Daim ntawv thov
8. Kev Tshawb Fawb Txog Kev Nyab Xeeb thiab Kev Nyab Xeeb
Peb tau ua ntau yam kev ruaj ntseg thiab kev nyab xeeb kawm txog cov khoom no, raws li cov ntaub ntawv ceev ceev thiab kev ruaj ntseg mus sij hawm ntev, nws qhia cov yam ntxwv ruaj khov; raws li kev tshawb nrhiav tsiaj txhu, nws qhia tau tias muaj kev nyab xeeb.
9. Ntawv pov thawj
KONO CHEM CO.LTD tau lees paub los ntawm ISO9001: 2015 los ntawm lub cev muaj ntawv pov thawj.
10.Main Clients
KONO CHEM CO.LTD tau dhau los ua tus tswv cuab tseem ceeb hauv kev muab cov hmoov Mushroom rau lub ntiaj teb nto moo zaub mov, tshuaj thiab tshuaj pleev ib ce manufacturers
11. Exhibitions
Peb ib txwm tuaj koom kev ncaj ncees xws li CPHi, FIC, Vitafoods, Supplyside sab hnub poob thiab nthuav peb lub lag luam nyob rau hauv cov ces kaum ntawm lub ntiaj teb no, thiab xav kom cov neeg nyob rau hauv lub ntiaj teb no tau txais txiaj ntsig los ntawm Kono Chem Co., ltd.
12.Cov neeg siv lus pom
Peb muaj Tebchaws USA warehouse hauv Miami thiab EU warehouse hauv ltalis, peb muaj cov khw muag khoom online hauv Alibaba, uas tuaj yeem lav qhov yooj yim ntawm kev hloov pauv, cov tswv yim no kuj tau txais tos los ntawm peb cov neeg siv khoom.
Cim npe nrov: L(plus)-Ascorbic Acid/Vitamin C Powder 50-81-7, manufacturers, lwm tus neeg, Hoobkas, lag luam wholesale, yuav, nqe, zoo tshaj plaws, tej, kev muag khoom
