β-Cyclodextrin (β-CD) CAS 7585-39-9 Uvavanyo 98.0% ~ 102.0% Factory

Ukujikeleza okuthe ngqo
Thatha le mveliso, ulinganise ngokuchanekileyo, yongeza amanzi ukuze uchithe kwaye uhlambulule ngokomlinganiselo kwisisombululo esiqulethe malunga ne-10 mg nge-1 ml, kwaye unqume ngokomthetho (umgaqo Jikelele we-0621), ukujikeleza okuthe ngqo kwakuyi-159 ° ukuya kwi-164 °.
Ukuxilongwa okwahlukileyo
Thatha malunga ne-0.2g yale mveliso, yongeza i-2ml yesisombululo sovavanyo lwe-Iodine, uyifudumeze kwindawo yokuhlambela yamanzi ukuyinyibilikisa, kwaye uyiyeke ipholile ukuvelisa imvula ephuzi-brown.
Kwichromatogram ebhalwe phantsi kwento yokumisela umxholo, ixesha lokugcinwa kweyona nto iphambili yesisombululo sovavanyo kufuneka lihambelane nexesha lokugcinwa kweyona nto iphambili yesisombululo solawulo.6
I-spectrum yokufunxa i-infrared yale mveliso kufuneka ihambelane naleyo yereferensi yemveliso (umgaqo Jikelele 0402).
Ukungabikho kokungcola
Thatha le mveliso malunga ne-1 g, ukulinganisa okuchanekileyo, yongeza amanzi 100ml ukunyibilika, ngokutsho kwe-UV-visible spectrophotometry (umgaqo jikelele we-0401) ukuzimisela, ukunyanzeliswa kuluhlu lwamaza angama-230 ~ 350nm akufanele kudlule i-0.10, i-absorbsor in the range of wavelength range ye-350 ~ 750nm akufanele idlule ku-0.05.
pH
thabatha i-0.20g yale mveliso, yongeza i-20ml yamanzi ukunyibilika, yongeza i-0.2ml yesisombululo se-potassium chloride egcweleyo, kwaye unqume ngokomthetho (umgaqo jikelele we-0631), ixabiso le-pH kufuneka libe yi-5.0 ~ 8.0.
Ukucaca kunye nombala wesisombululo
Thatha le mveliso 0. 50g, yongeza i-50ml yamanzi ukuchithwa, khangela ngokomthetho (Umthetho Jikelele we-0901 kunye nomgaqo jikelele we-0902), isisombululo kufuneka sicace kwaye singenambala;Kwimeko ye-turbidity, thelekisa kunye ne-No.
I-Chloride
Thatha le mveliso ye-0.39G, ihlolwe ngokomthetho (umgaqo-jikelele we-0801), kunye nesisombululo esiqhelekileyo se-sodium chloride 7.0ml akufanele igxininiswe ngaphezu kwesisombululo sokulawula (0.018%).
Ukunciphisa iswekile
Thatha le mveliso i-1.0 g, umlinganiselo ochanekileyo, yongeza amanzi angama-25ml ukunyibilika, Yongeza isisombululo sovavanyo lwe-alkaline copper tartrate 40tnl, ubilise ngokukhawuleza imizuzu emi-3, ubeke kwindawo yokushisa ebusuku, ukucoca nge-4 # i-funnel yokunyibilika ngokuthe nkqo, i-precipitate ihlanjwe ngamanzi afudumeleyo. de isisombululo sokuhlamba singathathi hlangothi.I-filtrate kunye nesisombululo sokuhlamba salahlwa, ngelixa sitshisa nge-potassium permanganate titration solution (0 .0M ol / L) titration.Ngokwemveliso eyomileyo, ukusetyenziswa kwe-potassium permanganate titrant (0.02 Mol / l) nge-L g akufanele kudlule i-3.2ml (1.0%).
Cyclohexane
Thatha malunga ne-0.2g yale mveliso, ukulinganisa ngokuchanekileyo, kwibhotile engenanto ephezulu, yongeza isisombululo esisemgangathweni sangaphakathi (thatha inani elifanelekileyo le-dichlorethylene, yongeza i-20% isisombululo se-dimethyl sulfoxide ukwenza isisombululo esiqulethe malunga ne-0.04 kwi-lm l nganye, (Ilungele ) 10.0ml, njengesisombululo sovavanyo;Olunye oluchanekileyo lokulinganisa i-cyclohexane, kunye nesisombululo esisemgangathweni sangaphakathi sokwenza malunga ne-1 l / l equkethe i-cyclohexane 0.078mg yesisombululo, ukulinganisa i-10.0ml kwibhotile engenanto ephezulu njengesisombululo sokulawula. ukumiselwa konyibiliko lwentsalela (umgaqo Jikelele 0861), ikholamu yecapillary ene-100% i-dimethylpolysiloxane njengolwelo olumileyo lusetyenziswa njengekholamu yechromatographic Ubushushu bekholamu ngama-90 ℃, ubushushu bokungena yi-200 ℃, Iqondo lobushushu lesixhobo yi-250℃; izinga lokushisa lokulinganisa laliyi-70 ℃ kwaye ixesha lokulinganisa laliyimizuzu engama-20. Thatha isisombululo sokubhekisela kwi-headpace, idigri yokwahlukana phakathi kweencopho zecandelo ngalinye kufuneka ihambelane nemimiselo.Isisombululo sovavanyo kunye nesisombululo sereferensi ngokulandelanayo sifakwe kwi-headspace, i-chromatogram irekhodwa, kwaye indawo ephakamileyo ibalwa ngokwendlela yomgangatho wangaphakathi.
Ilahleko ekomisweni
Thatha le mveliso, yomile ukuya kwisisindo esingaguqukiyo kwi-105 ℃, ukulahleka kwesisindo akuyi kudlula i-14.0% (umgaqo jikelele we-0831).
Intsalela yokutshisa
I-1.0 g yale mveliso iya kuthathwa ukuze ihlolwe ngokomthetho (umgaqo Jikelele we-0841), kwaye intsalela eseleyo ayiyi kudlula.
Iintsimbi ezinzima
Intsalela eshiywe phantsi kwento yokuthatha intsalela yokutshisa ayiyi kuqulatha ngaphezu kweengxenye ze-10 kwisigidi sentsimbi enzima xa ihlolwe ngumthetho (iMigaqo Jikelele 0821, uMthetho II).
Umda weMicrobial
Le mveliso iya kuthathwa kwaye ihlolwe ngokomthetho (iMimiselo Jikelele ye-1105 kunye ne-1106).Inani elipheleleyo leebhaktheriya ze-aerobic nge-lg yemveliso yovavanyo aliyi kudlula i-100cfu, inani elipheleleyo lokungunda kunye ne-yeasts aliyi kudlula i-100cfu, i-E. Coli akufanele ibonwe.
Ukuzimisela komxholo
Ilinganiswe ngolwelo olusebenzayo lwechromatography (General 0512).
Iimeko zeChromatographic kunye novavanyo lokufaneleka kwenkqubo I-gel ye-silica ye-alkyl ye-alkyl ene-Bond ye-Silane isetyenziswe njenge-filler;I-Water-methanol (85: 15) yayisetyenziswe njengesigaba esihambahambayo;Kwaye umlinganiselo wenziwa nge-differial refractive index detector.Inombolo yepleyiti yethiyori ayikho ngaphantsi kwe-1500 ebalwa njengencopho ye-betal cyclodextrin.
indlela yokuzimisela: thatha malunga ne-50mg yale mveliso, uyilinganise ngokuchanekileyo, uyibeke kwi-flask yokulinganisa i-10ml, yongeza umlinganiselo ofanelekileyo wamanzi ukuze uchithe kwaye udibanise kwisikali, ugubungele kakuhle, kwaye uyisebenzise njengesisombululo sovavanyo, i-10 / xl. yafakwa kwi-chromatograph engamanzi ngokuchanekileyo, kwaye ichromatogram yarekhodwa.Enye i-50mg ye-reference substance ye-betaloc cyclodextrin ilinganiswe ngokuchanekileyo, kwaye indlela efanayo yayisetyenziselwa ukuzimisela.Ngokwendlela esemgangathweni yangaphandle yokubala indawo ephezulu, oko kukuthi.