L-Phenylalanine CAS 63-91-2 (H-Phe-OH) Assay 98.5 ~ 101.5% Factory High Quality

L-Phenylalanine, ikauma, imakhala yosachepera 98.5% ya C9H11NO2.
Kufotokozera L-Phenylalanine amapezeka ngati makhiristo oyera kapena ufa wa crystalline.Ilibe fungo kapena imakhala ndi fungo lochepa chabe, ndipo ili ndi kukoma kowawa pang'ono.Imasungunuka mwaulere mu formic acid, imasungunuka pang'ono m'madzi, ndipo imakhala yosasungunuka mu ethanol (95).Imasungunuka mu dilute hydrochloride acid.
Chizindikiritso Dziwani kuchuluka kwa mayamwidwe a infrared a L-Phenylalanine, omwe adawumitsidwa kale, monga momwe adayankhidwira mu njira ya potassium bromide disk pansi pa Infrared Spectrophotometry <2.25>, ndikufanizira mawonekedwe ndi Reference Spectrum: mawonekedwe onsewa amawonetsa kulimba kofanana kwa mayamwidwe amtundu womwewo. .
Kutembenuka kwa Optical <2.49> [a]D20: -33.0 ° mpaka -35.59 ° (pambuyo poyanika, 0.5 g, madzi, 25 mL, 100 mm).
pH <2.54> Sungunulani 0.20 g wa L-Phenylalanine mu 20 ml ya madzi: pH ya yankho ili pakati pa 5.3 ndi 6.3
Kuyera (1) Kumveka bwino ndi mtundu wa njira - Sungunulani 0,5 g wa L-Phenylalanine mu 10 ml ya 1 mol hydrochloric acid TS: yankho ndi lomveka komanso lopanda mtundu.
(2) Chloride <1.03>-Yesani mayeso ndi 0.5 g ya L-Phenylalanine.Konzani njira yowongolera ndi 0.30 mL ya 0.01 mol/L hydrochloride acid VS (osapitirira 0.021%).
(3) Sulfate <1.14>-Chitani mayeso ndi 0.6 g ya L-Phenylalanine.Konzani njira yowongolera ndi 0.35 mL ya 0.005 mol/L sulfuric acid VS (osapitirira 0.028z).
(4) Ammonium <1.02>-Yesani mayeso ndi 0.25 g ya L-Phenylalanine.Konzani njira yowongolera ndi 5.0 mL ya Standard Ammonium Solution (osapitirira 0.02%).
(5) Heavy Metals <1.07>-Sungani 1.0 g ya L-Phenylalanine mu 40 ml ya madzi ndi 2 mL ya dilute acetic acid potenthetsa, kuziziritsa, ndi kuwonjezera madzi kupanga 50 ml.Yesani kugwiritsa ntchito yankho ili ngati yankho loyesa.Konzani njira yothetsera motere: ku 2.0 mL ya Standard Lead Solution onjezerani 2 mL ya dilute acetic acid ndi madzi kupanga 50 mL (osapitirira 20 ppm).
(6) Arsenic <1.11> -Sungani 1.0 g ya L-Phenylalanine mu 5 mL ya dilute hydrochloride acid ndi 15 ml ya madzi, ndikuyesani ndi yankho ili ngati njira yothetsera (osapitirira 2 ppm).
(7) Zinthu Zogwirizana - Sungunulani 0,10 g wa L-Phenylalanine mu 25 ml ya madzi, 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 chisakanizo cha 1-butanol, madzi ndi acetic acid (100) (3:1:1) mpaka mtunda wa masentimita 10, ndikuwumitsa mbaleyo pa 809Cfor30minutes.Utsi wofanana yankho la ninhydrin mu acetone (1 in50) pa mbale, ndi kutentha pa 80 ℃ kwa mphindi 5: madontho ena kusiyapo 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 ℃, maola 3).
Zotsalira pakuyatsa <2.44> Osapitirira 0.10% (1 g).
Kuyeza Kuyeza molondola za 0.17 g ya L-Phenylalanine, yowumitsidwa kale, ndi kusungunula mu 3 mL ya formic acid, kuwonjezera 50mL 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＝16.52 mg ya C9H11NO2
Zotengera ndi zosungirako Zotengera-Zolimba zolimba.