L-Valine CAS 72-18-4 (H-Val-OH) Assay 98.5 ~ 101.0% Babban Ingancin Factory

L-Valine (H-Val-OH) (CAS: 72-18-4) AJI 97 Hanyar Gwaji
Ganewa: Kwatanta nau'in infrared na samfurin tare da ma'auni ta hanyar fayafai bromide.
Takamaiman Juyawa [α] 20/D: Samfurin Busasshen, C=8, 6mol/L HCl
Halin Magani (Maɗaukaki): 0.5g a cikin 20ml na H2O, spectrophotometer, 430nm, 10mm kauri.
Chloride (Cl): 0.7g, A-1, ref: 0.40ml na 0.01mol/L HCl
Ammonium (NH4): B-2
Sulfate (SO4): 1.2g, (1), ref: 0.50ml na 0.005mol/L H2SO4
Iron (Fe): 1.5g, (2), Ref: 1.5ml na Iron Std.(0.01mg/ml)
Karfe masu nauyi (Pb): 2.0g, (2), Ref: 2.0ml na Pb Std.(0.01mg/ml)
Arsenic (As2O3): 2.0g, (2), ref: 2.0ml na As2O3 Std.
Sauran Amino Acids: Tsarma ammonia R2 Samfurin Gwajin: 50μg, F-6-a, sarrafawa: L-Tyr 0.25μg
Asarar bushewa: a 105 ℃ na 3 hours.
Residue on Ignition (Sulfated): AJI Test 13
Assay: samfurin bushe, 120mg, (1), 3ml na formic acid, 50ml na glacial acetic acid, 0.1mol/L HCLO4 1ml=11.715mg C5H11NO2
Gwajin pH: 1.0g a cikin 20ml na H2O

L-Valine (H-Val-OH) (CAS: 72-18-4)Hanyar Gwajin JP16
L-Valine, lokacin da aka bushe, ya ƙunshi ƙasa da 98.5% na C5H11NO2.
Bayanin L-Valine yana faruwa azaman farin lu'ulu'u ko foda crystalline.Ba shi da wari ko kuma yana da ƙamshin halaye, kuma yana da ɗanɗano mai ɗanɗano kaɗan, wanda ya zama ɗaci.
Yana narkewa da yardar kaina a cikin formic acid, mai narkewa cikin ruwa, kuma a zahiri baya narkewa a cikin ethanol (95).
Yana narke a cikin dilute hydrochloric acid.
Identification Ƙayyade nau'in shayarwar infrared na L-Valine, wanda aka bushe a baya, kamar yadda aka umarce shi a cikin hanyar faifan faifan potassium bromide a ƙarƙashin Infrared Spectrophotometry <2.25>, kuma kwatanta bakan tare da Spectrum Reference: duka bakan suna nuna irin ƙarfin sha a lambobi iri ɗaya. .
Juyawa na gani <2.49> [a] 20D: +26.5°~+29.0° (bayan bushewa, 2 g, 6 mol/L hydrochloric acid TS, 25 ml, 100 mm).
pH <2.54> Narke 0.5 g na L-Valine a cikin 20 ml na ruwa: pH na wannan maganin yana tsakanin 5.5 da 6.5.
Tsaftace (1) Tsaftace da launi na bayani Narke 0.5 g na L-Valine a cikin 20 ml na ruwa: bayani a bayyane yake kuma mara launi.
(2) Chloride <1.03> -Yi gwajin tare da 0.5 g na L-Valine.Shirya maganin sarrafawa tare da 0.30 ml na 0.01mol/L hydrochloric acid VS (ba fiye da 0.021%) ba.
(3) Sulfate <1.14> -Yi gwajin tare da 0.6 g na L-Valine.Shirya maganin sarrafawa tare da 0.35 ml na 0.005mol / L sulfuric acid VS (ba fiye da 0.028%) ba.
(4) Ammonium <1.02> -Yi gwajin tare da 0.25 g na L-Valine.Shirya maganin sarrafawa tare da 5.0 ml na Standard Ammonium Solution (ba fiye da 0.02%) ba.
(5) Karfe masu nauyi <1.07> - Ci gaba da 1.0 g na L-Valine bisa ga Hanyar 1, kuma yi gwajin.Shirya maganin sarrafawa tare da 2.0 ml na Maganin Jagorar Jagora (ba fiye da 20 ppm ba).
(6) Arsenic <1.11> - Ci gaba tare da 1.0g na L-Valine, shirya maganin gwajin bisa ga Hanyar 2, kuma gwada gwajin (ba fiye da 2 ppm ba).
(7) Abubuwan da ke da alaƙa-Narke 0.10 g na L-Valine a cikin 25mL na ruwa, kuma amfani da wannan maganin azaman maganin samfurin.Pipet 1 ml na maganin samfurin, kuma ƙara ruwa don yin daidai 50 ml.Pipet 5 ml na wannan maganin, ƙara ruwa don yin daidai 20 ml, kuma amfani da wannan maganin azaman daidaitaccen bayani.Yi gwajin tare da waɗannan mafita kamar yadda aka umurce su ƙarƙashin Thin-Layer Chromatography <2.03>.Spot 5mL kowane samfurin samfurin da daidaitaccen bayani akan farantin gel silica don chromatography na bakin ciki.Ƙirƙirar farantin tare da haɗin 1-butanol, ruwa da acetic acid (100) (3: 1: 1) zuwa adistance na kimanin 10 cm, kuma bushe farantin a 80 ℃ na minti 30.Fesa a ko'ina wani bayani na ninhydrin a acetone (1 a 50) a kan farantin, da kuma zafi a 80 ℃ na 5 minutes: da spots wanin babba tabo daga samfurin bayani ba su fi tsanani fiye da tabo daga misali bayani.
Asarar bushewa <2.41> Bai wuce 0.30% ba (1 g, 105 ℃, 3 hours).
Ragowa akan kunnawa <2.44> Bai wuce 0.1% ba (1 g).
Assay Yi nauyi daidai game da 0.12 g na L-Valine, wanda aka bushe a baya, kuma ya narke a cikin 3 ml na formic acid, ƙara 50 ml na acetic acid (100), da titrate <2.50> tare da 0.1 mol/L perchloric acid VS (titration mai ƙarfi) .Yi ƙudiri mara kyau, kuma a yi duk wani gyara da ya dace.
Kowane ml na 0.1 mol/L perchloric acid VS 11.72 MG na C5H11NO2
Kwantena da Akwatunan ajiya - Kwantena masu tsauri.