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

Aluminum monostearate
Dihydroxy (stearato) aluminum [7047-84-9].
Aluminum Monostearate wani fili ne na aluminium tare da cakuda tsayayyen acid Organic da aka samu daga kitse, kuma ya ƙunshi galibin madaidaitan rabbai na aluminum monostearate da aluminum monopalmitate.Ya ƙunshi kwatankwacin wanda bai gaza kashi 14.5 ba kuma bai wuce kashi 16.5 na Al2O3 ba, ana ƙididdige shi akan busasshiyar tushe.
Marufi da ajiya - Ajiye a cikin kwantena da aka rufe sosai.
Ganewa-
A: Heat 1 g tare da cakuda 25 ml na ruwa da 5 ml na hydrochloric acid don 1 hour, maye gurbin ruwa kamar yadda ya kwashe: fatty acid an 'yantar da, iyo a matsayin m Layer a saman ruwa, da ruwa. Layer amsa ga gwaje-gwaje na Aluminum <191>.
B: Mix 25 g tare da 100 ml na ether a cikin gilashin 500-mL, ƙara 150 ml na 3 N hydrochloric acid, haɗa na'urar sanyaya ruwa, da zafi a kan wanka mai tururi a ƙarƙashin reflux na minti 15.Cool, da canja wurin duka yadudduka zuwa mai raba tare da taimakon ƙarin 100 ml na ether.Girgizawa da ƙarfi, kuma ba da damar yadudduka su rabu.Cire Layer na ruwa, kuma wanke ether Layer tare da kashi uku na 30-mL na ruwa.Canja wurin ether Layer zuwa ƙaramin beaker, dumi a kan wanka mai tururi har sai ether ya ƙafe kuma fatty acids sun bayyana, kuma bushe acid a 105 ° na minti 20: zafin jiki mai ƙarfi (duba Fats and Fixed Oils 401) na Fatty acid ba ya ƙasa da 54 °.
Asarar bushewa <731> - bushe shi a 80 na tsawon sa'o'i 16: ya rasa fiye da 2.0% na nauyinsa.
Arsenic, Hanyar I <211> -Shirya Shirye-shiryen Gwaji kamar haka.Zuwa 3.75 g ƙara 12.5 ml na hydrochloric acid da 0.5 ml na bromine TS, da kuma zafi a kan wani tururi wanka har sai m Layer na narkewa fatty acid form.Ƙara 50 ml na ruwa, zafi a kan farantin zafi har sai girman ya kai kimanin 25 ml, kuma tace yayin zafi.Cool, tsarma da tacewa da ruwa zuwa 50 ml, kuma zuwa 10-mL aliquot na wannan bayani ƙara 2.5 ml na hydrochloric acid, sa'an nan kuma tsarma da ruwa zuwa 55 ml: sakamakon bayani ya hadu da bukatun na gwajin, da ƙari na 20. mL na 7 N sulfuric acid da aka ƙayyade don Tsarin da ake cirewa.Iyakar ita ce 4 ppm.
Karfe masu nauyi-Zuwa 2 g da ke ƙunshe a cikin filaye 250-mL ƙara 20 ml na ruwa da 10 ml na hydrochloric acid.Sanya ƙaramin rami a wuyan filako, kuma a tafasa a hankali, maye gurbin ruwan yayin da yake ƙafe, har sai fatty acid ya rabu a cikin fili mai haske.Yi sanyi da sauri ta juyawa ƙarƙashin rafi na ruwan sanyi har sai fatty acid ɗin ya ƙaru.Yanke ta cikin tacewa da aka wanke a baya tare da 3 N hydrochloric acid, wanke har sai an haɗa tacewa da wankin yana auna 50 ml, sannan a gauraya.Zuwa 20 ml na filtrate ɗin da aka haɗe ƙara 6 N ammonium hydroxide, a juye, har sai turbidity na dindindin ya zama.Ƙara 1 N acetic acid har sai ruwan sama ya narke, sannan ƙara 2 ml fiye da haka, kuma ƙara ruwa don yin 40 ml.Ƙara 1.2 mL na thioacetamide-glycerin tushe TS da 2 mL na pH 3.5 Acetate Buffer, kuma ba da izinin tsayawa na minti 5: duk wani launi mai launin ruwan kasa da aka samar ba ya fi duhu fiye da na wani bayani mai sarrafawa wanda aka shirya daga 10 ml na filtrate pooled da 2 ml Na Daidaitaccen Maganin Gubar (duba Ƙarfe Masu nauyi <231>) mai ɗauke da 10 µg na gubar kowace ml, sannan a diluted da ruwa zuwa 20 ml kuma a bi da su daidai.Matsakaicin shine 50 μg a kowace g.
Assay- Daidai auna nauyin 5 g na Aluminum Monostearate a cikin rufaffen platinum crucible wanda a baya an kunna wuta na mintuna 20, an sanyaya shi akan magnesium perchlorate mara ruwa, kuma an auna shi.Gasa buɗaɗɗen buɗaɗɗen a hankali, ba tare da barin samfurin ya fashe da harshen wuta ba, kuma a hankali ƙara zafi har sai ash ya yi fari.Ƙara ash na minti 20 bayan an cire kwayoyin halitta, kuma a kwantar da hankali.Ƙara 15 ml na ruwa, rufe crucible tare da ƙaramin gilashin agogo, sannan a tafasa a hankali na tsawon minti 5, ta amfani da ƙaramin sanda mai motsawa don karya duk wani babban kullu na ash.Yanke maganin ta takarda tace mara ash, tare da riƙe mafi yawan tokar a cikin crucible.Maimaita hakar tare da ruwa sau biyu, wucewa da mafita ta wannan tacewa.Canja wurin toka zuwa tacewa ta hanyar ruwa mai kyau, sannan a wanke crucible da ragowar sau uku da ruwan dumi.Canja wurin takardar tacewa da ragowar zuwa ga crucible, bushe, da kunna wuta na minti 20 bayan takarda tace ta ƙone.Bayan lokacin ƙonewa, rufe crucible, kwantar da hankali akan magnesium perchlorate mai ƙarancin ruwa na mintuna 15, kuma auna ragowar Al2O3 cikin sauri.Maimaita kunnan wuta har sai an sami nauyi akai-akai, ta amfani da lokutan kunnawa na mintuna 20 da lokacin sanyaya na mintuna 15.Daga nauyin abin da ya rage a cikin crucible, lissafta abin da ke cikin Al2O3.