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

L-Aspartic Acid, ikauma, imakhala ndi osachepera 98.5% komanso osapitirira 101.0% ya L-Aspartic Acid (C4H7NO4).
Kufotokozera L-Aspartic Acid imapezeka ngati yoyera, makhiristo kapena ufa wacrystalline.Imasungunuka pang'ono m'madzi, ndipo imakhala yosasungunuka mu ethanol (99.5).Imasungunuka mu dilute hydrochloric acid ndi 0.2 mol/L sodium hydroxide TS.
Chizindikiritso Dziwani kuchuluka kwa mayamwidwe a infrared a L-Aspartic Acid monga momwe amayankhidwira mu njira ya potassium bromide disk pansi pa Infrared Spectrophotometry <2.25>, ndikuyerekeza mawonekedwewo ndi Reference Spectrum: onse amawonetsa kulimba kofanana kwa mayamwidwe amtundu womwewo.
Kuzungulira kwa kuwala <2.49> [a]20D: +24.0~+26.0° (2 g, mutatha kuyanika, 6 mol/L hydrochloric acid TS, 25 mL, 100 mm).
pH <2.54> Sungunulani 0.4 g wa L-Aspartic Acid mu 100 ml ya madzi powotha, ndipo mulole kuti azizire: pakati pa 2.5 ndi 3.5.
Kuyera (1) Kumveka bwino ndi mtundu wa yankho-Sungani 1.0 g ya L-Aspartic Acid mu 20 ml ya 1 mol/L hydrochloric acid TS: yankho liri lomveka bwino komanso lopanda mtundu.
(2) Chloride <1.03>-Sungani 0.5 g ya L-Aspartic Acid mu 6 mL ya dilute nitric acid ndi 20 ml ya madzi, onjezerani madzi kuti mupange 50 mL, ndikuyesani ndi yankho ili ngati yankho loyesera.Konzani njira yowongolera ndi 0.30 mL ya 0.01 mol/L hydrochloric acid VS (osapitirira 0.021%).
(3) Sulfate <1.14>-Sula 0.6 g ya L-Aspartic Acid mu 5 mL ya dilute hydrochloric acid ndi 30 ml ya madzi, onjezerani madzi kuti apange 45 mL, ndi kuwonjezera 5 mL ya barium chloride TS.Chitani mayeso ndi yankho ili ngati yankho loyesa.Konzani njira yothetsera 0.35 mL ya 0.005 mol/L sulfuric acid VS, onjezerani 5 mL wa dilute hydrochloric acid ndi madzi kuti apange 45 mL, ndikuwonjezera 5 mL wa barium chloride (osapitirira 0.028 ~).
(4) Ammonium<1.02>—Yesani mayeso ndi 0,25 g wa L-Aspartic Acid.Konzani njira yowongolera ndi 5.0 mL ya Standard Ammonium Solution (osapitirira 0.02z)
(5) Zitsulo Zolemera <1.07>-Pitirizani ndi 1.0 g ya L-Aspartic Acid molingana ndi Njira 4, ndikuchita mayeso.Konzani njira yowongolera ndi 1.0 mL ya Standard Lead Solution (osapitirira 10 ppm).
(6)Chitsulo <1.10> -Konzani njira yothetsera mayesero ndi 1.0 g ya L-Aspartic Acid molingana ndi Njira 1, ndikuchita mayeso molingana ndi Njira A. Konzani njira yothetsera vutoli ndi 1.0 mL ya Standard Iron Solution (osapitirira 10 ppm).
(7) Zinthu Zogwirizana-Sungani 0,20 g ya L-AsparticAcid mu 10 mL ya 0.2 mol/L sodium hydroxide TS, ndipo gwiritsani ntchito njira iyi ngati njira yothetsera.Chitoliro 1 mL yachitsanzo, onjezerani madzi kuti mupange 10 ml ndendende.Paipi 1 mLof yankho ili, onjezerani madzi kuti mupange 50 ml ndendende, ndipo gwiritsani ntchito yankholi ngati yankho lokhazikika.Chitani mayeso ndi mayankho awa monga momwe akuwongolera pansi pa Thin-layer Chromatogra-phy<2.03>.Tengani 5mL iliyonse yachitsanzo ndi yankho loyimilira pa mbale ya silika gel osakaniza chromatog-raphy, pangani ndi kusakaniza kwa 1-butanol, madzi ndi aceticacid (100) (3:1:1) mpaka mtunda wa pafupifupi 10 cm, ndikuwumitsa mbale pa 809C kwa mphindi 30.Utsi wofanana yankho la nin-hydrin mu osakaniza methanol ndi acetic acid (100) (97:3) (1 mu 100), ndi kutentha pa 80 ℃ kwa mphindi 10: malo ena kupatulapo malo amene anapezedwa ndi chitsanzo. yankho silili lamphamvu kuposa malo omwe amapezeka ndi yankho lokhazikika.
Kutaya pa Kuyanika <2.41> Osapitirira 0.30% (1 g, 105 ℃,3 maola).
Zotsalira pakuyatsa <2.44> Osapitirira 0.1% (1 g).
Kuyeza Kuyeza molondola pafupifupi 0.15 g wa L-Aspartic Acid, zouma kale, sungunuke mu 50 ml ya madzi powotha.Pambuyo kuzirala, titrate <2.50> ndi 0.1 mo/L sodium hydroxide VS (potentiometric titration).Chitani chitsimikiziro chopanda kanthu mwanjira yomweyo, ndipo pangani kukonza kulikonse kofunikira.
ML iliyonse ya 0.1 mol/L sodium hydroxide VS＝13.31 mg ya C4H7NO4
Zotengera ndi zosungirako Zotengera-Zolimba zolimba.