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

L-Aspartic Acid, ina whakamarokehia, kaua e iti iho i te 98.5%, kaua hoki e neke ake i te 101.0% o te L-Aspartic Acid (C4H7NO4).
Whakaahuatanga L-Aspartic Acid ka puta he ma, he kiripiri te paura orcrystalline.He iti te wairewa i roto i te wai, me te kore e rewa i te waiwaro (99.5).Ka memeha ki roto i te waikawa puota waimeha me te 0.2 mol/L konutai waiwai TS.
Te Tautuhinga Whakatauhia te tuāwhiorangi whakauru infrared o te L-Aspartic Acid e tohutohuhia ana i te tikanga kōpae pāhare pāporo bromide i raro i te Spectrophotometry Infrared <2.25>, ka whakatairitehia te tūāwhiorangi ki te Tūāwhiorangi Tohutoro: ka whakaatuhia e te tūāwhiorangi he rite te kaha o te horonga i te tau ngaru kotahi.
Te hurihanga whatu <2.49> [a]20D: +24.0~+26.0° (2 g, i muri i te whakamaroketanga, 6 mol/L waikawa pūmāota TS, 25 mL, 100 mm).
pH <2.54> Whakarewahia te 0.4 g o te L-Aspartic Acid ki te 100 mL wai ma te whakamahana, ka tuku kia whakamatao: i waenga i te 2.5 me te 3.5.
Te Maama (1) Te maama me te tae o te otinga-Whakarewa 1.0 g o te L-Aspartic Acid i roto i te 20 mL o te 1 mol/L waikawa pūhaumāota TS: he maamaa, he kore tae te otinga.
(2) Chloride <1.03>-Warekahia te 0.5 g o te L-Aspartic Acid i roto i te 6 mL o te waikawa nitric dilute me te 20 mL o te wai, tāpirihia te wai kia 50 mL, ka mahia te whakamatautau me tenei otinga hei otinga whakamatautau.Whakapaia te otinga whakahaere me te 0.30 mL o te 0.01 mol/L waikawa pūhaumāota VS (kaua e neke ake i te 0.021%).
(3) Sulfate <1.14>-Warekahia te 0.6 g o te L-Aspartic Acid ki roto i te 5 mL o te waikawa pūhaumāota waimeha me te 30 mL o te wai, tāpirihia te wai kia 45 mL, ka tāpirihia te 5 mL o te barium chloride TS.Mahia te whakamatautau me tenei otinga hei otinga whakamatautau.Whakaritehia te otinga mana ki te 0.35 mL o te 0.005 mol/L waikawa pungatara VS, tāpirihia te 5 mL o te waikawa pūmāota waimeha me te wai kia 45 mL, ka tāpirihia te 5 mL o te barium chloride (kaua e neke ake i te 0.028~).
(4) Ammonium<1.02>—Mahia te whakamatautau me te 0.25 g o te L-Aspartic Acid.Whakapaia te otinga mana me te 5.0 mL o te Waihanga Haukini Paerewa (kaua e neke ake i te 0.02z)
(5) Heavy Metals <1.07>-Haere ki te 1.0 g o te L-Aspartic Acid kia rite ki te Tikanga 4, ka mahi i te whakamatautau.Whakapaia te otinga mana me te 1.0 mL o te Wairewa Aratohu Paerewa (kaua e neke ake i te 10 ppm).
(6) Rino <1.10>-Whakaritea te otinga whakamatautau me te 1.0 g o te L-Aspartic Acid kia rite ki te Tikanga 1, ka mahi i te whakamatautau kia rite ki te Tikanga A. Whakaritea te otinga whakahaere me te 1.0 mL o te Waahanga Rino Paerewa (kaua e neke atu i te 10). ppm).
(7) Nga matū e pa ana-Whakarewahia te 0.20 g o te L-AsparticAcid ki te 10 mL o te 0.2 mol/L konutai waikawa TS, ka whakamahi i tenei otinga hei tauira otinga.Pipeto 1 mL o te tauira otinga, tāpirihia he wai kia rite te 10 mL.Pipet 1 mL mai i tenei wairewa, tapirihia he wai kia rite ki te 50 mL, ka whakamahi i tenei otinga hei otinga paerewa.Mahia te whakamatautau me enei otinga i raro i te Thin-layer Chromatogra-phy<2.03>.Tuhia te 5mL o ia tauira otinga me te wairewa tu-tu ki runga i te pereti kirikiri mo te chromatog-raphy paparanga angiangi, hangaia me te ranunga o te 1-butanol, te wai me te aceticacid (100) (3:1:1) ki te 10 cm te tawhiti, ka whakamarokehia te pereti ki te 809C mo te 30 meneti.Ringihia he wairewa nin-hydrin i roto i te ranunga o te methanol me te waikawa acetic (100) (97:3)(1 i roto i te 100), ka whakamahana i te 80 ℃ mo te 10 meneti: te waahi i tua atu i te waahi matua i whiwhi mai i te tauira Ko te otinga kaore i te kaha ake i te waahi ka riro mai i te otinga paerewa.
Ngaronga i te whakamaroke <2.41> Kaua e neke ake i te 0.30% (1 g, 105℃, 3 haora).
Te toenga i runga i te mura <2.44> Kaua e neke ake i te 0.1% (1 g).
Whakamaatau Kia tika te pauna mo te 0.15 g o te L-Aspartic Acid, kua maroke i mua, ka memeha ki te 50 mL wai ma te whakamahana.Whai muri i te whakamataotanga, titrate <2.50> ki te 0.1 mo/L konutai hydroxide VS (potentiometric titration).Kia rite tonu te mahi i tetahi whakatau paatea, me te whakatika i nga mea e tika ana.
Ia mL o te 0.1 mol/L konutai waihā VS＝13.31 mg o C4H7NO4
Ipu me te rokiroki Ipu-Tight ipu.