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

L-Phenylalanine, ha e omisitsoe, ha e na ka tlase ho 98.5% ea C9H11NO2.
Tlhaloso L-Phenylalanine e hlaha e le likristale tse tšoeu kapa phofo ea crystalline.Ha e na monko kapa e na le monko o fokolang, 'me e na le tatso e babang hanyane.E qhibiliha ka bolokolohi ka formic acid, e qhibiliha hanyenyane metsing, 'me e batla e sa qhibilihe ka har'a ethanol (95).E qhibiliha ka ho hlapolla hydrochloride acid.
Ho tsebahatsa Lemoha sekhahla sa ho monya ha infrared sa L-Phenylalanine, se neng se omisitsoe pele, joalo ka ha se laetsoe ka mokhoa oa potassium bromide disk tlas'a Infrared Spectrophotometry <2.25>, 'me u bapise spectrum le Reference Spectrum: ka bobeli li bonts'a matla a tšoanang a ho monya ka linomoro tse tšoanang tsa maqhubu. .
Optical Rotation <2.49> [a]D20: -33.0 ° ho -35.59 ° (kamora ho omisa, 0.5 g, metsi, 25 mL, 100 mm).
pH <2.54> Qhala 0.20 g ya L-Phenylalanine ka hara 20 ml ya metsi: pH ya tharollo ena e pakeng tsa 5.3 le 6.3
Bohloeki (1) Ho hlaka le 'mala oa tharollo-Hlakola 0.5 g ea L-Phenylalanine ka 10 ml ea 1 mol hydrochloric acid TS: tharollo e hlakile ebile ha e na mebala.
(2) Chloride <1.03>-Etsa tlhahlobo ka 0.5 g ea L-Phenylalanine.Lokisetsa tharollo ea taolo ka 0.30 mL ea 0.01 mol/L hydrochloride acid VS (e seng ho feta 0.021%).
(3) Sulfate <1.14> -Etsa tlhahlobo ka 0.6 g ea L-Phenylalanine.Lokisetsa tharollo ea taolo ka 0.35 mL ea 0.005 mol/L sulfuric acid VS (eseng ho feta 0.028z).
(4) Ammonium <1.02> -Etsa tlhahlobo ka 0.25 g ea L-Phenylalanine.Lokisetsa tharollo ea taolo ka 5.0 mL ea Standard Ammonium Solution (e seng ho feta 0.02%).
(5) Heavy Metals <1.07>-Hlakola 1.0 g ya L-Phenylalanine ka metsing a 40mL le 2 ml ya acetic acid ka ho futhumala, ho pholile, le ho kenya metsi ho etsa 50 ml.Etsa tlhahlobo ka ho sebelisa tharollo ena e le tharollo ea teko.Lokisetsa tharollo ea taolo ka tsela e latelang: ho 2.0 mL ea Standard Lead Solution eketsa 2 mL ea dilute acetic acid le metsi ho etsa 50 mL (eseng ho feta 20 ppm).
(6) Arsenic <1.11>-Hlakola 1.0 g ya L-Phenylalanine ka 5 mL ea dilute hydrochloride acid le 15 ml ea metsi, 'me u etse tlhahlobo ka tharollo ena e le tharollo ea teko (e seng ho feta 2 ppm).
(7) Lintho Tse Amanang - Qhala 0.10 g ea L-Phenylalanine ka 25 ml ea metsi, 'me u sebelise tharollo ena e le mohlala oa tharollo.Pipe 1 ml ea tharollo ea sampole, 'me u kenye metsi ho etsa 50 ml hantle.Pipete 5 ml ea tharollo ena, tšela metsi ho etsa 20 ml hantle, 'me u sebelise tharollo ena e le tharollo e tloaelehileng.Etsa tlhahlobo ka litharollo tsena joalokaha ho laetsoe tlas'a Thin-layer Chromatography <2.03>.Spot 5mL e 'ngoe le e 'ngoe ea tharollo ea mohlala le tharollo e tloaelehileng poleiting ea silika ea silika bakeng sa chromatography ea lera le tšesaane.Theha poleiti ka motsoako oa 1-butanol, metsi le acetic acid (100) (3:1:1) ho ea bohōle ba lisenthimithara tse 10, 'me u omise poleiti ka 809Cfor30minutes.Fafatsa ka ho lekana tharollo ea ninhydrin ka har'a acetone (1 in50) poleiti, 'me mocheso ho 80 ℃ metsotso e 5: matheba ntle le letheba la mantlha ho tsoa ho tharollo ea sampole ha a matla ho feta sebaka se tsoang tharollong e tloaelehileng.
Tahlehelo ka ho Omisa <2.41> Ha e fete 0.30% (1 g, 105℃, lihora tse 3).
Masalla a ho Ignition <2.44> Ha a fete 0.10% (1 g).
Assay Beha boima bo nepahetseng bo ka bang 0.17 g ya L-Phenylalanine, e omisitsweng pele, mme o qhibidiha ka 3 mL ya formic acid, eketsa 50mL ya acetic acid (100), le titrate <2.50> ka 0.1 mol/L perchloric acid VS (potentiometric titration).Etsa qeto e se nang letho, 'me u etse tokiso e hlokahalang.
ML ka 'ngoe ea 0.1 mol/L perchloric acid VS＝16.52 mg ea C9H11NO2
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