Ko te Hydroxypropyl methylcellulose, e mōhiotia whānuitia ana ko te HPMC, he mea whakamahi whānuitia hei tāpiri rongoā me te tāpiri kai. Nā tōna wairewatanga pai, tōna kaha here me ōna āhuatanga hanga kiriata, kua whakamahia whānuitia i roto i te umanga rongoā. E whakamahia whānuitia ana hoki te HPMC i roto i te umanga kai hei whakamātotoru, hei whakapūhui me hei whakaū. He mea tino nui te parakore o te HPMC i roto i ngā umanga rongoā me te kai, nā te mea ka pā ki te whai huatanga me te haumaru o te hua. Ka matapakihia e tēnei tuhinga te whakatau i te parakore o te HPMC me ōna tikanga.
He aha ngā HPMC?
Ko te Hydroxypropylmethylcellulose (HPMC) he ether cellulose i ahu mai i te methylcellulose. Ko tōna taumaha ngota he 10,000 ki te 1,000,000 Daltons, ā, he paura mā, he māwhero rānei, kāore he kakara, kāore hoki he reka. He ngāwari te wairewa o te HPMC ki te wai, ā, ka wairewa anō hoki ki ētahi whakarewa waro pērā i te etanoru, te butanol, me te chloroform. He āhuatanga ahurei ōna pērā i te pupuri wai, te whakamātotoru me te kaha here, e pai ai mō ngā ahumahi rongoā me te kai.
Te whakatau i te parakore o te HPMC
Ko te parakore o te HPMC e whakawhirinaki ana ki ētahi āhuatanga pēnei i te nui o te whakakapinga (DS), te nui o te makuku me te nui o te pungarehu. Ko te DS te tohu o te maha o ngā rōpū hydroxyl kua whakakapia e ngā rōpū hydroxypropyl i roto i te ngota cellulose. Mā te nui o te whakakapinga ka whakanui ake i te wairewatanga o te HPMC, ā, ka whakapai ake i te kaha hanga kiriata. I tetahi atu taha, mā te iti o te whakakapinga ka iti ake te wairewatanga me ngā āhuatanga hanga kiriata ngoikore.
Tikanga Whakatau Parakore HPMC
He maha ngā tikanga hei whakatau i te parakore o te HPMC, tae atu ki te titration waikawa-pūtake, te tātari huānga, te chromatography wai mahi-teitei (HPLC), me te spectroscopy infrared (IR). Anei ngā taipitopito mō ia tikanga:
te ine i te waikawa-pūtake
Ko te tikanga e hangai ana ki te tauhohenga whakakore i waenga i ngā rōpū waikawa me ngā rōpū taketake i roto i te HPMC. Tuatahi, ka whakarewaina te HPMC ki roto i te whakarewa, ā, ka tāpirihia he rōrahi e mōhiotia ana o te otinga waikawa, turanga rānei, he nui te kukū e mōhiotia ana. I whakahaerehia te titration kia tae rā anō te pH ki te pūwāhi kūpapa. Mai i te nui o te waikawa, te turanga rānei i pau, ka taea te tatau i te taumata o te whakakapinga.
Tātaritanga huānga
Ka ine te tātari huānga i te ōrau o ia huānga kei roto i tētahi tauira, tae atu ki te waro, te hauwai, me te hāora. Ka taea te tatau i te nui o te whakakapinga mai i te nui o ia huānga kei roto i te tauira HPMC.
Te Whakamātautau Wai Mahi Teitei (HPLC)
He tikanga tātari whānui te HPLC e wehewehe ana i ngā wāhanga o te ranunga i runga i tā rātou taunekeneke ki ngā wāhanga tūmau me ngā wāhanga nekeneke. I roto i te HPMC, ka taea te tatau i te taumata o te whakakapinga mā te ine i te ōwehenga o te hydroxypropyl ki ngā rōpū methyl i roto i te tauira.
Te Matawai Pūwero (IR)
He tikanga tātari te ine i te mimiti, te tuku rānei o te hihi whero e tētahi tauira. He rerekē ngā tihi mimiti o te HPMC mō te hydroxyl, te methyl me te hydroxypropyl, ka taea te whakamahi hei whakatau i te taumata o te whakakapinga.
He mea nui te parakore o te HPMC i roto i ngā ahumahi rongoā me te kai, ā, he mea nui tōna whakatau kia mau ai te haumaru me te whai huatanga o te hua whakamutunga. He maha ngā tikanga e wātea ana hei whakatau i te parakore o te HPMC, tae atu ki te titration waikawa-pūtake, te tātari huānga, te HPLC, me te IR. He painga me he ngoikoretanga o ia tikanga, ā, ka taea te whiriwhiri i runga i ngā whakaritenga motuhake o te tono. Hei pupuri i te parakore o te HPMC, me rongoa ki te wāhi maroke, hauhautanga, kia matara atu i te rā me ētahi atu poke.
Wā tuku: 25 o Ākuhata-2023