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

L-Valine (H-Val-OH) (CAS: 72-18-4) AJI 97 Indlela yoVavanyo
Ukuchonga: Thelekisa i-spectrum ye-infrared yokufunxa yesampuli kunye neyomgangatho we-potassium bromide disc method.
Ukujikeleza okuKhethekileyo [α]20/D: Isampulu eyomileyo, C=8, 6mol/L HCl
Imeko yeSolution (Transmittance): 0.5g kwi-20ml ye-H2O, i-spectrophotometer, i-430nm, i-10mm ubukhulu beeseli.
I-Chloride (Cl): 0.7g, A-1, ref: 0.40ml ye-0.01mol/L HCl
I-Ammonium (NH4): B-2
I-Sulfate (SO4): 1.2g, (1), i-ref: 0.50ml ye-0.005mol/L H2SO4
Intsimbi (Fe): 1.5g, (2), ref: 1.5ml ye-Iron Std.(0.01mg/ml)
Iintsimbi ezinzima (Pb): 2.0g, (2), ref: 2.0ml yePb Std.(0.01mg/ml)
Arsenic (As2O3): 2.0g, (2), ref: 2.0ml ye-As2O3 Std.
Ezinye iiAmino Acids: Dilute ammonia R2 Test Sample: 50μg, F-6-a, control: L-Tyr 0.25μg
Ilahleko ekomisweni: kwi-105℃ kwiiyure ezi-3.
Intsalela kwi-Ignition (Sulfated): Uvavanyo lwe-AJI 13
I-Assay: Isampuli eyomileyo, i-120mg, (1), i-3ml ye-asidi ye-formic, i-50ml ye-glacial acetic acid, i-0.1mol / L HCLO4 1ml = 11.715mg C5H11NO2
Uvavanyo lwe-pH: 1.0g kwi-20ml ye-H2O

I-L-Valine (H-Val-OH) (CAS: 72-18-4)Indlela yoVavanyo lweJP16
I-L-Valine, xa yomisiwe, iqulethe ngaphantsi kwe-98.5% ye-C5H11NO2.
Inkcazo L-Valine yenzeka njengeekristale ezimhlophe okanye umgubo wekristale.Ayinavumba okanye inevumba elimfiliba, kwaye inencasa eswiti kancinane, ethi ibe krakra.
Inyibilika ngokukhululekileyo kwifomic acid, inyibilika emanzini, kwaye ayinyibiliki kwi-ethanol (95).
Inyibilika kwi-dilute hydrochloric acid.
Ukuchonga Ukumisela i-spectrum ye-infrared yokufunxa ye-L-Valine, yomiswe ngaphambili, njengoko iqondiswe kwindlela yedisk ye-potassium bromide phantsi kwe-Infrared Spectrophotometry <2.25>, kwaye uthelekise i-spectrum kunye ne-Reference Spectrum: zombini i-spectra ibonisa ubunzulu obufanayo bokufunxa kumanani amaza afanayo. .
Ukujikeleza kwe-Optical <2.49> [a] 20D: + 26.5 ° ~ + 29.0 ° (emva kokumisa, 2 g, 6 mol / L i-hydrochloric acid TS, 25 mL, 100 mm).
pH <2.54> Dissolve 0.5 g ye-L-Valine kwi-20 mL yamanzi: i-pH yesi sisombululo iphakathi kwe-5.5 kunye ne-6.5.
Ukucoceka (1) Ukucaca kunye nombala wesisombululo Dissolve 0.5 g ye-L-Valine kwi-20 mL yamanzi: isisombululo sicacile kwaye singenambala.
(2) I-Chloride <1.03>-Yenza uvavanyo nge-0.5 g ye-L-Valine.Lungisa isisombululo sokulawula kunye ne-0.30 mL ye-0.01mol / L i-hydrochloric acid VS (kungekho ngaphezu kwe-0.021%).
(3) Sulfate <1.14>-Yenza uvavanyo nge-0.6 g ye-L-Valine.Lungiselela isisombululo sokulawula kunye ne-0.35 mL ye-0.005mol / L i-sulfuric acid VS (kungekho ngaphezu kwe-0.028%).
(4) Ammonium <1.02>-Yenza uvavanyo nge-0.25 g ye-L-Valine.Lungiselela isisombululo sokulawula kunye ne-5.0 mL ye-Standard Ammonium Solution (engekho ngaphezu kwe-0.02%).
(5) Iintsimbi ezinzima <1.07>-Qhubeka kunye ne-1.0 g ye-L-Valine ngokweNdlela ye-1, kwaye wenze uvavanyo.Lungiselela isisombululo solawulo kunye ne-2.0 mL yeSisombululo esiPhambili seNkokheli (kungekho ngaphezu kwe-20 ppm).
(6) Arsenic <1.11> -Qhubeka kunye ne-1.0g ye-L-Valine, lungiselela isisombululo sovavanyo ngokweNdlela yesi-2, kwaye wenze uvavanyo (kungekho ngaphezu kwe-2 ppm).
(7) Izinto ezihambelanayo-Dibanisa i-0.10 g ye-L-Valine kwi-25mL yamanzi, kwaye usebenzise esi sisombululo njengesisombululo sesampuli.Umbhobho oyi-1 mL yesampulu yesisombululo, kwaye wongeze amanzi ukwenza kanye i-50mL.Umbhobho we-5mL yesi sisombululo, yongeza amanzi ukwenza i-20 mL ngqo, kwaye usebenzise esi sisombululo njengesisombululo esiqhelekileyo.Yenza uvavanyo ngezi zisombululo njengoko kuqondiswe phantsi kwe-Thin-layer Chromatography <2.03>.I-Spot 5mL nganye yesisombululo sesampuli kunye nesisombululo esiqhelekileyo kwi-plate ye-silica gel ye-chromatography enqabileyo.Phuhlisa ipleyiti kunye nomxube we-1-butanol, amanzi kunye ne-acetic acid (100) (3: 1: 1) ukuya kumgama omalunga ne-10 cm, kwaye uyomise iplate kwi-80 ℃ imizuzu engama-30.Gcoba ngokulinganayo isisombululo se-ninhydrin kwi-acetone (i-1 ku-50) kwi-plate, kunye nokufudumala kwi-80 ℃ imizuzu emi-5: amabala angaphandle kwendawo eyintloko kwisisombululo sesampuli ayinamandla ngaphezu kwendawo evela kwisisombululo esiqhelekileyo.
Ilahleko ekomisweni <2.41> Akukho ngaphezu kwe-0.30% (1 g, 105℃,3 iiyure).
Intsalela ekutshisweni <2.44> Akukho ngaphezu kwe-0.1% (1 g).
I-Assay Ukulinganisa ngokuchanekileyo malunga ne-0.12 g ye-L-Valine, yomiswe ngaphambili, kwaye inyibilike kwi-3 mL ye-asidi ye-formic, yongeza i-50 mL ye-acetic acid (100), kunye ne-titrate <2.50> kunye ne-0.1 mol / L ye-perchloric acid VS (i-potentiometric titration) .Yenza isigqibo esingenanto, kwaye wenze naluphi na ulungiso oluyimfuneko.
I-mL nganye ye-0.1 mol/L ye-perchloric acid VS＝11.72 mg ye-C5H11NO2
Imigqomo kunye nokugcinwa Izikhongozeli-Tight izikhongozeli.