ICP-MS

Pesticide Analysis by GC-ICP-MS
Single ion chromatograms for C, P and S
(right) and Cl, Br and I (below), extracted
from multi-element GC-ICP-MS acquisition
Low backgrounds (due to absence of
solvent) and good ionization (due to high
temperature of “dry” dry plasma) plasma), leads to
excellent signal to background and low LOD
400000
300000
200000
100000
0
400000
300000
200000
100000
0
400000
300000
Chl Chlorine i
Ion 35.00 (34.70 to 35.70): CICCAL3.D
8000000
6000000
4000000
2000000
300 3.00 400 4.00 500 5.00 600 6.00 700 7.00 800 8.00 900 9.00 10 10.00 00 11 11.00 00 12 12.00 00 13 13.00 00
Bromine
Ion 79.00 (78.70 to 79.70): CICCAL3.D
3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00
Iodine
Ion 127.00 (126.70 to 127.70): CICCAL3.D
Carbon
IIon 12.00 12 00 (11 (11.70 70 tto 12 12.70): 70) CICCAL3 CICCAL3.DD
0
3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00
Ion 31.00 (30.70 to 31.70): CICCAL3.D
Phosphorus
400000
300000
200000
100000
0
3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00
Ion 34.00 (33.70 to 34.70): CICCAL3.D
100000
80000
60000
40000
20000
Sulphur
0
3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00
Compound p Conc (pg/uL (pg - ppb) pp ) Calib Elements Elemental %
Dichlobenil 610 Cl 41.3
2,4,6-TBA 287 Br 72.5
Ethoprop 39 P, S 12.8, 26.4
DBOB 100 Br 35 35.1 1
Phorate 210 P, S 11.9, 36.9
PCNB 169 Cl 60.1
Terbufos 745 P, S 10.8, 33.3
200000 Diazinon 976 PP, S 10 10.2, 2 10 10.5 5
100000
Malathion 107 P, S 9.37, 19.4
0
3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00
Dursban 569 Cl, P, S 30.3, 8.82, 9.15
Table (right) shows components, concentrations and
elemental l t l weight i ht % in i 1/10 diluted dil t d CIC pesticide ti id mix.
i
Page 25
Ioxynil (methyl ester) 50 I 66
TPP 158 P 50 50.3 3
ESAC April 2008