L-Valine CAS 72-18-4 (H-Val-OH) Nyocha 98.5 ~ 101.0% Ụlọ ọrụ dị elu

L-Valine (H-Val-OH) (CAS: 72-18-4) AJI 97 Usoro ule
Nchọpụta: Tụlee ụdị nnabata infrared nke ihe nlele ahụ na nke ọkọlọtọ site na usoro diski bromide potassium.
Ntụgharị a kapịrị ọnụ [α]20/D: Nlereanya akpọnwụwo, C=8, 6mol/L HCl
Ọnọdụ Ngwọta (Nfefe): 0.5g na 20ml nke H2O, spectrophotometer, 430nm, 10mm cell ọkpụrụkpụ.
Chloride (Cl): 0.7g, A-1, ntụgharị: 0.40ml nke 0.01mol/L HCl
Ammonium (NH4): B-2
Sulfate (SO4): 1.2g, (1), ntụgharị: 0.50ml nke 0.005mol/L H2SO4
Ígwè (Fe): 1.5g, (2), ntụgharị: 1.5ml nke Ígwè Std.(0.01mg/ml)
Ọla dị arọ (Pb): 2.0g, (2), ntụgharị: 2.0ml nke Pb Std.(0.01mg/ml)
Arsenic (As2O3): 2.0g, (2), ntụgharị: 2.0ml nke As2O3 Std.
Amino acid ndị ọzọ: Dilute amonia R2 Nlele ule: 50μg, F-6-a, njikwa: L-Tyr 0.25μg
Ọnwụ na ihicha: na 105 ℃ maka awa 3.
Ihe fọdụrụ na mgbanye (Sulfated): AJI Test 13
Nyocha: Mịrị amị sample, 120mg, (1), 3ml nke formic acid, 50ml nke glacial acetic acid, 0.1mol/L HCLO4 1ml=11.715mg C5H11NO2
Nnwale pH: 1.0g na 20ml nke H2O

L-Valine (H-Val-OH) (CAS: 72-18-4)Usoro ule JP16
L-Valine, mgbe akpọnwụwo, nwere ihe na-erughị 98.5% nke C5H11NO2.
Nkọwa L-Valine pụtara dị ka kristal ọcha ma ọ bụ ntụ ntụ kristal.Ọ na-esi ísì ụtọ ma ọ bụ na-esi ísì ụtọ na-esi ísì ụtọ, nke na-aghọ ilu.
Ọ na-agbaze n'efu na formic acid, soluble na mmiri, na ihe fọrọ nke nta ka ọ bụrụ ihe a na-apụghị sosolument na ethanol (95).
Ọ na-agbaze na dilute hydrochloric acid.
Kpebie ụdị nnabata infrared nke L-Valine, nke akpọnwụworị, dị ka eduzi ya na usoro potassium bromide disk n'okpuru Infrared Spectrophotometry <2.25>, wee jiri ụdịdị dị iche iche tụnyere Spectrum Reference: ụdịdị abụọ ahụ na-egosipụta ike nke absorption n'otu ọnụọgụ ebili mmiri ahụ. .
Ntugharị anya <2.49> [a] 20D: +26.5°~+29.0° (mgbe ihichachara, 2 g, 6 mol/L hydrochloric acid TS, 25 ml, 100 mm).
pH <2.54> Gbari 0.5 g nke L-Valine na 20 ml mmiri: pH nke ngwọta a dị n'etiti 5.5 na 6.5.
Ịdị ọcha (1) Ịdị ọcha na agba nke ngwọta Gbari 0,5 g nke L-Valine na 20 ml mmiri: ngwọta doro anya na enweghị agba.
(2) Chloride <1.03>-Mee ule na 0.5 g nke L-Valine.Kwadebe ngwọta nchịkwa na 0.30 ml nke 0.01mol / L hydrochloric acid VS (ọ bụghị karịa 0.021%).
(3) Sulfate <1.14>-Mee ule na 0.6 g nke L-Valine.Kwadebe ngwọta nchịkwa na 0.35 ml nke 0.005mol / L sulfuric acid VS (ọ bụghị karịa 0.028%).
(4) Ammonium <1.02>-Mee ule na 0.25 g nke L-Valine.Kwadebe ngwọta nchịkwa na 5.0 ml nke Standard Ammonium Solution (ọ bụghị karịa 0.02%).
(5) Ọla dị arọ <1.07>-Gaa n'ihu na 1.0 g nke L-Valine dịka usoro 1 siri dị, wee mee ule ahụ.Kwadebe ngwọta nchịkwa na 2.0 ml nke Standard Lead Solution (ọ bụghị karịa 20 ppm).
(6) Arsenic <1.11> - Gaba na 1.0g nke L-Valine, kwadebe ngwọta ule dị ka usoro 2, ma mee ule ahụ (ọ bụghị karịa 2 ppm).
(7) Ihe ndị metụtara ya - gbazee 0.10 g L-Valine na mmiri 25mL, ma jiri ngwọta a dị ka ihe ngwọta 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 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 80 ℃ maka nkeji 30.Fesa ihe ngwọta nke ninhydrin n'otu n'otu na acetone (1 n'ime 50) na efere ahụ, na-ekpo ọkụ na 80 ℃ maka nkeji 5: ntụpọ ndị ọzọ karịa ebe bụ isi site na ngwọta nlele adịghị kpụ ọkụ n'ọnụ karịa ebe sitere na ngwọta ọkọlọtọ.
Ọnwụ na ihicha <2.41> Ọ bụghị ihe karịrị 0.30% (1 g, 105 ℃, 3 awa).
Ihe fọdụrụ na mgbanye <2.44> Ọ bụghị karịa 0.1% (1 g).
Assay tụrụ n'ụzọ ziri ezi banyere 0.12 g nke L-Valine, nke a mịrị amị na mbụ, wee gbarie na 3 ml nke formic acid, tinye 50 ml 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 11.72 mg nke C5H11NO2
Ebube na ihe nchekwa-akpa ndị siri ike.