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

Aluminium Monostearate
Dihydroxy(stearato)aruminiyamu [7047-84-9].
Aluminium Monostearate musanganiswa wealuminiyamu nemusanganiswa weakasimba organic acids inowanikwa kubva kumafuta, uye inonyanya kusiyanisa zviyero zvealuminium monostearate uye aluminium monopalmitate.Iine yakaenzana kwete pasi pe14,5 muzana uye kwete kupfuura 16.5 muzana yeAl2O3, yakaverengerwa pane yakaomeswa.
Kurongedza uye kuchengetedza- Chengetedza mumidziyo yakavharwa zvakanaka.
Identification-
A: Pisa 1 g nemusanganiswa we 25 mL yemvura uye 5 mL yehydrochloric acid kweawa imwe, uchitsiva mvura sezvainoputika: mafuta acids anosunungurwa, anoyangarara semafuta ane mafuta pamusoro pemvura, uye mvura. layer inopindura bvunzo dzeAluminium <191>.
B: Sanganisa zvakanyanya 25 g ne 100 mL ye ether mu 500-mL flask, wedzera 150 mL ye 3 N hydrochloric acid, isa mvura-yakatonhorera condenser, uye kupisa pamvura yekugezera pasi pe reflux kwemaminitsi gumi nemashanu.Kutonhodza, uye endesa zvidimbu zvese kune imwe yekuparadzanisa nerubatsiro rwekuwedzera 100 mL yeether.Kuzunungusa nesimba, uye bvumira kuti zvidimbu zviparadzanise.Bvisa chidimbu chemvura, uye geza ether layer nezvikamu zvitatu zve30-mL zvemvura.Chinja ether layer mubeaker diki, inodziya pabhavhu yekugezera kusvika ether yabuda uye mafuta acids ave pachena, woomesa maasidhi pa105 ° kwemaminetsi makumi maviri: tembiricha yekusimbisa (ona Mafuta uye Fixed Oils 401) fatty acids haisi pasi pe54 °.
Kurasikirwa pakuoma <731> -Dry it pa80 kwemaawa gumi nematanhatu: inorasikirwa kwete kupfuura 2.0% yehuremu hwayo.
Arsenic, Method I <211>-Gadzirira Kugadzirira Kuedza sezvinotevera.Ku 3.75 g wedzera 12.5 mL yehydrochloric acid uye 0.5 mL yebromine TS, uye kupisa pamvura yekugezesa yekugezesa kusvika pakajeka dhizaini yeakanyunguduka fatty acid mafomu.Wedzera 50 mL yemvura, kupisa pandiro inopisa kusvikira vhoriyamu inenge 25 mL, uye sefa ichipisa.Kutonhodza, dilute filtrate nemvura kusvika pa50 mL, uye kune 10-mL aliquot yemhinduro iyi wedzera 2.5 mL yehydrochloric acid, wozonyura nemvura kusvika ku55 mL: mhinduro inoguma inosangana nezvinodiwa zvekuyedzwa, kuwedzera kwe20. mL ye7 N sulfuric acid inotsanangurwa kuMaitiro ari kusiiwa.Muganho ndeye 4 ppm.
Heavy metals-Ku 2 g iri mu 250-mL flask wedzera 20 mL yemvura uye 10 mL yehydrochloric acid.Isa chidimbu chiduku mumutsipa weflask, uye ubike zvinyoro, uchitsiva mvura sezvainoputika, kusvikira mafuta emafuta akaparadzana mumutsara wakajeka.Podza nekukasika nekutenderera pasi pemvura inotonhora kusvika mafuta acids aoma.Decant kuburikidza nesefa yakambogezwa ne3 N hydrochloric acid, geza kusvika iyo yakasanganiswa filtrate newashing yayera 50 mL, wosanganisa.Ku 20 mL yefiltrate yakabatanidzwa wedzera 6 N ammonium hydroxide, inodonha, kusvika huturu hwechigarire hwaita.Wedzera 1 N acetic acid kusvika mvura ichangonyungudika, wobva wawedzera 2 mL yakawandisa, wowedzera mvura kuita 40 mL.Wedzera 1.2 mL ye thioacetamide-glycerin base TS uye 2 mL yepH 3.5 Acetate Buffer, uye bvumira kumira kwemaminitsi mashanu: chero ruvara rwakasvibira rwakagadzirwa haruna kusviba kupfuura iro rekugadzirisa mhinduro yakagadzirwa kubva ku10 mL yefiltrate yakasanganiswa uye 2 mL. yeStandard Lead Solution (ona Heavy Metals <231>) ine 10 µg yemutobvu pa mL, yozocheneswa nemvura kusvika pa20 mL yobatwa nenzira imwecheteyo.Muganho ndeye 50 µg pag.
Assay-Chaizvo kuyera 5 g yeAluminium Monostearate mune yakavharwa platinamu crucible iyo yakambobatidzwa kwemaminetsi makumi maviri, yakatonhodzwa pamusoro peanhydrous magnesium perchlorate, uye yakayerwa.Pisa crucible yakazaruka zvinyoronyoro, usingabvumiri kuti mufananidzo wacho upinde mumoto, uye zvishoma nezvishoma uwedzere kupisa kusvikira dota rachena.Pisa madota kwemaminitsi makumi maviri mushure mekunge organic matter yabviswa, uye inotonhorera.Wedzera 15 mL yemvura, vhara crucible negirazi duku rewachi, uye ugofashaira zvinyoro kwemaminitsi mashanu, uchishandisa kamuti kaduku kakakuchidzira kuputsa mapundu makuru emadota.Decant mhinduro kuburikidza neashless sefa bepa, uchichengeta yakawanda yemadota mucrucible.Dzokorora kudhirowa nemvura kaviri, uchipfuura zvigadziriso kuburikidza nesefa imwechete.Tumira madota kune sefa kuburikidza nerukova rwakanaka rwemvura, uye geza crucible uye zvakasara katatu nemvura inodziya.Chinja pepa resefa uye zvakasara kune crucible, yakaoma, uye pfutidza kwemaminitsi makumi maviri mushure mekunge bepa resefa ratsva.Kutevera nguva yekupisa, vhara crucible, inotonhorera pamusoro peanhydrous magnesium perchlorate kwemaminitsi gumi nemashanu, uye uremedze zvakasara zveAl2O3 nekukurumidza.Dzokorora kupisa kusvikira huremu hwenguva dzose hwawanikwa, uchishandisa maminetsi makumi maviri ekudzimisa nguva uye maminetsi gumi nemashanu ekutonhora nguva.Kubva pahuremu hwezvasara zvakasara mucrucible, verenga zvinyorwa zveAl2O3.