L-Cysteine ​​Hydrochloride Monohydrate CAS 7048-04-6 Assay 98.5 ~ 101.0% (Titration on Dried Basis) Factory

L-Cysteine ​​Hydrochloride Monohydrate (CAS: 7048-04-6) Usoro ule AJI97
Nchọpụta: Tụlee ụdị nnabata infrared nke ihe nlele ahụ na nke ọkọlọtọ site na usoro diski bromide potassium.
Ntụgharị a kapịrị ọnụ [α] D20: nlele akpọnwụwo, C=8, 1mol/L HCl
Ọnọdụ Ngwọta (Nfefe): 1.0g na 10ml nke H2O, spectrophotometer, 430nm, 10mm cell ọkpụrụkpụ.
Chloride (Cl): 350mg, B-2
Ammonium (NH4): A-1
Sulfate (SO4): 1.2g, (1), ntụgharị: 0.50ml nke 0.005mol/L H2SO4
Ígwè (Fe): 1.5g, ntụgharị: 1.5ml nke Ígwè Std.(0.01mg/ml)
Ọla dị arọ (Pb): 2.0g, (1), pH=7, ntụgharị: 2.0ml nke Pb Std.(0.01mg/ml)
Arsenic (As2O3): 2.0g, (1), ntụgharị: 2.0ml nke As2O3 Std.
Amino acid ndị ọzọ: Nlele ule: 50μg, B-6-a, njikwa;L-Cys·HCl·H2O 0.25μg
Ọnwụ na ihicha: Na oghere, P2O5, na ụlọ okpomọkụ maka awa 20.
Ihe fọdụrụ na mgbanye (Sulfated): AJI Test 13
Nyocha: Mịrị amị sample, 250mg, 0.05mol/L I2 1ml=15.762mg C3H7NO2S·HCl
Nnwale pH: 1.0g na 100ml nke H2O

L-Cysteine ​​Hydrochloride Monohydrate (CAS: 7048-04-6) Ule ule USP35
Nkọwa
Cysteine ​​​​hydrchloride bụ L-Cysteine ​​Hydrochloride Monohydrate ma nwere NLT 98.5% na NMT 101.5% nke L-Cysteine ​​Hydrochloride (C3H7NO2S·HCl), gbakọọ na ntọala akpọnwụwo.
Nchọpụta
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ASSAY
Usoro
Ihe atụ: 250 mg nke Cysteine ​​​​Hydrochloride
Oghere: Gaa n'ihu dị ka a gwara ya na nyocha na-enweghị ihe nlele.
Titrimetric usoro
(Lee Titrimetry <541>)
Ụdị: Titration fọdụrụnụ
Titrant: 0.1 N ayodiin VS
Azụ titrant: 0.1 N sodium thiosulfate VS
Nchọpụta njedebe: Anya
Nyocha: Nyefee ihe nlele ahụ na flask iodine.Tinye 20.0 ml mmiri na 4 g nke potassium iodide, na mix.Mee ka ngwọta dị jụụ n'ime mmiri ịsa ahụ, ma tinye 5 ml nke 3 N hydrochloric acid na 25.0 ml nke 0.1 N iodine VS.Fanye ihe nkwụsị ahụ, ma kwe ka ọ guzoro n'ọchịchịrị maka nkeji 20.Titrate ngafe iodine na Back titrant.Tinye 3 ml nke kpakpando ch TS ka ebe njedebe na-eru nso.Kwa ụdị mkpebi nke oghere.Gbakọọ pasent nke cysteine ​​hydrochloride (C3H7NO2S·HCl) n'ime ihe nlele emere:
Nsonaazụ = {[(VB - VS) × N × F]/W} × 100
VB = Azụ titrant olu nke oghere (mL) na-eri.
VS = Azụ titrant olu nke Sample (mL) na-eri.
N = ezigbo ọnọdụ nke azụ titrant (mEq/ml)
F= ihe nhata, 157.6 mg/mEq
W= Nlereanya arọ (mg)
Usoro nnabata: 98.5% ~ 101.5% na ntọala akpọnwụwo
IHE adịghị ọcha
Ihe fọdụrụ na mgbanye <281>: NMT 0.4%
chloride na sulfate, sulfate <221>
Ngwọta ọkọlọtọ: 0.10 ml nke 0.020 N sulfuric acid
Ihe atụ: 0.33 g nke Cysteine ​​​​Hydrochloride
Usoro nnabata: NMT 0.03%
IRON <241>: NMT 30ppm
Ọla dị arọ, Usoro I <231>: NMT 15ppm
Ngwakọta ejikọtara
Ngwọta N-Ethylmaleimide: 40 mg / ml nke N-ethylmaleimide na mmanya
Ọkọlọtọ ngwaahịa ngwọta: Gbarie 20 mg nke USP L-Cysteine ​​Hydrochloride RS na 10.0 ml mmiri.Tinye 10.0 ml nke N-Ethylmaleimide ngwọta, na mix.Kwe ka ngwọta guzoro maka 5 min tupu iji ya.
Ọkọlọtọ ngwọta: 0.05 mg/mL si Standard ngwaahịa ngwọta na mmiri.[IHE-Ngwọta a nwere ntinye uche ya na 0.5% nke ngwọta Sample.]
Ngwọta ndabara sistemu: Nyefee 10 mg nke USP L-Tyrosine RS na 10 mL nke ọkọlọtọ ngwaahịa ọkọlọtọ na flask volumetric 25-mL.Tinye mmiri na olu.
Ihe ngwọta ngwaahịa: Nyefee 0,2 g nke Cysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​Hysteine ​​​​hydrochloride, gbazee, gbazee ma gbanye ya na mmiri ka ọ bụrụ olu.
Ngwọta nlele: Na 5.0 ml nke ihe ngwọta ngwaahịa Sample tinye 5.0 ml nke N-Ethylmaleimide ngwọta, na mix.Kwe ka ngwọta guzoro maka 5 min tupu iji ya.
Sistemu chromatographic (Lee Chromatography <621>, Chromatography nke dị obere.)
Ụdị: TLC
Adsorbent: 0.25-mm oyi akwa nke chromatographic silica gel ngwakọta
Olu ngwa: 5μL
Sistemụ ihe mgbaze na-emepe emepe: mmanya butyl, glacial acetic acid, na mmiri (3:1:1)
Mgbasa reagent: 2 mg/mL nke ninhydrin na ngwakọta nke mmanya butyl na 2N acetic acid (95:5)
Sistemu kwesịrị ekwesị
Ihe achọrọ dabara adaba: chromatogram nke ngwọta dabara adaba sistemụ na-egosipụta ntụpọ abụọ kewapụrụ nke ọma.
Nyocha
Nlereanya: Ngwọta ọkọlọtọ, Ngwọta dabara adaba sistemụ, yana ngwọta nlele.
Mgbe ịsachara efere ahụ ikuku, fesaa ya na reagent Spray, wee kpoo ọkụ n'etiti 100 ° na 105 ° maka 15 min.Nyochaa efere n'okpuru ọkụ ọcha.
Usoro nnabata: Ebe ọ bụla nke abụọ nke ngwọta Sample adịghị ibu ma ọ bụ sie ike karịa isi ntụpọ nke Standard Solution.
Ihe adịghị ọcha n'otu n'otu: NMT 0.5%
Mkpokọta adịghị ọcha: NMT 2.0%
Nnwale akọwapụtara
Ntụgharị anya, ntụgharị a kapịrị ọnụ <781S>
Ngwọta nlele: 80 mg/mL na 6 N hydrochloric acid
Ụkpụrụ nnabata: +5.7° ruo +6.8°
Ịkpọ nkụ <731>: Kpochapụ ihe nlele na ụlọ okpomọkụ na nrụgide na-erughị 5 mm nke mer cury maka awa 24: ọ na-efunahụ 8.0% ~ 12.0% nke ịdị arọ ya.
NKWUO GBASARA YA
Nkwakọ ngwaahịa na nchekwa: Chekwaa n'ime akpa mechiri emechi nke ọma.
Ụkpụrụ ntụaka USP <11>
USP L-Cysteine ​​​​Hydrochloride RS
USP L-Tyrosine RS