Ngā Whakamahinga o ngā Ine Papatipu i roto i te Matū
Ko te ine ira papatipu tētahi o ngā taputapu tātari tino nui i roto i te matū hou. Mā tēnei taputapu ka taea e ngā kaipūtaiao te "kite" i te hanganga o tētahi tauira i runga i ngā papatipu o ōna matūriki, inā koa ngā papatipu o ngā katote. Nā te kaha ki te tautuhi i ngā matū, te whakatau i ngā hanganga ngota, te ine i te kukū o ngā matū, tae atu ki te kite i ngā poke i roto i ngā rahinga iti rawa, kua noho ngā ine ira papatipu hei poutokomanawa mō ngā momo mara matū: te matū waro , te matū kore-waro, te matū koiora, te matū taiao, te rongoā, tae noa ki te rangahau taihara. Ka matapakihia e tēnei tuhinga ngā mātāpono mahi me ngā whakamahinga matua o ngā ine ira papatipu i roto i te matū me te take he tino whai hua tēnei tikanga.
Ngā Mātāpono Taketake o te Ine Papatipu
Ko te mahi a te ine papatipu mā te huri i ngā ngota hei katote, kātahi ka wehewehe i ngā katote i runga i te ōwehenga papatipu-ki-te-utu (m/z). Ko te tikanga, e toru ngā wāhanga matua o te ine papatipu: he pūtake katote, he tātari papatipu, me te pūoko.
1. Whakakorikori: Ka whakakahangia te tauira hei hanga i ngā katote. He maha ngā tikanga whakakorikori, tae atu ki te Whakakorikori Hiko (EI), te Whakakorikori Rehu Hiko (ESI), me te Whakakore/Whakakorikori Taiaho Āwhina-Matrix (MALDI).
2. Te wehenga i runga i te m/z: Ka tukuna ngā katote mā roto i tētahi tātari papatipu pērā i te quadrupole, te time-of-flight (TOF), te mahanga katote, te Orbitrap rānei kia wehea ai i runga i tō rātou uara m/z.
3. Te Kitenga: Ka tatau te kite i te kaha o te katote i ia uara m/z, ā, ka puta he whānuitanga papatipu i te āhua o ngā tihi e tohu ana i ētahi katote.
Ka taea te whakaaro ki te whānuitanga papatipu he "tapumati" matū: he motuhake tōna tauira tihi, inā koa ka honoa ki ngā mōhiohio wehewehe me ngā tikanga wehewehe pēnei i te chromatography.
1. Te Tāutu i ngā Matū me te Whakatau i te Papatipu Ngota
Ko te whakamahinga taketake o te ine papatipu ko te whakatau i te papatipu ngota me te tautuhi i ngā pūhui. I roto i te tātaritanga o ngā pūhui waro , ko ngā tihi e tohu ana i ngā katote ngota, i ngā tāpiringa rānei (hei tauira, [M+H]^+ i roto i te ESI) ka whakarato i ngā mōhiohio tika mō te papatipu ngota.
I roto i te mahi, ka mahia te tautuhi mā te:
– Te whakataurite i ngā irahiko ki ngā whare pukapuka irahiko papatipu, inā koa mō ngā tikanga EI i runga i ngā matū pūngāwerewere.
– Te whakatau papatipu tika (MS taumira teitei) hei whakatau tata i ngā tātai ngota i runga i ngā uara papatipu tino tika.
– Ngā tauira isotope (hei tauira, he āhua motuhake ngā tauira isotope o Cl me Br) hei āwhina i te whakatau i te hanganga o ngā huānga.
He mea tino nui tēnei pūkenga ina hangaia e ngā kairangahau ngā matū hou: i mua i te haere tonu ki ngā tātaritanga anō, ka taea e rātou te whakaū kei te tika te taumaha o te hua ka puta.
2. Te Whakamārama Hanganga mā te Wehewehenga (MS/MS)
Haunga te ine i te papatipu, ka taea te whakamahi i ngā ine papatipu hei ako i te hanganga ngota mā te wehewehe. I ētahi tikanga, ka taea e ngā katote ngota te pakaru ki ngā kongakonga iti ake. Ka whakaratohia e ēnei tauira kongakonga he tohu mō ngā rōpū mahi , ngā angaanga waro, me te hononga o ngā ngota.
He tino rongonui ngā tikanga ine papatipu tandem (MS/MS) nā te mea ka taea te whiriwhiri i ngā iona motuhake (ngā iona mua) kātahi ka whakahaere i te wehewehenga hei whakaputa i ngā iona wāhanga (ngā iona hua). Mai i tēnei, ka taea e ngā kaimātai matū te:
– Te tautuhi i te tūranga o ētahi rōpū i roto i tētahi ngota ngota.
– Te wehewehe i waenga i ngā isomers he rite te papatipu ngota engari he rerekē ngā hanganga.
– Tātarihia ngā ngota matatini pēnei i ngā peptide, ngā metabolites, ngā pūhui taiao rānei.
I roto i te matū waro me te matū koiora, ka honoa te MS/MS me ngā rauropi rapu hei whakamārama i ngā kongakonga, kia tere ake ai, kia pūnaha ake ai hoki te tukanga whakatau hanganga.
3. Te Tātari i ngā Ranunga Matatini me te GC-MS me te LC-MS
He maha ngā tauira matū tūturu ehara i te mea he pūhui parakore, engari he ranunga matatini. Ko te painga o te ine ira papatipu he taea te whakakotahi me ngā tikanga wehewehe pēnei i:
– GC-MS (Gas Chromatography–Mass Spectrometry) mō ngā matū pūngāwerewere me ngā matū pumau, pērā i ngā whakarewa, ngā hauwaiwaro, ētahi patupatu pepeke, ngā wāhanga kakara rānei.
– LC-MS (Liquid Chromatography–Mass Spectrometry) mō ngā matū kore-pohehe, ngā matū wera rānei, pērā i ngā rongoā, ngā matū whakaputa matū, ngā tae, me ngā ngota koiora.
Mā te chromatography ka wehea ngā wāhanga o te ranunga i runga i te roa o te pupuri, ko te MS ia e tautuhi i ia wāhanga i runga i tōna whānuitanga papatipu. He kaha tēnei huinga nā te mea:
– Ka whakaiti i te taupatupatu tohu i waenga i ngā matū.
– Ka āhei te tātari kounga me te tātari tauanga i roto i te raupapa kotahi.
– He nui ake te aro me te whiriwhiri i ngā tikanga takitahi.
I roto i te matū tātari , ko te GC-MS me te LC-MS ngā paerewa mō ngā whakamātautau o ia rā me ngā whakamātautau rangahau.
4. Te Ine: Te Ine Tika i te Ihirangi o ngā Matū
Ehara i te mea ko te ine i te nui o te matū e whakamahia ana hei "tautuhi" i ngā matū anake, engari hei ine anō hoki i tō rātou kukū me te tino aro. I roto i te nuinga o ngā wā, ka taea e te MS te kite i ngā matū i ngā taumata iti, pērā i te nanograms ia rita, iti iho rānei, inā koa ka whakamahia ngā aratau aroturuki whiriwhiri.
Ko te ine ine me te MS ka whakamahia pinepine:
– Ngā paerewa ā-roto (he maha ngā wā kua tohua he isotope) hei whakatika i ngā rerekētanga werohanga me ngā pānga matrix.
– Te kōpiko whakatikatika hei hono i te kaha o te tohu ki te kukū.
– Ngā aratau kimi ahunga pēnei i te SIM/MRM (i runga i te quadrupole, i te triple quadrupole rānei) hei whakanui ake i te whiriwhiringa.
He mea tino nui ēnei painga i roto i te rongoā, te paitini, me te tātari taiao, e hiahiatia ana he iti ngā rohe kitenga me te tino tika.
5. Ngā Whakamahinga i roto i te Matū Rongoā me te Kitea o te Rongoā
I roto i te whanaketanga o ngā rongoā, ka whakamahia ngā ine papatipu mai i ngā wāhanga tīmatanga tae noa ki te whakahaere kounga. Hei tauira:
– Te tautuhi me te whakaahua i ngā rongoā e hiahiatia ana: te whakarite i te hanganga me te parakore.
– Ngā rangahau pākia o te tinana: te kimi i ngā matūkai rongoā i roto i te toto, i te mimi rānei, te aromatawai i ngā ara whakawhiti koiora.
– Whakamātautau pumau: te aroturuki i ngā hua pirau nā te mārama, te wera, te pH rānei.
– Te whakatau i ngā poke: te kimi i ngā poke i ngā taumata tino iti ka pā ki te haumaru.
He taputapu pono rawa te LC-MS/MS nā te mea ka taea e ia te tātari i ngā matū rongoā he maha ngā wā he pōraruraru, he uaua hoki, ā, he pai hoki te mahi i roto i ngā whāriki koiora.
6. Matū Taiao: Te Kitenga i ngā Parahanga me ngā Mea Parahanga
Ko te mara o te matū taiao e hiahia ana ki ngā tikanga e taea ai te kite i ngā poke i ngā taumata tino iti. Ka whakamahia ngā inenga papatipu ki:
– Te ine i ngā patupatu pepeke, ngā patu taru, me ā rātou hua pirau i roto i te wai me te oneone.
– Te kimi i ngā konganuku taumaha me te whakarōpūtanga huānga (mā ngā tikanga motuhake pēnei i te ICP-MS mō ngā huānga).
– Te tātari i ngā matū waro pumau pērā i ngā PCB, ngā taiokini, ngā PAH rānei.
– Te aro turuki i ngā poke e puta ake ana pērā i ngā toenga rongoā, ngā poke moroiti, me ngā matū perfluoroalkyl.
Mā te raraunga tika, ka taea e ngā kairangahau te aromatawai i ngā pūtake parahanga, te tohatoha, me ngā mōrearea ki te hauora me ngā rauropi.
7. Matū koiora me te Pūmua: Te Tātari i ngā Ira Koiora Nui
Mā ngā tikanga whakakoi ngāwari pērā i te ESI me te MALDI ka huaki te kuaha ki te tātari i ngā ngota nui pērā i te pūmua, te peptides, me te oligonucleotides. I roto i te matū koiora, ka whakamahia te ine papatipu hei:
– Te Pūmua: te tautuhi i ngā pūmua i roto i ngā ranunga matatini, te mahere i ngā whakarerekētanga i muri i te whakamāoritanga (hei tauira, te whakapūtātanga).
– Te Pūtaiao Tauhohenga: te mahere i ngā kōtaha matū koiora hei mārama ki ngā āhuatanga ā-tinana, ki ngā mate rānei.
– Te whakatau i te papatipu me te rerekētanga o ngā koiora ngota (hei tauira, te glycosylation).
E whakaatu ana tēnei mahi kāore te whai huatanga o ngā ine papatipu i te mea ko te matū "parakore" anake, engari kua noho hei taputapu matua i roto i ngā pūtaiao koiora ngota.
8. Te Matū Tūpāpaku me te Haumaru Kai
E whakamahia whānuitia ana ngā ine papatipu i roto i ngā mahi tātaritanga tūpāpaku mō:
– Te kimi i ngā raau taero, ngā matū hinengaro hou, me ō rātou matū whakaputa.
– Te tātari i te paitini, te waipiro, ngā mea pahū rānei.
– Te manatoko i te pono o te tauira me te whai i ngā pūtake matū.
I roto i te haumaru kai, ka āwhina a MS ki te whakamātautau:
– Ngā toenga patu pepeke i runga i ngā hua me ngā huawhenua.
– Ngā poke pēnei i te melamine, ngā paitini kino, ngā matū turekore rānei.
– Te pono o te hua (hei tauira, ngā kōtaha motuhake hei wehewehe i te tinihanga).
Ko ōna painga ko te tino whiriwhiri, ngā āheinga whakaū, me te aro nui e tutuki ana i ngā paerewa ture.
Whakamutunga
He whānuitia ngā whakamahinga o ngā ine papatipu i roto i te matū: mai i te tautuhi matū, te whakatau papatipu ngota, te whakamārama hanganga mā te wehewehe, te tātari ranunga me te GC-MS/LC-MS, te ine i ngā taumata matū, tae atu ki ngā tono motuhake i roto i ngā rongoā, te taiao, te matū koiora, te tātari ture, me te haumaru kai. Ko te whakakotahitanga o te tairongo teitei, te whiriwhiri, me te ngāwari i roto i ngā tikanga ionization me te tātari papatipu ka waiho tēnei taputapu hei "taputapu maha-kaupapa" mō ngā kaimātai matū.
Ki te hiahiatia, ka taea te whakawhanake ake i tēnei tuhinga me ngā upoko iti motuhake mō ngā momo ionization (EI, ESI, MALDI), ngā momo tātari papatipu (quadrupole, TOF, Orbitrap), me ngā tauira o te ao tūturu mai i ia mara tono.
