- Trong 144 mku khdng khi cd 55,5% sd mau chUa tdn lUdng HCTS qua TCCP (tii 2 den 10 lan)
148. UNEP, IRPTC data profiles on Malathion, QR 4383, Geneva,
PHU LUC
Xac dinh HCTS trong dat bang GC/ECD, GC/NPD, GC/MSD
N a m m a u dat da chiet tach, lam sach tai Nha Trang d\i6c
GS.Nguyen Due Hue diia sang Cong hoa Lien bang Diic de kiem tra bang phudng p h a p GC/ECD, GC/WPD, GC/MSD (tai phong thi nghiem doc hoc va moi tnio'ng ciia trU5ng Dai hoc Tong hdp Bremen - (X>ng hoa Lien bang Diic).
1. Dieu kien chay sac ky khi :
a) Cac chat trii sau cd-clo dildc phan tich tren may sac ki Perkinelmer
8420 v6i detectd cong ket dien tii ""^Ni-ECD va cot mao dan shie chiu nhiet SE 54.
* Diiong kinh trong cua cot la 0,32 mm. * Chieu dai cot la 25m.
* Do day m a n g t a m 0,5 j't.m
* Khi m a n g He v6i ap suat 76 Kpa
* Khi ho trd la Ar/CH4 (95 : 5, theo the tich ), toe do dong 40 ml/phiit * Nhiet do buong bdm mau 255 *^C
* Nhiet do eiia detectd 300 ^C ChUdng t r i n h nhiet do
* Nliiet do cot mot : 100 ^C, thoi gian giii khong doi la 1 phiit . Toe do tang nhiet do la 10 ^C/phut
* Nhiet do cot hai : 210 *^C, thdi gian giii khong doi 0 phiit, toe do tang nhiet do la 3 ^C/phiit
* Nhiet do cot ba : 230^C, thdi gian giii khong doi la 36 phiit
b) Cac hoa chat trif sau cd-photpho diidc phan tich tren may Ferkin- elmer 8.500 v6i detectd Ru-NPD va cot mao quan silic chiu nhiet C P l S s i l 1 3 C B .
* Ditdng kinh trong ciia cot 0,25 m m * Chieu dai cot 25m
''^- Do day m a n g t a m 0,2/^ m
^= Khi m a n g He vcii ap suat 100 KPA
* Khi dot H2 vdi toe do 2 m l / p h u t , khong khi 100 ml/phiit * Nhiet do buong bdm m a u 260 ^C
* iNmei ao COL mui ; /u-^. Thdi gian giCt khong doi : 1 phiit. Toe do tang nhiet do lO^C/phiit
* Nhiet do cot hai : 250°C. Thdi gian gitr khong doi : 20 phiit. Toe do tang nhiet do 0°C/phut.
2. De kh^ng dinh cac thuoc trit sau cd-clo va cd-photpho trong mot so mku,
dUdc tien hanh nhd su dung Varian 3300/3400 GC-Fiimuigan MATIT 540 detetd khoi pho chon loc vdi cot mao quan silic chiu nhiet Ultra 1.
Ditdng kinh trong 0,2 mm Chieu dai cot 25 m
Do day mang tam 0,33 j^an Khi mang H2 vdi ap suat lO.Psi Nhiet do buong bdm mau 260°C Nhiet do nguon ion 225^C
ChUdng t r i n h nhiet do
* Nhiet do cot mot : 70°C. Thdi gian giii khong doi : 1 phiit, toe do tang nhiet do : 15°C/phut.
* Nhiet do cot hai : 160°C. Thdi gian giii khong doi : 6 phut, toe do tang nhiet do 6°C/phut.
* Nhiet do cot ba : 260oC. Thdi gian giii khong d o i : 12 phut.
3. Cac ton ludng HCTS ditdc xac dinh dUa vao viec quan sat cae ion
chon loc CO m/z : 217 cho HCH, 235 cho DDT, 263, 109, 125 cho
metylparathion.
Gidi h a n xac dinh dox vdi HCH va cac dong phan, DDT va cac dong phan la 0,001 - 0,005 mg/kg va vdi cd-photpho la 0,01 mg/kg.
- Do t h u hoi 95 - 102% Ket qua nhit bang 44
Bang 44. Ton litdng HCTS trong dat (mg/kg)
(GC/ ECD, GC/NPD va GC/MSD tai tntdng Dai hoc tong hdp Bremen, Cong hoa Lien bang Diic)
Mau dat D l