L-Phenylalanine CAS 63-91-2 (H-Phe-OH) Nyocha 98.5 ~ 101.5% Ụlọ ọrụ dị elu

L-Phenylalanine, mgbe akpọnwụwo, nwere ihe na-erughị 98.5% nke C9H11NO2.
Nkọwa L-Phenylalanine pụtara dị ka kristal ọcha ma ọ bụ ntụ ntụ kristal.Ọ na-esighị isi ma ọ bụ na-esighị ike e ji mara ya, na-enwekwa uto ilu.Ọ na-agbaze n'efu na formic acid, na-agbaze obere mmiri n'ime mmiri, yana ihe fọrọ nke nta ka ọ bụrụ ihe a na-adịghị ahụkebe na ethanol (95).Ọ na-agbaze na dilute hydrochloride acid.
Chọpụta ụdịdị infrared absorption spectrum nke L-Phenylalanine, nke a mịrị amịburu, dị ka eduzi ya na usoro potassium bromide disk n'okpuru Infrared Spectrophotometry <2.25>, ma jiri ụdịdị dị iche iche tụnyere nkọwa nkọwa: ụdịdị abụọ ahụ na-egosipụta ike nke absorption n'otu ọnụọgụ ebili mmiri ahụ. .
Ntụgharị anya <2.49> [a] D20: -33.0° ruo -35.59° (mgbe ihichachara, 0.5 g, mmiri, 25 mL, 100 mm).
pH <2.54> Gbarie 0.20 g nke L-Phenylalanine na mmiri 20 ml: pH nke ngwọta a dị n'etiti 5.3 na 6.3.
Ịdị ọcha (1) Ịdị ọcha na agba nke ngwọta-agbari 0.5 g nke L-Phenylalanine na 10 ml nke 1 mol hydrochloric acid TS: ngwọta doro anya na enweghị agba.
(2) Chloride <1.03>-Mee ule na 0.5 g nke L-Phenylalanine.Kwadebe ngwọta nchịkwa na 0.30 ml nke 0.01 mol / L hydrochloride acid VS (ọ bụghị karịa 0.021%).
(3) Sulfate <1.14>-Mee ule na 0.6 g nke L-Phenylalanine.Kwadebe ngwọta nchịkwa na 0.35 ml nke 0.005 mol/L sulfuric acid VS (ọ bụghị karịa 0.028z).
(4) Ammonium <1.02>-Mee ule na 0.25 g nke L-Phenylalanine.Kwadebe ngwọta nchịkwa na 5.0 ml nke Standard Ammonium Solution (ọ bụghị karịa 0.02%).
(5) Ọla dị arọ <1.07>-Gbasa 1.0 g nke L-Phenylalanine na mmiri 40 ml na 2 mL nke dilute acetic acid site na ikpo ọkụ, dị jụụ, tinye mmiri ka ọ bụrụ 50 ml.Mee ule ahụ site na iji ngwọta a dị ka ngwọta ule.Kwadebe ngwọta nchịkwa dị ka ndị a: na 2.0 ml nke Standard Lead Solution tinye 2 mL nke dilute acetic acid na mmiri iji mee 50 mL (ọ bụghị ihe karịrị 20 ppm).
(6) Arsenic <1.11> - Gbanyụọ 1.0 g nke L-Phenylalanine na 5 mL nke dilute hydrochloride acid na 15 ml mmiri, ma mee ule ahụ na ngwọta a dị ka ngwọta ule (ọ bụghị karịa 2 ppm).
(7) Ihe ndị metụtara ya - gbazee 0.10 g nke L-Phenylalanine na 25 ml mmiri, ma jiri ngwọta a dị ka ihe nlele.Pipet 1 mL nke ngwọta nlele, ma gbakwunye mmiri iji mee kpọmkwem 50 ml.Pipet 5 ml nke ihe ngwọta a, gbakwunye mmiri iji mee kpọmkwem 20 ml, ma jiri ngwọta a dị ka ọkọlọtọ ọkọlọtọ.Jiri ngwọta ndị a mee nnwale ahụ dị ka a gwara gị n'okpuru Chromatography nke Thin-Layer <2.03>.Kpatụ 5mL nke ọ bụla n'ime ihe nlele nlele yana ngwọta ọkọlọtọ na efere silica gel maka chromatography nke dị obere.Mepụta efere ahụ na ngwakọta nke 1-butanol, mmiri na acetic acid (100) (3: 1: 1) ka ọ dị ihe dịka 10 cm, wee kpoo efere ahụ na 809Cfor30minutes.Fesa ihe ngwọta nke ninhydrin n'otu n'otu na acetone (1 na 50) na efere ahụ, na-ekpo ọkụ na 80 ℃ maka nkeji 5: ntụpọ ndị ọzọ karịa ebe bụ isi site na ngwọta nlele adịghị agwụ agwụ karịa ebe sitere na ngwọta ọkọlọtọ.
Ọnwụ na ihicha <2.41> Ọ bụghị ihe karịrị 0.30% (1 g, 105 ℃, awa 3).
Ihe fọdụrụ na mgbanye <2.44> Ọ bụghị karịa 0.10% (1 g).
Assay tụọ n'ụzọ ziri ezi banyere 0.17 g nke L-Phenylalanine, nke a mịrị amị na mbụ, wee gbazee na 3 ml nke formic acid, tinye 50mL nke acetic acid (100), na titrate <2.50> na 0.1 mol/L perchloric acid VS (potentiometric titration).Mee mkpebi efu, ma mee mgbazi ọ bụla dị mkpa.
Otu ml nke 0.1 mol/L perchloric acid VS 16.52 mg nke C9H11NO2
Ebube na ihe nchekwa-akpa ndị siri ike.