L-Valine CAS 72-18-4 (H-Val-OH) Chiyero 98.5~101.0% Factory High Quality

L-Valine (H-Val-OH) (CAS: 72-18-4) AJI 97 Test Method
Kuzivikanwa: Enzanisa infrared absorption spectrum yemuenzaniso neiyo yechiyero ne potassium bromide disc nzira.
Chaiyo Kutenderera [α]20/D: Yakaomeswa Sample, C=8, 6mol/L HCl
State of Solution (Transmittance): 0.5g mu20ml yeH2O, spectrophotometer, 430nm, 10mm sero ukobvu.
Chloride (Cl): 0.7g, A-1, ref: 0.40ml ye0.01mol/L HCl
Ammonium (NH4): B-2
Sulfate (SO4): 1.2g, (1), ref: 0.50ml ye0.005mol/L H2SO4
Simbi (Fe): 1.5g, (2), ref: 1.5ml yeIron Std.(0.01mg/ml)
Heavy Metals (Pb): 2.0g, (2), ref: 2.0ml yePb Std.(0.01mg/ml)
Arsenic (As2O3): 2.0g, (2), ref: 2.0ml yeAs2O3 Std.
Mamwe maAmino Acids: Dilute ammonia R2 Test Sample: 50μg, F-6-a, control: L-Tyr 0.25μg
Kurasikirwa paKuomesa: pa105 ℃ kwemaawa matatu.
Residue paIgnition (Sulfated): AJI Muedzo 13
Chiyero: Sample yakaomeswa, 120mg, (1), 3ml yeformic acid, 50ml yeglacial acetic acid, 0.1mol/L HCLO4 1ml = 11.715mg C5H11NO2
pH Muedzo: 1.0g mu20ml yeH2O

L-Valine (H-Val-OH) (CAS: 72-18-4)JP16 Test Method
L-Valine, kana yakaomeswa, ine kwete pasi pe98.5% yeC5H11NO2.
Tsanangudzo L-Valine inoitika semakristasi machena kana crystalline poda.Haina hwema kana kuti ine kakunhuhwira kasinganzwisisike, uye ine kakunaka kanotapira, kanovava.
Iyo inonyungudika zvakasununguka muformic acid, inonyungudika mumvura, uye isinganyungudika mu ethanol (95).
Inonyungudika mu dilute hydrochloric acid.
Kuzivikanwa Sarudza iyo infrared absorption spectrum yeL-Valine, yakamboomeswa, sekurairwa munzira ye potassium bromide disk pasi peInfrared Spectrophotometry <2.25>, uye enzanisa iyo spectrum neReference Spectrum: ese maspectra anoratidza kusimba kwakafanana kwekunyura panhamba imwechete yemafungu. .
Optical rotation <2.49> [a]20D: +26.5°~+29.0° (mushure mekuoma, 2 g, 6 mol/L hydrochloric acid TS, 25 mL, 100 mm).
pH <2.54> Dissolve 0.5 g yeL-Valine mu20 mL yemvura: pH yemushonga uyu iri pakati pe5.5 ne6.5.
Kuchena (1) Kujeka uye ruvara rwekugadzirisa Dissolve 0.5 g yeL-Valine mu 20 mL yemvura: mhinduro yakajeka uye isina ruvara.
(2) Chloride <1.03>-Ita bvunzo ne0.5 g yeL-Valine.Gadzirira mhinduro yekudzora ne 0.30 mL ye0.01mol/L hydrochloric acid VS (kwete kupfuura 0.021%).
(3) Sulfate <1.14>-Ita bvunzo ne0.6 g yeL-Valine.Gadzirira mhinduro yekudzora ne 0.35 mL ye0.005mol/L sulfuric acid VS (kwete kupfuura 0.028%).
(4) Ammonium <1.02>-Ita bvunzo ne0.25 g yeL-Valine.Gadzirira mhinduro yekutonga ne 5.0 mL yeStandard Ammonium Solution (kwete kupfuura 0.02%).
(5) Heavy metals <1.07>-Ramba ne 1.0 g yeL-Valine maererano neMethod 1, uye ita muedzo.Gadzirira mhinduro yekutonga ne 2.0 mL yeStandard Lead Solution (kwete kupfuura 20 ppm).
(6) Arsenic <1.11> -Pfuurira ne 1.0g yeL-Valine, gadzirira mhinduro yekuedza maererano neMethod 2, uye ita bvunzo (kwete kupfuura 2 ppm).
(7) Zvinhu zvinoenderana-Dissolve 0.10 g yeL-Valine mu 25mL yemvura, uye shandisa iyi mhinduro semuenzaniso wemhinduro.Pombi 1 mL yemushonga wemuyedzo, wobva wawedzera mvura kuita 50mL chaiyo.Pombi 5 mL yemushonga uyu, wedzera mvura kuita 20 mL chaiyo, uye shandisa mhinduro iyi seyakajairwa mhinduro.Ita bvunzo nemhinduro idzi sekurairwa pasi peThin-layer Chromatography <2.03>.Spot 5mL imwe neimwe yemhinduro yemuenzaniso uye yakajairwa mhinduro pandiro yesilica gel kune yakatetepa-layer chromatography.Gadzira ndiro yacho nemusanganiswa we1-butanol, mvura neacetic acid (100) (3:1:1) kusvika kureba ingangoita masendimita gumi, woomesa ndiro yacho pa80℃ kwemaminitsi makumi matatu.Pfaya zvakaenzana mhinduro yeninhydrin muacetone (1 mu50) mundiro, uye kupisa pa80 ℃ kwemaminitsi mashanu: makwapa kunze kwenzvimbo huru kubva mumhinduro yemuenzaniso haana kusimba kupfuura nzvimbo kubva kune yakajairwa mhinduro.
Kurasikirwa pakuomeswa <2.41> Kwete kupfuura 0.30% (1 g, 105℃,3 maawa).
Zvisaririra pakubatidza <2.44> Kwete kupfuura 0.1% (1 g).
Assay Weresa nemazvo nezve 0.12 g yeL-Valine, yakamboomeswa, uye yakanyungudika mu3 mL yeformic acid, wedzera 50 mL yeacetic acid (100), uye titrate <2.50> ne0.1 mol/L perchloric acid VS (potentiometric titration) .Ita chisungo chisina chinhu, uye ita chero gadziriso inodiwa.
Imwe mL ye0.1 mol/L perchloric acid VS＝11.72 mg yeC5H11NO2
Midziyo uye kuchengetedza Containers-Tight midziyo.