L-Cystine CAS 56-89-3 (H-Cys-OH)2 Mayeso 98.5~101.0% (Titration) Factory High Quality

TANTHAUZO
Cystine ili ndi NLT 98.5% ndi NMT 101.5% ya C6H12N2O4S2, monga L-Cystine, yowerengedwa pa zouma.
CHIZINDIKIRO
A. KUYAMBIRA KWA INFRARED <197K>
B. KUSINTHA KWA MAONEdwe, Kuzungulira Kwachindunji <781S>: -215 mpaka -225, kutsimikiziridwa pa 20 °
Yankho lachitsanzo: 20 mg/mL, mu 1 N hydrochloric acid
C. Mtengo wa RF wa malo ofunika kwambiri a Sample solution pakuyesa kwa Organic Impurities ndi wofanana ndi wa Standard solution.
ZOYESA
NTCHITO
Chitsanzo cha yankho: Chotsani pafupifupi 0,1 g wa Cystine mu botolo loyimitsidwa ndi galasi, ndi kusungunula mu osakaniza a 2 mL a dilute sodium hydroxide (1 mu 20) ndi 10 ml ya madzi.Onjezerani 10 mL wa potaziyamu bromide solution (200 g/L m'madzi), 50.0 mL wa 0.1 N potaziyamu bromate VS, ndi 15 mL wa dilute hydrochloric acid (17 mu 100).
Nthawi yomweyo lowetsani choyimitsira mu botolo, ndikuziziritsa m'madzi osambira.Lolani kuyima motetezedwa ku kuwala kwa mphindi 10.
Titrimetric system
(Onani Titrimetry <541>)
Mawonekedwe: Matchulidwe otsalira
Kukula: 0.1 N potaziyamu bromate VS
Back-titrant: 0.1 N sodium thiosulfate VS
Kuzindikira komaliza: Colorimetric
Kufanana: ML iliyonse ya 0.1 N potassium bromate VS ndi yofanana ndi 2.403 mg ya C6H12N2O4S2 pa zouma.
Kusanthula: Onjezani 1.5 g wa ayodini wa potaziyamu, ndipo pambuyo pa 1min, titrate ndi 0,1 N sodium thiosulfate VS, pogwiritsa ntchito wowuma TS monga chizindikiro.Chitani chitsimikiziro chopanda kanthu, ndipo pangani kukonza kulikonse kofunikira.
Njira zolandirira: 98.5% ~ 101.5% pazowuma
ZOCHITSA
Zowonongeka Zachilengedwe
ZOKHALA PA KUYATSA <281>: NMT 0.1%
CHLORIDE NDI SULFATE, Chloride <221>: NMT 200 ppm.Gawo la 0,7-g likuwonetsa chloride yochulukirapo kuposa 0.40 ml ya 0.01 N hydrochloric acid.
CHLORIDE NDI SULFATE, Sulfate <221> NMT 200 ppm.Gawo la 1.2-g limawonetsa sulphate yochulukirapo kuposa 0,25 ml ya 0.020 N sulfuric acid.
IRON <241>: NMT 10ppm
ZINTHU ZONSE, Njira I <231>: NMT 10ppm
Zowonongeka Zachilengedwe
NTCHITO
Sungunulani kuchuluka kwa USP Cystine RS mu 1 N hydrochloric acid, ndi kusungunula ndi madzi kuti mupeze yankho lodziwika bwino la pafupifupi 0.02 mg/mL.
Yankho lachitsanzo: Sungunulani kuchuluka kwa Cystine mu 1 N hydrochloric acid, ndi kusungunula ndi madzi kuti mupeze yankho lodziwika bwino la 10 mg/mL.
Sungunulani kuchuluka kwa USP Cystine RS ndi USP Arginine Hydrochloride RS mu 1 N hydrochloric acid, ndi kusungunula ndi madzi kuti mupeze yankho lomwe lili ndi ndende yodziwika pafupifupi 0.4 mg/mL iliyonse.
Chromatographic system (Onani Chromatography <621>, Thin-Layer Chromatography.)
Njira: TLC
Adsorbent: 0.25-mm wosanjikiza wa chromatographic silica gel osakaniza
Kuchuluka kwa ntchito: 5μL
Kupanga zosungunulira: Chisakanizo cha ammonia ndi 2-propanol (3:7)
Spray reagent: Sungunulani 0,2 g wa ninhydrin mu 100 ml ya osakaniza a butanol ndi 2 N acetic acid (95:5).
Kusanthula
Zitsanzo: Yankho lokhazikika, yankho lachitsanzo, ndi yankho loyenera la System
Chitani monga mwauzira Chromatography <621>, Thin-Layer Chromatography.Mukayanika mbaleyo, pukutani ndi Spray reagent, ndi kutentha pakati pa 100 ° ndi 105 ° kwa mphindi 15.Yang'anani mbale.Chromatogram yochokera ku System suitability solution imawonetsa mawanga awiri olekanitsidwa bwino.
Njira zolandirira: Malo aliwonse achiwiri kuchokera ku Sample solution siakulu kapena okulirapo kuposa malo oyambira a Standard solution.
Zonyansa zapayekha: NMT 0.2%
Zonyansa zonse: NMT 2.0%
MAYESO AKE
LOSSON PAKUYANTHA <731>: Yanikani chitsanzo pa 105℃ kwa 3 h: imataya NMT 0.2% ya kulemera kwake.
ZOWONJEZERA ZOFUNIKA
KUPAKA NDI KUKUSIKA: Sungani m’zotengera zotsekedwa bwino, ndipo sungani pamalo otenthetsera bwino m’chipinda.
MFUNDO ZA USP REFERENCE <11>
USP Arginine Hydrochloride RS
USP Cystine RS