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

ʻO L-Phenylalanine, ke maloʻo, ʻaʻole i emi ma lalo o 98.5% o C9H11NO2.
Hōʻike ʻia ʻo L-Phenylalanine e like me nā keokeo keʻokeʻo a i ʻole ka pauka crystalline.ʻAʻohe ona ʻala a ʻaʻala iki paha, a he ʻawaʻawa iki kona ʻono.Hiki ke hoʻoheheʻe ʻia i loko o ka waika formic, hiki ke hoʻoheheʻe ʻia i ka wai, a hiki ʻole i ka ethanol (95).Hoʻoheheʻe ia i ka waika hydrochloride dilute.
Identification E hoʻoholo i ke kiko kikoʻī infrared absorption o L-Phenylalanine, i hoʻomaloʻo mua ʻia, e like me ke kuhikuhi ʻana ma ke ʻano pāpaʻi pāpaʻa bromide ma lalo o Infrared Spectrophotometry <2.25>, a hoʻohālikelike i ke kikoʻī me ka Spectrum Reference: hōʻike nā kikoʻī ʻelua i ka ikaika like o ka absorption ma nā helu nalu like. .
ʻO ka Rotation Optical <2.49> [a] D20: -33.0° a i -35.59° (ma hope o ka maloʻo ʻana, 0.5 g, wai, 25 mL, 100 mm).
pH <2.54> E hoʻoheheʻe i 0.20 g o L-Phenylalanine i 20 mL o ka wai: ʻo ka pH o kēia hopena ma waena o 5.3 a me 6.3
Maʻemaʻe (1) Ka māmā a me ka waihoʻoluʻu o ka hoʻonā-Dissolve 0.5 g o L-Phenylalanine i 10 mL o 1 mol hydrochloric acid TS: he akaka a kala ʻole ka hopena.
(2) Chloride <1.03>-E hana i ka ho'āʻo me 0.5 g o L-Phenylalanine.E hoʻomākaukau i ka hopena hoʻomalu me 0.30 mL o 0.01 mol/L hydrochloride acid VS (ʻaʻole iʻoi aku ma mua o 0.021%).
(3) Sulfate <1.14>-E hana i ka ho'āʻo me 0.6 g o L-Phenylalanine.E hoʻomākaukau i ka hoʻonā mana me 0.35 mL o 0.005 mol/L sulfuric acid VS (ʻaʻole i ʻoi aku ma mua o 0.028z).
(4) Ammonium <1.02>-E hana i ka ho'āʻo me 0.25 g o L-Phenylalanine.E hoʻomākaukau i ka hoʻonā hoʻomalu me 5.0 mL o ka ʻĀpana Ammonium maʻamau (ʻaʻole ʻoi aku ma mua o 0.02%).
(5) Nā Metala Kaumaha <1.07>-E hoʻoheheʻe i ka 1.0 g o L-Phenylalanine i 40 mL o ka wai a me 2 mL o ka waika acetic dilute ma ka hoʻomehana ʻana, hoʻoluʻu, a hoʻohui i ka wai e lilo i 50 mL.Hana i ka ho'āʻo me ka hoʻohana ʻana i kēia hoʻonā e like me ka hopena hoʻāʻo.E hoʻomākaukau i ka ʻaha hoʻomalu penei: i ka 2.0 mL o ka mea hoʻonā alakaʻi maʻamau e hoʻohui i 2 mL o ka waikawa acetic dilute a me ka wai e hana ai i 50 mL (ʻaʻole ʻoi aku ma mua o 20 ppm).
(6) Arsenic <1.11>-E hoʻoheheʻe i 1.0 g o L-Phenylalanine i 5 mL o ka waika hydrochloride dilute a me 15 mL o ka wai, a hana i ka ho'āʻo me kēia hoʻonā e like me ka hopena ho'āʻo (ʻaʻoleʻoi aku ma mua o 2 ppm).
(7) Nā mea pili-E hoʻoheheʻe i 0.10 g o L-Phenylalanine i 25 mL o ka wai, a hoʻohana i kēia haʻina e like me ka hāpana hāpana.Pipet 1 mL o ka hāpana hāpana, a hoʻohui i ka wai i 50 mL pono.Pipet 5 mL o kēia haʻina, hoʻohui i ka wai e hana pono i 20 mL, a hoʻohana i kēia haʻina e like me ka hopena maʻamau.E hana i ka ho'āʻo me kēia mau haʻina e like me ka kuhikuhi ʻana ma lalo o Thin-layer Chromatography <2.03>.E kau i 5mL o kēlā me kēia hāpana hāpana a me ka hoʻonā maʻamau ma luna o kahi pā silica gel no ka chromatography ʻāpana lahilahi.E hoʻomohala i ka pā me ka hui ʻana o ka 1-butanol, ka wai a me ka ʻakika acetic (100) (3:1:1) a hiki i kahi mamao o 10 cm, a hoʻomaloʻo i ka pā ma 809C no 30 mau minuke.E pāpaʻi like i ka hopena o ka ninhydrin i loko o ka acetone (1 in50) ma ka pā, a me ka wela ma 80 ℃ no 5 mau minuke: ʻaʻole i ʻoi aku ka ikaika o nā kiko ma waho o ke kiko nui o ka hāpana hāpana ma mua o ka wahi mai ka hopena maʻamau.
ʻAʻole ʻoi aku ma mua o 0.30% (1 g, 105℃, 3 hola).
ʻAʻole i ʻoi aku ma mua o 0.10% (1 g).
E kaupaona pololei ma kahi o 0.17 g o L-Phenylalanine, maloʻo mua, a hoʻoheheʻe ʻia i 3 mL o ka waika formic, hoʻohui i 50mL o ka ʻakika acetic (100), a e hoʻoemi <2.50> me 0.1 mol/L perchloric acid VS (potentiometric titration).Hana i kahi hoʻoholo hakahaka, a hana i nā hoʻoponopono e pono ai.
ʻO kēlā me kēia mL o 0.1 mol/L perchloric acid VS＝16.52 mg o C9H11NO2
ʻO nā pahu a me ka mālama ʻana i nā pahu pahu-paʻa paʻa.