GC-MS hei whakamatautau i te toenga pesticide me te DEHP, DBP LC-MS hei whakamatautau i te Whero a Sudan GC hei whakamatautau i te toenga whakarewa ICP-MS hei whakamatautau i te Taumaha whakarewa Pb Hg Cd Cr Ni Ihirangi whakamatautau HPLC