L-Aspartic Acid CAS 56-84-8 (H-Asp-OH) Chiyero 98.5~101.0% Factory High Quality

L-Aspartic Acid, kana yakaomeswa, ine kwete pasi pe98.5% uye kwete kupfuura 101.0% yeL-Aspartic Acid (C4H7NO4).
Tsanangudzo L-Aspartic Acid inoitika sechena, makristasi kana crystalline poda.Inonyungudika zvishoma mumvura, uye isinganyungudika mu ethanol (99.5).Inonyungudika mu dilute hydrochloric acid uye mu 0.2 mol/L sodium hydroxide TS.
Kuzivikanwa Sarudza iyo infrared absorption spectrum yeL-Aspartic Acid sezvakarairwa mu potassium bromide disk nzira pasi peInfrared Spectrophotometry <2.25>, uye enzanisa spectrum neReferensi Spectrum: zvose zvinoratidzira kusimba kwakafanana kwekunyura panhamba imwechete yemafungu.
Optical rotation <2.49> [a]20D: +24.0~+26.0° (2 g, mushure mekuoma, 6 mol/L hydrochloric acid TS, 25 mL, 100 mm).
pH <2.54> Dissolve 0.4 g yeL-Aspartic Acid mu100 mL yemvura nekudziya, uye bvumira kutonhora: pakati pe2.5 ne3.5.
Kuchena (1) Kujeka uye ruvara rwekugadzirisa-Dissolve 1.0 g yeL-Aspartic Acid mu 20 mL ye 1 mol / L hydrochloric acid TS: mhinduro yakajeka uye isina ruvara.
(2) Chloride <1.03>-Dissolve 0.5 g ye L-Aspartic Acid mu 6 mL ye dilute nitric acid uye 20 mL yemvura, wedzera mvura kuita 50 mL, uye ita bvunzo nemhinduro iyi semhinduro yekuedza.Gadzirira mhinduro yekudzora ne 0.30 mL ye0.01 mol/L hydrochloric acid VS (kwete kupfuura 0.021%).
(3) Sulfate <1.14> -Dissolve 0.6 g yeL-Aspartic Acid mu5 mL ye dilute hydrochloric acid uye 30 mL yemvura, wedzera mvura kuita 45 mL, uye wedzera 5 mL ye barium chloride TS.Ita bvunzo nemhinduro iyi semuyedzo mhinduro.Gadzirira mhinduro yekudzora ne 0.35 mL ye 0.005 mol/L sulfuric acid VS, wedzera 5 mL ye dilute hydrochloric acid nemvura kuti uite 45 mL, uye wedzera 5 mL ye barium chloride (kwete kupfuura 0.028 ~).
(4) Ammonium<1.02>—Ita bvunzo ne0.25 g yeL-Aspartic Acid.Gadzirira mhinduro yekutonga ne5.0 mL yeStandard Ammonium Solution (kwete kupfuura 0.02z)
(5) Heavy Metals <1.07>-Enda ne 1.0 g yeL-Aspartic Acid maererano neMethod 4, uye ita muedzo.Gadzirira mhinduro yekutonga ne 1.0 mL yeStandard Lead Solution (kwete kupfuura 10 ppm).
(6)Iron <1.10> -Gadzirira mhinduro yekuedza ne 1.0 g yeL-Aspartic Acid maererano neMethod 1, uye ita testa maererano neMethod A. Gadzirira mhinduro yekugadzirisa ne1.0 mL yeStandard Iron Solution (kwete kupfuura 10 ppm).
(7) Zvinhu Zvinoenderana-Dissolve 0.20 g yeL-AsparticAcid mu 10 mL ye 0.2 mol / L sodium hydroxide TS, uye shandisa mhinduro iyi semuenzaniso wemhinduro.Pipeti 1 mL yemhinduro yemuenzaniso, wedzera mvura kuita 10 mL chaiyo.Pipeti 1 mLof mhinduro iyi, wedzera mvura kugadzira 50 mL chaiyo, uye shandisa mhinduro iyi seyakajairwa mhinduro.Ita bvunzo nemhinduro idzi sekurairwa pasi peThin-layer Chromatogra-phy <2.03>.Spot 5mL yega yega yemuenzaniso mhinduro uye stand-ard mhinduro pandiro yesilica gel ye-tete-layer chromatog-raphy, gadzira nemusanganiswa we1-butanol, mvura uye aceticacid (100) (3:1:1) kusvika chinhambwe chingangoita masendimita gumi, uye omesa theplate pa809C kwemaminitsi makumi matatu.Pfaya zvakaenzana mushonga weni-hydrin mumusanganiswa wemethanol neacetic acid (100) (97:3) (1 mu100), uye kupisa pa80 ℃ kwemaminetsi gumi: nzvimbo kunze kwenzvimbo huru yakawanikwa nemuenzaniso. mhinduro haina kusimba kupfuura nzvimbo inowanikwa neyakajairwa mhinduro.
Kurasikirwa paKuomesa <2.41> Kwete kupfuura 0.30% (1 g, 105℃,3 maawa).
Residue paIgnition <2.44> Kwete kupfuura 0.1% (1 g).
Assay Wema nemazvo nezve 0.15 g yeL-Aspartic Acid, yakamboomeswa, inonyungudika mu50 mL yemvura nekudziya.Mushure mekutonhora, titrate <2.50> ne 0.1 mo/L sodium hydroxide VS (potentiometric titration).Ita chisungo chisina chinhu nenzira imwechete, uye ita chero kururamisa kunodiwa.
Imwe neimwe mL ye0.1 mol/L sodium hydroxide VS＝13.31 mg yeC4H7NO4
Midziyo uye kuchengetedza Containers-Tight midziyo.