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

Aluminium Monostearate
Dihydroxy(stearato) aluminium [7047-84-9].
Aluminium Monostearate ndi gulu la aluminiyamu yokhala ndi zosakaniza zolimba za organic acid zomwe zimachokera kumafuta, ndipo zimakhala ndi magawo osiyanasiyana a aluminium monostearate ndi aluminium monopalmitate.Lili ndi zofanana ndi zosachepera 14.5 peresenti komanso zosapitirira 16.5 peresenti ya Al2O3, yowerengedwa pa maziko owuma.
Kupaka ndi kusunga- Sungani m'mitsuko yotsekedwa bwino.
Chizindikiritso-
A: Kutenthetsa 1 g ndi chisakanizo cha 25 mL madzi ndi 5 mL wa hydrochloric acid kwa ola limodzi, m'malo mwa madzi pamene akutuluka nthunzi: mafuta acids amamasulidwa, akuyandama ngati mafuta osanjikiza pamwamba pa madzi, ndi madzi. wosanjikiza amayankha mayeso a Aluminium <191>.
B: Sakanizani kwambiri 25 g ndi 100 mL wa etha mu botolo la 500-mL, onjezerani 150 mL wa 3 N hydrochloric acid, sungani condenser yoziziritsa madzi, ndi kutentha pamadzi osambira pansi pa reflux kwa mphindi 15.Kuziziritsa, ndi kusamutsa zigawo zonsezo ku cholekanitsa mothandizidwa ndi 100 mL yowonjezera ya ether.Gwirani mwamphamvu, ndikulola kuti zigawozo zilekanitse.Chotsani madzi osanjikiza, ndikutsuka gawo la ether ndi magawo atatu a madzi a 30-mL.Tumizani wosanjikiza wa etha ku beaker yaying'ono, kutentha pamadzi osambira mpaka etha itasungunuka ndipo mafuta acids amveka bwino, ndipo yimitsani ma acid pa 105 ° kwa mphindi 20: kutentha kwamphamvu (onani Mafuta ndi Mafuta Okhazikika 401) mafuta acids si pansi pa 54 °.
Kutaya pakuyanika <731> -Iwunitsani pa 80 kwa maola 16: imataya osapitirira 2.0% ya kulemera kwake.
Arsenic, Njira I <211>-Konzani Kukonzekera Mayeso motere.Ku 3.75 g kuwonjezera 12.5 mL wa hydrochloric acid ndi 0,5 mL wa bromine TS, ndi kutentha pa nthunzi kusamba mpaka mandala wosanjikiza wa anasungunuka mafuta asidi mitundu.Onjezerani 50 ml ya madzi, kutentha pa mbale yotentha mpaka voliyumuyo ili pafupi 25 mL, ndikusefa pamene ikutentha.Kuzizira, chepetsani filtrate ndi madzi mpaka 50 mL, ndi 10-mL aliquot ya yankho ili onjezerani 2.5 mL wa hydrochloric acid, kenako tsitsani ndi madzi mpaka 55 ml: yankho limakwaniritsa zofunikira za mayeso, kuwonjezera 20. mL ya 7 N sulfuric acid yotchulidwa pa Ndondomeko yosiyidwa.Malire ndi 4 ppm.
Zitsulo zolemera-Ku 2 g zomwe zili mu botolo la 250-mL onjezerani 20 ml ya madzi ndi 10 ml ya hydrochloric acid.Ikani kabokosi kakang'ono pakhosi la botolo, ndipo wiritsani pang'onopang'ono, m'malo mwa madzi pamene akutuluka nthunzi, mpaka mafuta acids atapatukana momveka bwino.Ziziziritsani mofulumira pozungulira pansi pa mtsinje wa madzi ozizira mpaka mafuta acids atalimba.Decant kupyolera mu fyuluta yomwe yatsukidwa kale ndi 3 N hydrochloric acid, sambani mpaka sefa ndi zochapira zophatikizidwa zifike 50 mL, ndikusakaniza.Ku 20 ml ya kusefa kophatikizidwa onjezerani 6 N ammonium hydroxide, kutsika, mpaka chipwirikiti chakhazikika.Onjezani 1 N acetic acid mpaka madziwo asungunuke, kenaka onjezerani 2 mL mowonjezera, ndikuwonjezera madzi kuti apange 40 ml.Onjezani 1.2 mL ya thioacetamide-glycerin base TS ndi 2 mL ya pH 3.5 Acetate Buffer, ndipo lolani kuyimirira kwa mphindi 5: mtundu uliwonse wa bulauni womwe umapangidwa sukhala wakuda kuposa wa njira yowongolera yokonzedwa kuchokera ku 10 mL ya kusefera kophatikizidwa ndi 2 mL. ya Standard Lead Solution (onani Heavy Metals <231>) yomwe ili ndi 10 µg ya lead pa mL, kenako imasungunuka ndi madzi kufika 20 ml ndikuchitiridwa chimodzimodzi.Malire ndi 50 µg pa g.
Assay-Kulemera molondola 5 g wa Aluminium Monostearate mu platinamu crucible yomwe idayatsidwa kale kwa mphindi 20, itakhazikika pa anhydrous magnesium perchlorate, ndikuyezedwa.Kutenthetsa crucible yotseguka pang'onopang'ono, osalola kuti chitsanzocho chiwonongeke, ndipo pang'onopang'ono muwonjezere kutentha mpaka phulusa likhale loyera.Yatsani phulusa kwa mphindi 20 pambuyo pochotsa organic, ndikuziziritsa.Onjezerani madzi 15 ml, kuphimba crucible ndi galasi laling'ono la wotchi, ndi wiritsani mofatsa kwa mphindi zisanu, pogwiritsa ntchito ndodo yaing'ono yogwedeza kuti muswe phulusa lalikulu.Decant yankho kudzera phulusa fyuluta pepala, kusunga ambiri phulusa mu crucible.Bwerezani m'zigawozo ndi madzi kawiri, kudutsa njirazo kudzera mu fyuluta yomweyo.Tumizani phulusa ku fyuluta pogwiritsa ntchito mtsinje wabwino wamadzi, ndikutsuka crucible ndi zotsalira katatu ndi madzi ofunda.Tumizani pepala losefera ndi zotsalira ku crucible, zouma, ndi kuyatsa kwa mphindi 20 pepala losefera litayaka.Kutsatira nthawi yoyatsira, kuphimba crucible, kuziziritsa pa anhydrous magnesium perchlorate kwa mphindi 15, ndipo yesani zotsalira za Al2O3 mwachangu.Bwerezani kuyatsa mpaka kulemera kosalekeza kwapezeka, pogwiritsa ntchito mphindi 20 zoyatsira ndi mphindi 15 zozizira.Kuchokera kulemera kwa zotsalira zomwe zatsala mu crucible, kuwerengera zomwe zili mu Al2O3.