ptkt

4. Kt lunC18 xp cha silica c nh gi c kh nng ly ra mt lng ha cht thuc tr su ln t b mt v nc ngm. Dung mi thch hp cho mi giai on sn xut c la chn bng cch c lp vi nng thp 1 nhm thuc tr su. thu hi t 52 ti 102%. thu hi c cha triazines s dng C18 extraction cartridges and conventional LLE c so snh. V C cartridges c tm thy nhiu hn khi chn la phn tch triazines hn cng ngh LLE. Gioi hn ca u d cho 70 hp cht clo hu c th cao hn 0.03 microg/l v LOD cho 15 cht phn tch khc th hn 0.06 microg/l.3.3 Kim nh nghin cu thuc tr su Lassithis Plateau, Crete, Greece.Mc ch ca n phn tch c s dng cho vic phn tch nhng mu nc ly t nhng cnh ng Plateau of Lassithi, Crete. o Crete, min ng nam Mediterranean, l 1 trong nhng o ln nht Greece vi dn s hn 500 000 ngi v 1 khu vc rng 8 500 000 km2. Mt lot cc p lc t mi trng tc ng ln hn o: tc ng ln nn nng nghip khng bn vng (khoai ty, ng cc v rau canh tc), s pht trin nhanh ca cc ngnh du lch, dch v , c bit l cc khu vc ven bin, cho kt qu ng k trong vic gia tng nhu cu nc. Mt p, c xy dng trn khu vc sng Aposelemis, th ang tp trung nc ca vng Lassithis Plateau, ci m, sau khi ch ha, s c s dng cho vic cung cp nc cho thnh ph Heraklion and Agios Nikolaos, m gii quyt nhu cu ca thnh ph ny.Table 330 mu nc b mt v nc ngm vng Plateau of Lassithi th c ly mi thng t thng 11 nm 1995 ti thng 6 nm 1996 t Aposelemis, Havgas and Honos sng v the Pinakiano v Malia . Mc ca thuc tr su c tm thy trong nc trnh by trong Table 3. D lng thuc tr su tm thy c nm trong 1 phm vi rng ln t 0.001 microg/l ti 0.091microg /l cho thuc tr su c cha clo hu c. T 0.010microg /l ti 0.046microg /l cho triazines, v t 0.009microg /l ti 0.300microg /l cho thuc tr su c cha axit. Thuc tr su Carbamates th khng c tm thy trong nhiu mu. Vic nhn bit clo hu c trong thuc tr su th da trn thi gian lu bng vic s dng 2