Ko te Tangohanga Wāhanga Mārō (SPE) he tauira hangarau i mua i te maimoatanga i whakawhanakehia mai i te waenganui o te 1980s. Ka whakawhanakehia e te whakakotahitanga o te tangohanga wai-totoka me te chromatography wai. Ka whakamahia te nuinga mo te wehenga, te purenga me te whakarangatira i nga tauira. Ko te kaupapa matua ko te whakaiti i te wawaotanga matrix tauira me te whakapai ake i te arokitenga.

I runga i te ariā o te chromatography wai-totoka, ka whakamahia e te hangarau SPE te whakaurunga whiriwhiringa me te elution whiriwhiri hei whakarangatira, wehe me te pure i nga tauira. He tukanga tango tinana tae atu ki nga wahanga wai me te totoka; ka taea hoki te whakatau tata ma te kii he mahinga chromatographic ngawari.
Hoahoa hoahoa o te taputapu tangohanga wahanga totoka
Ko te SPE te maataapono wehewehe o te chromatography wai ma te whakamahi i te whakaurunga whiriwhiri me te elution whiriwhiri. Ko te tikanga e whakamahia nuitia ana ko te tuku i te wairewa tauira wai i roto i te adsorbent, te pupuri i te matū kia whakamatauria, katahi ka whakamahi i te whakarewa o te kaha e tika ana hei whakakore i nga poke, katahi ka tere te whakakore i te matū hei whakamatautau me te iti o te whakarewa, kia rite ki te whakatutuki i te kaupapa o te wehenga tere, purenga me te kukū. Ka taea hoki te whakakopa i nga poke pokanoa me te tuku i te matū kua ine kia rere ki waho; ki te whakauru i nga poke me te matū ine i te wa kotahi, ka whakamahi i te whakarewa pai hei whakaemi i te matū ine.
He totoka te tangohanga o te tikanga tangohanga toka-waa, a ko tana kaupapa mahi i runga i te meka ko nga waahanga hei ine me nga waahanga pokanoa e noho tahi ana i roto i te tauira wai he rereke nga mana ki te kaihoko tangohanga totoka, kia kua wehea tetahi ki tetahi. Ko te kaihoko tangohanga wahanga totoka he whakakii motuhake kei roto C18, C8 ranei, nitrile, amino me etahi atu roopu.