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

L-Valine (H-Val-OH) (CAS: 72-18-4) AJI 97 Njira Yoyesera
Chizindikiritso: Fananizani kuchuluka kwa mayamwidwe a infrared a chitsanzo ndi njira ya potaziyamu bromide disc.
Kuzungulira Kwapadera [α]20/D: Zitsanzo Zouma, C=8, 6mol/L HCl
State of Solution (Transmittance): 0.5g mu 20ml ya H2O, spectrophotometer, 430nm, 10mm cell makulidwe.
Chloride (Cl): 0.7g, A-1, ref: 0.40ml ya 0.01mol/L HCl
Ammonium (NH4): B-2
Sulfate (SO4): 1.2g, (1), ref: 0.50ml ya 0.005mol/L H2SO4
Chitsulo (Fe): 1.5g, (2), ref: 1.5ml ya Iron Std.(0.01mg/ml)
Zitsulo Zolemera (Pb): 2.0g, (2), ref: 2.0ml ya Pb Std.(0.01mg/ml)
Arsenic (As2O3): 2.0g, (2), ref: 2.0ml ya As2O3 Std.
Ma Amino Acid Ena: Dilute ammonia R2 Test Chitsanzo: 50μg, F-6-a, control: L-Tyr 0.25μg
Kutaya pa Kuyanika: pa 105 ℃ kwa maola atatu.
Zotsalira pa Ignition (Sulfated): AJI Test 13
Kuyesa: Zitsanzo zouma, 120mg, (1), 3ml ya formic acid, 50ml ya glacial acetic acid, 0.1mol/L HCLO4 1ml = 11.715mg C5H11NO2
Mayeso a pH: 1.0g mu 20ml ya H2O

L-Valine (H-Val-OH) (CAS: 72-18-4)Njira Yoyesera ya JP16
L-Valine, ikauma, imakhala yosachepera 98.5% ya C5H11NO2.
Kufotokozera L-Valine kumachitika ngati makhiristo oyera kapena ufa wa crystalline.Ndiwopanda fungo kapena fungo losamveka bwino, ndipo amakhala ndi kukoma kokoma pang'ono, komwe kumakhala kowawa.
Imasungunuka momasuka mu formic acid, imasungunuka m'madzi, ndipo imakhala yosasungunuka mu ethanol (95).
Imasungunuka mu dilute hydrochloric acid.
Chizindikiritso Dziwani kuchuluka kwa mayamwidwe a infrared a L-Valine, owumitsidwa kale, monga momwe adayankhidwira mu njira ya potaziyamu bromide disk pansi pa Infrared Spectrophotometry <2.25>, ndi kuyerekeza sipekitiramu ndi Reference Spectrum: mawonekedwe onsewa amawonetsa kulimba kofanana kwa mayamwidwe amtundu womwewo. .
Kuzungulira kwa kuwala <2.49> [a]20D: +26.5°~+29.0° (ataumitsa, 2 g, 6 mol/L hydrochloric acid TS, 25 mL, 100 mm).
pH <2.54> Sungunulani 0.5 g ya L-Valine mu 20 ml ya madzi: pH ya yankho ili pakati pa 5.5 ndi 6.5.
Kuyera (1) Kumveka bwino ndi mtundu wa yankho Sungunulani 0,5 g wa L-Valine mu 20 ml ya madzi: yankho ndi lomveka bwino komanso lopanda mtundu.
(2) Chloride <1.03>-Yesani mayeso ndi 0.5 g ya L-Valine.Konzani njira yowongolera ndi 0.30 mL ya 0.01mol/L hydrochloric acid VS (osapitirira 0.021%).
(3) Sulfate <1.14> -Chitani mayeso ndi 0,6 g ya L-Valine.Konzani njira yowongolera ndi 0.35 mL ya 0.005mol/L sulfuric acid VS (osapitirira 0.028%).
(4) Ammonium <1.02>-Yesani mayeso ndi 0,25 g ya L-Valine.Konzani njira yowongolera ndi 5.0 mL ya Standard Ammonium Solution (osapitirira 0.02%).
(5) Zitsulo zolemera <1.07>-Pitirizani ndi 1.0 g ya L-Valine molingana ndi Njira 1, ndikuchita mayeso.Konzani njira yowongolera ndi 2.0 mL ya Standard Lead Solution (osapitirira 20 ppm).
(6) Arsenic <1.11> -Pitirizani ndi 1.0g ya L-Valine, konzekerani njira yothetsera mayesero molingana ndi Njira 2, ndikuchita mayeso (osapitirira 2 ppm).
(7) Zinthu zogwirizana-Sungani 0,10 g ya L-Valine mu 25mL yamadzi, ndipo gwiritsani ntchito yankholi ngati njira yothetsera.Pipeni 1 mL yachitsanzo, ndikuwonjezera madzi kuti mupange 50 ml ndendende.Pipeni 5 ml ya yankho ili, onjezerani madzi kuti mupange 20 ml ndendende, ndipo gwiritsani ntchito yankholi ngati yankho lokhazikika.Chitani mayeso ndi mayankho awa monga momwe akuwongolera pansi pa Thin-layer Chromatography <2.03>.Malo 5mL iliyonse ya yankho lachitsanzo ndi yankho lokhazikika pa mbale ya silika gel osakaniza chromatography.Pangani mbaleyo ndi kusakaniza kwa 1-butanol, madzi ndi acetic acid (100) (3:1:1) mpaka mtunda wa masentimita 10, ndikuwumitsa mbaleyo pa 80 ℃ kwa mphindi 30.Utsi wofanana yankho la ninhydrin mu acetone (1 mu 50) pa mbale, ndi kutentha pa 80 ℃ kwa mphindi 5: madontho ena kupatulapo malo ofunikira kuchokera ku yankho lachitsanzo sali olimba kuposa malo omwe amachokera ku yankho lokhazikika.
Kutaya pa kuyanika <2.41> Osapitirira 0.30% (1 g, 105 ℃,3 maola).
Zotsalira pakuyatsa <2.44> Osapitirira 0.1% (1 g).
Kuyeza Kuyeza molondola za 0.12 g ya L-Valine, yowumitsidwa kale, ndi kusungunula mu 3 mL ya formic acid, kuwonjezera 50 mL ya acetic acid (100), ndi titrate <2.50> ndi 0.1 mol/L perchloric acid VS (potentiometric titration) .Chitani chitsimikiziro chopanda kanthu, ndipo pangani kukonza kulikonse kofunikira.
ML iliyonse ya 0.1 mol/L perchloric acid VS＝11.72 mg ya C5H11NO2
Zotengera ndi zosungirako Zotengera-Zolimba zolimba.