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

I-Aluminium Monostearate
I-Dihydroxy (stearato) i-aluminium [7047-84-9].
I-Aluminium Monostearate yikhompawundi ye-aluminiyam kunye nomxube we-asidi eqinileyo ye-organic efunyenwe kumafutha, kwaye iqulathe ubukhulu becala imilinganiselo eguquguqukayo ye-aluminiyam monostearate kunye ne-aluminium monopalmitate.Iqulethe ukulingana okungekho ngaphantsi kweepesenti ze-14.5 kwaye ingabi ngaphezu kwe-16.5 ipesenti ye-Al2O3, ibalwa kwisiseko esomileyo.
Ukupakishwa kunye nokugcinwa- Gcina kwizikhongozeli ezivalwe kakuhle.
Isazisi-
A: Fudumeza i-1 g ngomxube we-25 mL yamanzi kunye ne-5 mL ye-hydrochloric acid ngeyure eli-1, utshintshe amanzi njengoko ephuphuma: i-fatty acids iyakhululwa, idada njengomaleko onamafutha phezu kolwelo, kunye namanzi. umaleko uphendula iimvavanyo zeAluminiyam <191>.
B: Hlanganisa ngokusondeleyo i-25 g kunye ne-100 mL ye-ether kwi-flask ye-500-mL, yongeza i-150 mL ye-3 N hydrochloric acid, unamathisele i-condenser epholileyo yamanzi, kwaye ushushu kwi-bath ye-steam phantsi kwe-reflux imizuzu eyi-15.Pholisa, kwaye udlulisele zombini iileya kwisahluli ngoncedo lwe-100 mL eyongezelelweyo ye-ether.Gcoba ngamandla, kwaye uvumele iileyile ukuba zihlukane.Susa umaleko wamanzi, kwaye uhlambe umaleko we-ether kunye nezahlulo ezintathu ze-30-mL zamanzi.Dlulisa umaleko we-ether kwi-beaker encinci, ukufudumala kwibhafu yomphunga de i-ether ibe ngumphunga kwaye i-acids enamafutha icacile, kwaye uyomise i-acids kwi-105 ° imizuzu engama-20: ubushushu bokuqina (jonga i-Fats and Fixed Oils 401) i-acids enamafutha ayikho ngaphantsi kwe-54 °.
Ilahleko ekumiseni <731>-Yomisa kwi-80 kwiiyure ze-16: ilahlekelwa ngaphezu kwe-2.0% yobunzima bayo.
I-Arsenic, Indlela I <211>-Lungisa ukuLungiselela uVavanyo ngolu hlobo lulandelayo.Ukuya kwi-3.75 g yongeza i-12.5 mL ye-hydrochloric acid kunye ne-0.5 mL ye-bromine TS, kunye nokufudumala kwi-bath ye-steam kuze kube ngumaleko ocacileyo weefom ze-asidi ezincibilikile.Yongeza i-50 mL yamanzi, shushu kwipleyiti eshushu de umthamo ube malunga ne-25 mL, kwaye ucoce ngelixa ushushu.Ukupholisa, nciphisa i-filtrate ngamanzi ukuya kwi-50 mL, kwaye kwi-10-mL ye-aliquot yesi sisombululo yongeza i-2.5 mL ye-hydrochloric acid, uze uhlambulule ngamanzi ukuya kwi-55 mL: isisombululo esisiphumo sihlangabezana neemfuno zovavanyo, ukongezwa kwe-20. mL ye-7 N sulphuric acid echazwe kwiNkqubo eshiyiweyo.Umda yi-4 ppm.
Iintsimbi ezinzima-Ukuya kwi-2 g equlethwe kwi-flask ye-250-mL yongeza i-20 mL yamanzi kunye ne-10 mL ye-hydrochloric acid.Beka i-funnel encinci entanyeni yeflask, kwaye ubilise ngobumnene, utshintshe amanzi njengoko uphuphuma, de kube i-fatty acids ihluke kwinqanaba elicacileyo.Pholisa ngokukhawuleza ngokujikeleza phantsi komlambo wamanzi abandayo de i-acids enamafutha iqine.I-Decant ngesihluzo esihlanjwe ngaphambili nge-3 N hydrochloric acid, hlamba de i-filtrate edibeneyo kunye ne-washings ilinganise i-50 mL, kwaye udibanise.Ukuya kwi-20 mL yefiltrate edityanisiweyo yongeza i-6 N ammonium hydroxide, i-dropwise, kude kube yi-turbidity esisigxina.Yongeza i-1 N acetic acid de imvula ivele inyibilike, uze udibanise i-2 mL ngaphezulu, kwaye wongeze amanzi ukwenza i-40 mL.Yongeza i-1.2 mL ye-thioacetamide-glycerin base TS kunye ne-2 mL ye-pH 3.5 i-Acetate Buffer, kwaye uvumele ukuma imizuzu emi-5: nawuphi na umbala omdaka oveliswayo awukho mnyama kunesisombululo sokulawula esilungiselelwe ukusuka kwi-10 mL ye-filtrate edibeneyo kunye ne-2 mL. yeSicombululo seNkokheli esiPhakathi (jonga i-Heavy Metals <231>) equlethe i-10 µg yelothe nge-mL, emva koko ixutywe ngamanzi ukuya kwi-20 mL kwaye iphathwe ngendlela efanayo.Umda ngama-50 µg ngeg.
I-Assay-Ngokuchanekileyo ukulinganisa i-5 g ye-Aluminium Monostearate kwi-crucible egqunyiweyo yeplatinam eyayifuduselwe ngaphambili kwimizuzu ye-20, ipholile phezu kwe-anhydrous magnesium perchlorate, kwaye ilinganiswe.Fudumeza i-crucible evulekileyo ngobumnene, ngaphandle kokuvumela i-specimen ukuba iqhume edangatyeni, kwaye ngokuthe ngcembe wandise ubushushu de umlotha ube mhlophe.Ukutshisa umlotha imizuzu engama-20 emva kokuba i-organic matter isusiwe, kwaye upholile.Yongeza i-15 mL yamanzi, gubungela i-crucible ngeglasi yokubukela encinci, kwaye ubilise ngobumnene imizuzu emi-5, usebenzisa intonga encinci yokuqhawula naziphi na izigaqa ezinkulu zomlotha.Decant isisombululo ngephepha lokucoca elingenamthuthu, ugcine uninzi lomlotha kwi-crucible.Phinda ukukhutshwa kwamanzi kabini, ugqithise izisombululo ngesihluzo esifanayo.Dlulisa umlotha kwisihluzo ngokusebenzisa umlambo ococekileyo wamanzi, kwaye uhlambe i-crucible kunye nentsalela kathathu ngamanzi afudumeleyo.Dlulisa iphepha lokucoca kunye nentsalela kwi-crucible, yome, kwaye uvutha imizuzu engama-20 emva kokuba iphepha lokucoca litshise.Ukulandela ixesha lokutshisa, gubungela i-crucible, upholile phezu kwe-anhydrous magnesium perchlorate imizuzu ye-15, kwaye ulinganise intsalela ye-Al2O3 ngokukhawuleza.Phinda ukhanyise kude kube bubunzima obuqhubekayo, usebenzisa i-20 yemizuzu yokutshisa kunye nemizuzu eyi-15 yokupholisa.Ukususela kubunzima bentsalela eseleyo kwi-crucible, bala umxholo we-Al2O3.