L-Phenylalanine CAS 63-91-2 (H-Phe-OH) Uvavanyo 98.5 ~ 101.5% Umgangatho ophezulu weFactory

I-L-Phenylalanine, xa yomisiwe, iqulethe ngaphantsi kwe-98.5% ye-C9H11NO2.
Inkcazo I-L-Phenylalanine yenzeka njengeekristale ezimhlophe okanye umgubo wekristale.Ayinavumba okanye inevumba elimfiliba, kwaye inencasa ekrakra kancinane.Inyibilika ngokukhululekileyo kwi-asidi ye-formic, i-soluble kancinci emanzini, kwaye ayinyibiliki kwi-ethanol (95).Inyibilika kwi-dilute hydrochloride acid.
Ukuchongwa Ukumisela i-spectrum ye-infrared yokufunxa ye-L-Phenylalanine, eyomisiwe ngaphambili, njengoko iqondiswe kwindlela ye-potassium bromide disk 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] D20: -33.0 ° ukuya -35.59 ° (emva kokumisa, 0.5 g, amanzi, 25 mL, 100 mm).
pH <2.54> Ukunyibilikisa i-0.20 g ye-L-Phenylalanine kwi-20 mL yamanzi: i-pH yesi sisombululo iphakathi kwe-5.3 kunye ne-6.3
Ukucoceka (1) Ukucaca kunye nombala wesisombululo-Dibanisa i-0.5 g ye-L-Phenylalanine kwi-10 mL ye-1 mol hydrochloric acid TS: isisombululo sicacile kwaye singenambala.
(2) I-Chloride <1.03>-Yenza uvavanyo nge-0.5 g ye-L-Phenylalanine.Lungisa isisombululo sokulawula kunye ne-0.30 mL ye-0.01 mol / L i-hydrochloride acid VS (kungekho ngaphezu kwe-0.021%).
(3) Sulfate <1.14>-Yenza uvavanyo nge-0.6 g ye-L-Phenylalanine.Lungiselela isisombululo sokulawula kunye ne-0.35 mL ye-0.005 mol / L i-sulfuric acid VS (kungekho ngaphezu kwe-0.028z).
(4) Ammonium <1.02>-Yenza uvavanyo nge-0.25 g ye-L-Phenylalanine.Lungiselela isisombululo sokulawula kunye ne-5.0 mL ye-Standard Ammonium Solution (engekho ngaphezu kwe-0.02%).
(5) Heavy Metals <1.07>-Dibanisa i-1.0 g ye-L-Phenylalanine kwi-40 mL yamanzi kunye ne-2 mL ye-acetic acid ehlanjululweyo ngokufudumeza, ukupholisa, kunye nokongeza amanzi ukwenza i-50 mL.Yenza uvavanyo usebenzisa esi sisombululo njengesisombululo sovavanyo.Lungiselela isisombululo sokulawula ngolu hlobo lulandelayo: kwi-2.0 mL yeSisombululo esiPhambili seNkokheli yongeza i-2 mL ye-dilute acetic acid kunye namanzi ukwenza i-50 mL (kungekho ngaphezu kwe-20 ppm).
(6) Arsenic <1.11>-Dissolve 1.0 g ye-L-Phenylalanine kwi-5 mL ye-dilute hydrochloride acid kunye ne-15 mL yamanzi, kwaye wenze uvavanyo ngesi sisombululo njengesisombululo sovavanyo (kungekho ngaphezu kwe-2 ppm).
(7) Izinto eziNxulumeneyo-Dibanisa i-0.10 g ye-L-Phenylalanine kwi-25 mL 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 ngomxube we-1-butanol, amanzi kunye ne-acetic acid (100) (3: 1: 1) ukuya kumgama omalunga ne-10 cm, kwaye womise ipleyiti kwi-809Cfor30minutes.Gcoba ngokulinganayo isisombululo se-ninhydrin kwi-acetone (i-1 in50) kwi-plate, kunye nokushisa kwi-80 ℃ imizuzu emi-5: amabala angaphandle kwendawo eyintloko kwisisombululo sesampulu ayinamandla ngaphezu kwendawo evela kwisisombululo esiqhelekileyo.
Ilahleko ekomileyo <2.41> Akukho ngaphezu kwe-0.30% (1 g, 105℃, iiyure ezi-3).
Intsalela kwi-Ignition <2.44> Akukho ngaphezu kwe-0.10% (1 g).
Uvavanyo Ukala ngokuchanekileyo malunga ne-0.17 g ye-L-Phenylalanine, eyomisiwe ngaphambili, kwaye inyibilika kwi-3 mL ye-formic acid, yongeza i-50mL 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＝16.52 mg ye-C9H11NO2
Imigqomo kunye nokugcinwa Izikhongozeli-Tight izikhongozeli.