I-L-Aspartic Acid CAS 56-84-8 (H-Asp-OH) Isivivinyo 98.5~101.0% Ifektri Yekhwalithi Ephezulu

I-L-Aspartic Acid, uma yomisiwe, iqukethe okungaphansi kuka-98.5% futhi hhayi ngaphezu kuka-101.0% we-L-Aspartic Acid (C4H7NO4).
I-L-Aspartic Acid yenzeka imhlophe, icwecwe noma i-crystalline powder.Incibilika kancane emanzini, futhi ayincibiliki ku-ethanol (99.5).Incibilika ku-dilute hydrochloric acid naku-0.2 mol/L i-sodium hydroxide TS.
Ukuhlonza Thola i-spectrum yokumuncwa kwe-infrared ye-L-Aspartic Acid njengoba kuqondiswe endleleni yediski ye-potassium bromide ngaphansi kwe-Infrared Spectrophotometry <2.25>, futhi uqhathanise i-spectrum ne-Reference Spectrum: kokubili i-spectraexhibit ukuqina okufanayo kokumuncwa ezinombolweni zamagagasi afanayo.
Ukuzungezisa kwamehlo <2.49> [a]20D: +24.0~+26.0° (2 g, ngemva kokomiswa, 6 mol/L hydrochloric acid TS, 25 mL, 100 mm).
pH <2.54> Chaza u-0.4 g we-L-Aspartic Acid ku-100 mL wamanzi ngokufudumeza, futhi uvumele kuphole: phakathi kuka-2.5 no-3.5.
Ukuhlanzeka (1) Ukucaca nombala wesixazululo-Diza i-1.0 g ye-L-Aspartic Acid ku-20 mL we-1 mol/L i-hydrochloric acid TS: isixazululo sicacile futhi asinambala.
(2) I-Chloride <1.03>-Chaza u-0.5 g we-L-Aspartic Acid ku-6 mL we-nitric acid ehlanjululwe kanye no-20 mL wamanzi, engeza amanzi ukuze wenze u-50 mL, futhi wenze ukuhlolwa ngalesi sixazululo njengesixazululo sokuhlola.Lungiselela isixazululo sokulawula ngo-0.30 mL ka-0.01 mol/L we-hydrochloric acid VS (hhayi ngaphezu kuka-0.021%).
(3) I-Sulfate <1.14>-Dissolve 0.6 g ye-L-Aspartic Acid ku-5 mL ye-dilute hydrochloric acid kanye no-30 mL wamanzi, engeza amanzi ukuze wenze u-45 mL, bese wengeza u-5 mL we-barium chloride TS.Yenza ukuhlolwa ngalesi sixazululo njengesixazululo sokuhlola.Lungisa ikhambi lokulawula ngo-0.35 mL we-0.005 mol/L sulfuric acid VS, engeza u-5 mL we-dilute hydrochloric acid namanzi ukwenza u-45 mL, bese wengeza u-5 mL we-barium chloride (hhayi ngaphezu kuka-0.028 ~).
(4) I-Ammonium<1.02>—Yenza ukuhlola ngo-0.25 g we-L-Aspartic Acid.Lungiselela ikhambi lokulawula ngo-5.0 mL we-Standard Ammonium Solution (hhayi ngaphezu kuka-0.02z)
(5) Izinsimbi Ezisindayo <1.07>-Qhubeka no-1.0 g we-L-Aspartic Acid ngokweNdlela yesi-4, futhi wenze ukuhlolwa.Lungiselela isixazululo sokulawula ngo-1.0 mL we-Standard lead Solution (hhayi ngaphezu kuka-10 ppm).
6 ppm).
(7) Izinto Ezihlobene-Chaza u-0.20 g we-L-AsparticAcid ku-10 mL ka-0.2 mol/L i-sodium hydroxide TS, futhi usebenzise lesi sixazululo njengesampula yesixazululo.Ipayipi elingu-1 mL lesixazululo sesampula, engeza amanzi ukwenza u-10 mL ngqo.Ipayipi elingu-1 mLof lesi sixazululo, engeza amanzi ukuze wenze u-50 mL ncamashi, bese usebenzisa lesi sixazululo njengesixazululo esijwayelekile.Yenza ukuhlolwa ngalezi zixazululo njengoba kuqondiswe ngaphansi kwe-Thin-layer Chromatogra-phy<2.03>.Faka i-5mL ngayinye yesixazululo sesampula kanye nesisombululo esiqinile epuletini lejeli yesilika ukuze uthole ungqimba oluncane lwe-chromatog-raphy, thuthukisa ngengxube ye-1-butanol, amanzi ne-aceticacid (100) (3:1:1) kuya Ibanga elingaba ngu-10 cm, bese sula ipuleti ku-809C imizuzu engama-30.Fafaza ngokulinganayo isixazululo se-nin-hydrin enhlanganisweni ye-methanol ne-acetic acid (100) (97:3) (1 ku-100), bese ushisa ku-80℃ imizuzu eyi-10: indawo ngaphandle kwendawo eyinhloko etholwe nesampula. Isixazululo asishubi ngaphezu kwendawo etholwe ngesixazululo esijwayelekile.
Ukulahlekelwa Ekumisweni <2.41> Hhayi ngaphezulu kuka-0.30% (1 g, 105℃,3 amahora).
Insalela Ekuthutheni <2.44> Ayidluli ku-0.1% (1 g).
I-Assay Kala ngokunembile cishe u-0.15 g we-L-Aspartic Acid, omisiwe ngaphambilini, ncibilika ku-50 mL wamanzi ngokufudumeza.Ngemva kokupholisa, i-titrate <2.50> nge-0.1 mo/L i-sodium hydroxide VS (i-potentiometric titration).Yenza isinqumo esingenalutho ngendlela efanayo, futhi wenze noma yikuphi ukulungisa okudingekayo.
I-mL ngayinye ka-0.1 mol/L i-sodium hydroxide VS＝13.31 mg ye-C4H7NO4
Iziqukathi nokugcina Iziqukathi-Tight iziqukathi.