I-L-Aspartic Acid CAS 56-84-8 (H-Asp-OH) Uvavanyo 98.5 ~ 101.0% Umgangatho ophezulu weFactory

I-L-Aspartic Acid, xa yomisiwe, iqulethe ngaphantsi kwe-98.5% kwaye ingabi ngaphezu kwe-101.0% ye-L-Aspartic Acid (C4H7NO4).
Inkcazelo L-Aspartic Acid yenzeka njengomhlophe, iikristale okanye umgubo wecrystalline.Ayinyibiliki kancinci emanzini, kwaye ayinyibiliki kwi-ethanol (99.5).Inyibilika kwi-dilute hydrochloric acid kunye ne-0.2 mol / L ye-sodium hydroxide TS.
Ukuchonga Ukuchonga i-spectrum yokufunxa i-infrared ye-L-Aspartic Acid njengoko iqondiswe kwindlela ye-potassium bromide disk phantsi kwe-Infrared Spectrophotometry <2.25>, kwaye uthelekise i-spectrum kunye ne-Reference Spectrum: zombini i-spectraexhibit intensity of absorption in the same wave numbers.
Ukujikeleza kwe-Optical <2.49> [a] 20D: + 24.0 ~ + 26.0 ° (2 g, emva kokumisa, i-6 mol / L i-hydrochloric acid TS, 25 mL, 100 mm).
pH <2.54> Dissolve 0.4 g ye-L-Aspartic Acid kwi-100 mL yamanzi ngokufudumala, kwaye uvumele ukupholisa: phakathi kwe-2.5 kunye ne-3.5.
Ukucoceka (1) Ukucaca kunye nombala wesisombululo-Dibanisa i-1.0 g ye-L-Aspartic Acid kwi-20 mL ye-1 mol / L i-hydrochloric acid TS: isisombululo sicacile kwaye singenambala.
(2) I-Chloride <1.03>-Dissolve 0.5 g ye-L-Aspartic Acid kwi-6 mL ye-dilute nitric acid kunye ne-20 mL yamanzi, yongeza amanzi ukwenza i-50 mL, kwaye wenze uvavanyo ngesi sisombululo njengesisombululo sovavanyo.Lungisa isisombululo sokulawula kunye ne-0.30 mL ye-0.01 mol / L i-hydrochloric acid VS (kungekho ngaphezu kwe-0.021%).
(3) Sulfate <1.14>-Dissolve 0.6 g ye-L-Aspartic Acid kwi-5 mL ye-dilute hydrochloric acid kunye ne-30 mL yamanzi, yongeza amanzi ukwenza i-45 mL, kwaye yongeza i-5 mL ye-barium chloride TS.Yenza uvavanyo ngesi sisombululo njengesisombululo sovavanyo.Lungisa isisombululo solawulo nge-0.35 mL ye-0.005 mol / L sulfuric acid VS, yongeza i-5 mL ye-dilute hydrochloric acid kunye namanzi ukwenza i-45 mL, kwaye ungeze i-5 mL ye-barium chloride (ingabi ngaphezu kwe-0.028 ~).
(4) Ammonium<1.02>—Yenza uvavanyo nge-0.25 g ye-L-Aspartic Acid.Lungiselela isisombululo solawulo kunye ne-5.0 mL ye-Standard Ammonium Solution (engekho ngaphezu kwe-0.02z)
(5) Iintsimbi ezinzima <1.07>-Qhubeka kunye ne-1.0 g ye-L-Aspartic Acid ngokweNdlela yesi-4, kwaye wenze uvavanyo.Lungiselela isisombululo solawulo kunye ne-1.0 mL yeSisombululo esiPhambili esiPhambili (kungekho ngaphezu kwe-10 ppm).
(6) Intsimbi <1.10> -Lungisa isisombululo sovavanyo kunye ne-1.0 g ye-L-Aspartic Acid ngokweNdlela ye-1, kwaye wenze uvavanyo ngokweNdlela ye-A. Lungisa isisombululo sokulawula nge-1.0 mL ye-Standard Iron Solution (engekho ngaphezu kwe-10 ppm).
(7) Izinto eziNxulumeneyo-I-Dissolve 0.20 g ye-L-AsparticAcid kwi-10 mL ye-0.2 mol / L ye-sodium hydroxide TS, kwaye usebenzise esi sisombululo njengesisombululo sesampuli.Umbhobho we-1 mL wesisombululo sesampulu, yongeza amanzi ukwenza i-10 mL ngqo.Umbhobho we-1 mLof esi sisombululo, yongeza amanzi ukwenza kanye i-50 mL, kwaye usebenzise esi sisombululo njengesisombululo esiqhelekileyo.Yenza uvavanyo ngezi zisombululo njengoko kuqondiswe phantsi kwe-Thin-layer Chromatogra-phy<2.03>.Indawo ye-5mL nganye yesisombululo sesampulu kunye nesisombululo se-stand-ard kwi-plate ye-silica gel ye-chromatog-raphy encinci, iphuhlise ngomxube we-1-butanol, amanzi kunye ne-aceticacid (100) (3: 1: 1) ukuya umgama omalunga ne-10 cm, kunye neplate yomisa kwi-809C imizuzu engama-30.Sitshiza ngokulinganayo isisombululo se-nin-hydrin kumxube we-methanol kunye ne-acetic acid (100) (97: 3) (1 nge-100), kunye nobushushu kwi-80 ℃ imizuzu eyi-10: indawo ngaphandle kwendawo eyintloko efunyenwe kunye nesampuli. isisombululo asinamandla ngaphezu kwendawo efunyenwe ngesisombululo esisemgangathweni.
Ilahleko ekomisweni <2.41> Akukho ngaphezu kwe-0.30% (1 g, 105℃,3 iiyure).
Intsalela kwi-Ignition <2.44> Akukho ngaphezu kwe-0.1% (1 g).
Uvavanyo Ukala ngokuchanekileyo malunga ne-0.15 g ye-L-Aspartic Acid, eyomisiwe ngaphambili, inyibilika kwi-50 mL yamanzi ngokufudumeza.Emva kokupholisa, i-titrate <2.50> kunye ne-0.1 mo / L i-sodium hydroxide VS (i-potentiometric titration).Yenza ukuzimisela okungenanto ngendlela efanayo, kwaye wenze naluphi na ulungiso oluyimfuneko.
I-mL nganye ye-0.1 mol / L i-sodium hydroxide VS＝13.31 mg ye-C4H7NO4
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