L-Valine CAS 72-18-4 (H-Val-OH) Assay 98.5~101.0% Factory High Quality

L-Valine (H-Val-OH) (CAS: 72-18-4) AJI 97 Tikanga Whakamatau
Tautuhinga: Whakatauritea te awhiowhiotanga infrared absorption o te tauira ki tera o te paerewa ma te tikanga kōpae pāhare pāporo bromide.
Hurihuri Tau [α]20/D: Tauira maroke, C=8, 6mol/L HCl
State of Solution (Transmittance): 0.5g i roto i te 20ml o H2O, spectrophotometer, 430nm, 10mm te matotoru pūtau.
Chloride (Cl): 0.7g, A-1, ref: 0.40ml o 0.01mol/L HCl
Haukinia (NH4): B-2
Putakawa (SO4): 1.2g, (1), ref: 0.50ml o 0.005mol/L H2SO4
Rino (Fe): 1.5g, (2), ref: 1.5ml o Iron Std.(0.01mg/ml)
Nga Kourarahi Taumaha (Pb): 2.0g, (2), ref: 2.0ml o Pb Std.(0.01mg/ml)
Arsenic (As2O3): 2.0g, (2), ref: 2.0ml o As2O3 Std.
Ētahi atu waikawa amino: dilute haukini R2 Tauira Whakamātautau: 50μg, F-6-a, mana: L-Tyr 0.25μg
Ngaronga i te whakamaroke: i te 105 ℃ mo te 3 haora.
Te toenga i runga i te mura (Sulfated): AJI Test 13
Te whakamatautau: Tauira maroke, 120mg, (1), 3ml o te waikawa formic, 50ml o te waikawa ahetiki hukapapa, 0.1mol/L HCLO4 1ml=11.715mg C5H11NO2
Whakamātautau pH: 1.0g i te 20ml o H2O

L-Valine (H-Val-OH) (CAS: 72-18-4)JP16 Tikanga Whakamatau
L-Valine, ina whakamaroke, kaua e iti iho i te 98.5% o C5H11NO2.
Whakaahuatanga Ko te L-Valine he kiripiri ma, he paura tioata ranei.He kakara, he ahua ngoikore ranei, he paku reka te reka, ka kawa.
He memeha noa ki te waikawa formic, he memeha ki te wai, he kore noa ki te waiwaro (95).
Ka memeha ki roto i te waikawa puota waimeha.
Te Tautuhinga Whakatauhia te tuāwhiorangi whakauru infrared o L-Valine, i whakamarokehia i mua, pera i te whakahau i roto i te tikanga kōpae pāhare pāporo i raro i te Spectrophotometry Infrared <2.25>, ka whakatairitehia te tūāwhiorangi ki te Tūāwhiorangi Tohutoro: e whakaatu ana ngā tūāwhiorangi e rua i te kaha o te momi i te tau ngaru kotahi .
Te hurihanga whatu <2.49> [a]20D: +26.5°~+29.0° (i muri i te whakamaroketanga, 2 g, 6 mol/L waikawa pūhaumāota TS, 25 mL, 100 mm).
pH <2.54> Whakarewahia te 0.5 g o L-Valine ki te 20 mL wai: ko te pH o tenei otinga kei waenganui i te 5.5 me te 6.5.
Te Maama (1) Te maama me te tae o te otinga Whakarewahia te 0.5 g o L-Valine ki te 20 mL wai: he maamaa te otinga, he kore tae.
(2) Chloride <1.03>-Mahia te whakamatautau me te 0.5 g o L-Valine.Whakapaia te otinga whakahaere me te 0.30 mL o te 0.01mol/L waikawa pūhaumāota VS (kaua e neke ake i te 0.021%).
(3) Sulfate <1.14>-Mahia te whakamatautau me te 0.6 g o L-Valine.Whakaritehia te otinga whakahaere me te 0.35 mL o te 0.005mol/L waikawa pungatara VS (kaua e neke ake i te 0.028%).
(4) Ammonium <1.02>-Mahia te whakamatautau me te 0.25 g o L-Valine.Whakapaia te otinga mana me te 5.0 mL o te Waihanga Haukini Paerewa (kaua e neke ake i te 0.02%).
(5) Nga konganuku taumaha <1.07>-Haere ki te 1.0 g o L-Valine kia rite ki te Tikanga 1, ka mahia te whakamatautau.Whakapaia te otinga mana me te 2.0 mL o te Wairewa Aratohu Paerewa (kaua e neke ake i te 20 ppm).
(6) Arsenic <1.11>-Haere ki te 1.0g o L-Valine, whakarite te otinga whakamatautau kia rite ki te Tikanga 2, ka mahia te whakamatautau (kaua e neke ake i te 2 ppm).
(7) Nga matū e pa ana-Whakarewahia te 0.10 g o L-Valine ki te 25mL wai, ka whakamahi i tenei otinga hei tauira otinga.Pipeto 1 mL o te tauira otinga, ka tapirihia he wai kia 50 mL.Pipeto 5 mL o tenei wairewa, tapirihia he wai kia rite ki te 20 mL, ka whakamahi i tenei otinga hei otinga paerewa.Mahia te whakamatautau me enei rongoatanga pera i te whakahau i raro i te Thin-layer Chromatography <2.03>.Tuhia te 5mL o ia tauira otinga me te otinga paerewa ki runga i te pereti kirikiri mo te chromatography paparanga angiangi.Whakawhanakehia te pereti me te ranunga o te 1-butanol, te wai me te waikawa ahetiki (100) (3:1:1) ki te 10 cm te tawhiti, ka whakamaroke i te pereti i te 80 ℃ mo te 30 meneti.Mahia kia rite te wairewa ninhydrin i roto i te acetone (1 i roto i te 50) ki runga i te pereti, ka whakamahana i te 80 ℃ mo te 5 meneti: ko nga wahi i tua atu i te waahi matua mai i te tauira otinga kaore i te kaha ake i te waahi 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 0.12 g o L-Valine, kua maroke i mua, ka memeha ki te 3 mL o te waikawa formic, tāpirihia te 50 mL o te waikawa acetic (100), me te titrate <2.50> ki te 0.1 mol/L perchloric acid VS (potentiometric titration) .Whakaritehia he whakatau patea, me te whakatika i nga mea e tika ana.
Ia mL o te 0.1 mol/L waikawa perchloric VS＝11.72 mg o C5H11NO2
Ipu me te rokiroki Ipu-Tight ipu.