D-(+)-Xylose CAS 58-86-6 Purity>99.5% (HPLC) Factory High Quality

Xylose ili ndi osachepera 98.0 peresenti komanso osapitirira 102.0 peresenti ya C5H10O5, yowerengedwa pa zouma.
Kupaka ndi kusungirako-Sungani zotengera zolimba pa kutentha kwachipinda.
Miyezo yolozera ya USP <11>-
USP Fructose RS
USP Xylose RS
Mtundu wa yankho-Yankho lomwe lakonzedwa kumene (1 mu 10) ndi lomveka komanso lopanda mtundu.
Chizindikiritso-
A: Infrared mayamwidwe <197A>.
B: Nthawi yosungira pachimake chachikulu mu chromatogram ya Kukonzekera kwa Assay ikufanana ndi yomwe ili mu chromatogram ya Kukonzekera kwa Standard, monga momwe zapezedwa mu Assay.
Kusinthasintha kwachindunji <781S>: pakati pa +18.2 ° ndi +19.4 °.
Njira yothetsera mayeso: 100 mg pa mL, mu 0.012 N ammonium hydroxide.
Kutaya pakuyanika <731> -Dry 2 g mpaka 5 g pa kuthamanga kosapitirira 50 mm wa mercury pa 60 ° mpaka kulemera kosalekeza, mpweya wouma umadutsa mu uvuni panthawi yowumitsa kuchotsa mpweya wa madzi: umataya osapitirira 0.1% ya kulemera kwake.
Zotsalira pakuyatsa <281>: osapitirira 0.05%.
Chitsulo <241> -Sungani 2.0 g mu 45 mL ya madzi, ndi kuwonjezera 2 mL ya hydrochloric acid: malire ndi 5 ppm
Zitsulo zolemera <231> -Sungani 2.0 g m'madzi kuti mupange 25 ml ya yankho: malire ndi 0.001%.
Chromatographic purity-Gwiritsani ntchito chromatogram ya kukonzekera kwa Assay, yomwe idapezedwa monga momwe idalembedwera mu Assay.Kuwerengera kuchuluka kwa zonyansa za munthu aliyense, kupatula nsonga zosungunulira, mu gawo la Xylose lomwe latengedwa:
100 (ri / rS)
momwe ri ndi yankho la munthu aliyense wosadetsedwa;ndipo rS ndiye chiŵerengero cha mayankho onse mu chromatogram: osapitirira 1.0% ya zonyansa zapayekha zomwe zimapezeka, ndipo kuchuluka kwa zonyansa zonse zomwe zapezeka sizikupitilira 2.0%.
Kuyesa-
Mobile phase-Gwiritsani ntchito chisakanizo cha degassed cha acetonitrile ndi madzi (75:25).
Njira yothetsera kuyenerera kwa dongosolo-Konzani yankho mu gawo la Mobile, lomwe lili ndi pafupifupi 10 mg ya USP Xylose RS ndi 0.2 mg ya USP Fructose RS pa mL.
Kukonzekera kokhazikika-Sungani muyeso woyezedwa bwino wa USP Xylose RS mu gawo la Mobile kuti mupeze yankho lodziwika bwino la pafupifupi 10 mg pa mL.
Kukonzekera koyesa-Kusamutsa za 100 mg ya Xylose, yoyezedwa molondola, ku botolo la volumetric 10-mL, sungunulani ndi kusungunula ndi gawo la Mobile mpaka voliyumu, ndi kusakaniza.
Chromatographic system (onani Chromatography <621>) - Chromatograph yamadzimadzi imakhala ndi chowunikira cha 192-nm ndi ndime ya 4.6-mm × 15-cm yomwe ili ndi zonyamula L8.Kutentha kwapakati kumasungidwa pa 30 °, ndipo kuthamanga kwake kumakhala pafupifupi 2 mL pamphindi.Chromatograph the System kuyenerera yankho, ndi kulemba mayankho pachimake monga momwe anayankhira Njira: kusamvana, R, pakati pa nsonga za xylose ndi fructose sikuchepera 2.0.Kupatuka kwapang'onopang'ono kwa jakisoni wobwereza sikudutsa 2.0%.
Kachitidwe-Payokha jekeseni ma voliyumu ofanana (pafupifupi 25 µL) ya kukonzekera kwa Assay ndi kukonzekera kwa Standard mu chromatograph, lembani ma chromatogram, ndikuyesa mayankho a nsonga zazikulu.Werengani kuchuluka, mu mg, wa C5H10O6, mu gawo la Xylose lotengedwa ndi formula:
10C (rU / rS)
momwe C ndi ndende, mu mg pa mL, wa USP Xylose RS mu kukonzekera Standard;ndi rU ndi rS ndiwo mayankho apamwamba omwe apezedwa kuchokera ku kukonzekera kwa Assay ndi kukonzekera kwa Standard, motsatana.