Ngā āhuatanga matua o te mahi me te hanganga:
Ko ngā wāhanga matua o te tangohanga ko te CH₂Cl₂, te hinu mā, me te wai iti. Mā te whakamahi i ngā pūmahana kohua rerekē o ngā matū e toru, ka mahia te tangohanga mā roto i tētahi raupapa o ngā mahi, pērā i te whakahoro tuatahi, te whakahoro hau, te tango hau korehau, te CH₂Cl₂ me te tātari i te hinu mā. I wehea te otinga tangohanga, ā, i purea kia whakahokia mai te CH₂Cl₂ (para > 99.97%) me te hinu mā (para > 99.97%) kia tutuki ai ngā whakaritenga o te whakamahinga anō i roto i te raina whakaputa, me te whakaiti i te whakamahinga rauemi o te pūnaha whakaputa. Whakaitihia te utu whakaputa o te kiriata wehewehe.