I-Aluminium Monostearate CAS 7047-84-9 Assay (Al2O3) 14.5~16.5%

I-Aluminium Monostearate
I-Dihydroxy(stearato) aluminium [7047-84-9].
I-Aluminium Monostearate iyinhlanganisela ye-aluminium enengxube ye-organic acid eqinile etholakala emafutheni, futhi iqukethe ikakhulukazi izilinganiso eziguquguqukayo ze-aluminium monostearate ne-aluminium monopalmitate.Iqukethe okulingana okungengaphansi kwamaphesenti angu-14.5 futhi hhayi ngaphezu kwamaphesenti angu-16.5 we-Al2O3, abalwe ngesisekelo esomisiwe.
Ukupakisha nokugcina- Londoloza ezitsheni ezivalwe kahle.
Ukuhlonza-
A: Shisisa i-1 g ngengxube engama-25 mL wamanzi no-5 mL we-hydrochloric acid ihora elingu-1, esikhundleni samanzi njengoba ehwamuka: ama-fatty acids ayakhululwa, antanta njengongqimba olunamafutha ebusweni boketshezi, namanzi. ungqimba luphendula ukuhlolwa kwe-Aluminium <191>.
B: Hlanganisa ngokuseduze u-25 g no-100 mL we-ether ku-500-mL flask, engeza u-150 mL we-3 N hydrochloric acid, unamathisele i-condenser epholile ngamanzi, bese ushisa kubhavu we-steam ngaphansi kwe-reflux imizuzu engu-15.Pholisa, bese udlulisela zombili izendlalelo kusihlukanisi ngosizo lwe-100 mL eyengeziwe ye-ether.Shake ngamandla, futhi uvumele izendlalelo ukuba zihlukane.Susa ungqimba lwamanzi, bese ugeza ungqimba lwe-ether ngezingxenye ezintathu zamanzi ezingama-30-mL.Dlulisela ungqimba lwe-ether kubhika omncane, kufudumale kubhavu wesitimu kuze kube yilapho i-ether iyahwamuka futhi ama-acids anamafutha acacile, bese womisa ama-acids ku-105 ° imizuzu engu-20: izinga lokushisa eliqinile (bheka Amafutha Namafutha Agxilile 401) ama-fatty acids awekho ngaphansi kuka-54°.
Ukulahlekelwa ekumisweni <731>-Yomise ku-80 amahora angu-16: ilahlekelwa ngaphezu kuka-2.0% wesisindo sayo.
I-Arsenic, Indlela I <211>-Lungiselela Ukulungiselela Ukuhlolwa ngendlela elandelayo.Ku-3.75 g engeza u-12.5 mL we-hydrochloric acid no-0.5 mL we-bromine TS, futhi ushise kubhavu we-steam kuze kube ungqimba olusobala lwe-acid encibilikisiwe yamafutha.Faka u-50 ml wamanzi, ushise epuleti elishisayo kuze kube yilapho ivolumu iba ngu-25 mL, bese uhlunga ngenkathi kushisa.Pholisa, hlambulula i-filtrate ngamanzi ibe ngu-50 mL, futhi ku-aliquot ye-10-mL yalesi sixazululo engeza u-2.5 mL we-hydrochloric acid, bese uhlanza ngamanzi ku-55 mL: isixazululo esiphumayo sihlangabezana nezidingo zokuhlolwa, ukungezwa kwama-20. mL ka-7 N sulfuric acid ecaciswe Inqubo ekhishwayo.Umkhawulo ngu-4 ppm.
Izinsimbi ezinzima-Ku-2 g equkethwe ku-flask engu-250-mL engeza u-20 mL wamanzi no-10 mL we-hydrochloric acid.Faka ifaneli encane entanyeni yeflask, bese ubilisa ngobumnene, esikhundleni samanzi njengoba ehwamuka, kuze kube yilapho ama-fatty acids ehlukana ungqimba olucacile.Pholisa ngokushesha ngokuzungezisa ngaphansi kwamanzi abandayo kuze kube yilapho ama-acid anamafutha aqina.Nciphisa ngesisefo esigezwe ngaphambilini nge-3 N hydrochloric acid, geza kuze kube yilapho isihlungi esihlanganisiwe neziwashwa zilinganisa u-50 mL, bese uxuba.Ku-20 mL we-filtrate ehlanganisiwe engeza u-6 N ammonium hydroxide, usuka phansi, kuze kube yilapho kuvela i-turbidity engapheli.Engeza i-N acetic acid engu-1 kuze kube yilapho imvula ivele incibilike, bese wengeza u-2 mL ngokweqile, bese wengeza amanzi ukwenza u-40 mL.Engeza u-1.2 mL we-thioacetamide-glycerin base TS kanye no-2 mL we-pH 3.5 Acetate Buffer, bese uvumela ukuma imizuzu engu-5: noma yimuphi umbala onsundu okhiqizwayo awukho mnyama kunalowo wesixazululo sokulawula esilungiswe kusukela ku-10 mL we-filtrate ehlanganisiwe no-2 mL. Yesixazululo Esijwayelekile Sokuhola (bona I-Heavy Metals <231>) equkethe u-10 µg womthofu ngemL ngayinye, bese ihlanjululwa ngamanzi ibe ngu-20 mL futhi iphathwe ngendlela efanayo.Umkhawulo ngu-50 µg ngeg.
I-Assay-Inesisindo esinembile esingu-5 g we-Aluminium Monostearate ku-platinum crucible emboziwe eye yashiswa ngaphambilini imizuzu engu-20, yapholiswa phezu kwe-anhydrous magnesium perchlorate, futhi yakalwa.Shisisa i-crucible evulekile ngobumnene, ngaphandle kokuvumela isifanekiso siqhume emlilweni, futhi kancane kancane ukwandisa ukushisa kuze kube yilapho umlotha umhlophe.Base umlotha imizuzu engu-20 ngemva kokukhishwa kwezinto eziphilayo, bese upholisa.Faka u-15 ml wamanzi, umboze inhlama ngengilazi yewashi elincane, bese ubilisa ngobumnene imizuzu emi-5, usebenzisa induku encane egovuzayo ukuze uphule noma yiziphi izigaxa ezinkulu zomlotha.Nciphisa ikhambi ngephepha lokuhlunga elingenamlotha, ugcine umlotha omningi ku-crucible.Phinda ukukhishwa ngamanzi kabili, udlulise izixazululo ngesihlungi esifanayo.Dlulisa umlotha kusihlungi ngokusebenzisa umfudlana omuhle wamanzi, futhi ugeze i-crucible kanye nensalela kathathu ngamanzi afudumele.Dlulisa iphepha lokuhlunga kanye nensalela ku-crucible, yomile, bese uvutha imizuzu engu-20 ngemva kokuba iphepha lokuhlunga lishile.Ukulandela isikhathi sokuthungela, vala i-crucible, upholile phezu kwe-anhydrous magnesium perchlorate imizuzu engu-15, bese ukala okusele kwe-Al2O3 ngokushesha.Phinda ukuthungela kuze kube yilapho kutholakala isisindo esiqhubekayo, usebenzisa izikhathi zokubasa eziyimizuzu engu-20 kanye nezikhathi zokupholisa eziyimizuzu engu-15.Kusukela kusisindo sensalela esele ku-crucible, bala okuqukethwe kwe-Al2O3.