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Neil Cullum1 and Paul Stephens and Stan Evans2
1Anglian Water Labtories, Huntingdon UK2Agilent Technologies, Ltd. Bracknell, UK
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� 1. SIM Parameters
SIM ionsGroup Quantitation, Fragmentor
Compound Time number Qualification (q) voltage3,6-�� ! -2- �� 1.00 1 178.9, 180.9 q 90Clopyralid 190.1, 192.0 q 75�� 238.9, 240.9 q 120�� 260.1, 261.1 q 75
�� 12.0 2 174.9, 177.0 q 85
Benazolin 17.0 3 169.9, 171.9 q 140�� 195.0, 196.9 q 145�� !�� 239.0, 240.1 q 140�� !�� 259.0, 261.0 q 135
MCPA 24.5 4 199.0, 201.0 q 1502-�� -4- � 219.0, 220.9 q 150�� 275.9, 278.0 q 140
Dichloroprop 28.0 5 160.9, 162.9 q 1502,4-�� 195.0, 196.9 q 150�� 195.9, 198.0 q 1502-�� -4-�� 213.0, 215.0 q 150Ioxynil 369.9. 371.0 q 145
2-�� -4- � 33.5 6 160.9, 163.0 q 150MCPB 227.1, 229.1 q 70
Propyzamide 36.25 7 254.1, 256.0 q 120
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Peak
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2
3
4
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Sign
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174.
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177.
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min5 10 15 20 25 30 35
0
50000
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34
56 7
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10
1112
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15, 16
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1 Clopyralid2 Picloram3 Imazapyr4 2,3,6-TBA5 Dicamba6 Benazolin7 Fluroxypyr8 Bromacil9 Bentazone10 Bromoxynil
11 2,4-D12 MCPA13 Triclopyr14 Ioxynil15 Dichloroprop16 2,4,5-T17 Mecoprop18 2,4-DB19 MCPB20 Propyzamide
min5 10 15 20 25 30 35 40 45
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SIM ion: 239.0 m/z
m /z180 200 220 240
239
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Area
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Correlation: 0.99999
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Groundwater samples Potable water samplesCompound Recovery % RSD % Recovery % RSD % LOD µµµµµg/LClopyralid 89.4 10.1 61.1 12.9 0.00658Picloram 67.1 9.4 67.7 9.3 0.00477Imazapyr 73.1 11.0 47.5 13.6 0.006312,3,6-TBA 93.4 6.4 83.5 9.0 0.00335Dicamba 92.6 6.5 83.0 7.5 0.00882Benazolin 83.7 7.4 67.6 7.5 0.00629Fluroxypyr 84.8 7.6 72.7 7.6 0.00694Bromacil 89.2 7.9 61.6 9.2 0.00702Bentazone 106.8 4.1 98.6 4.9 0.01034Bromoxynil 99.5 4.2 94.0 5.1 0.006662,4-D 85.1 8.8 76.7 6.1 0.00603MCPA 91.5 8.1 83.2 4.9 0.00526Triclopyr 97.7 7.4 85.0 6.8 0.00704Ioxynil 100.2 6.3 99.8 4.5 0.00653Dichloroprop 95.8 6.1 89.8 4.4 0.005452,4,5-T 86.7 7.3 83.0 5.7 0.00562Mecoprop 96.6 5.9 93.9 4.6 0.005932,4-DB 90.7 6.3 81.6 5.7 0.00488MCPB 93.2 5.8 84.2 7.9 0.00647Propyzamide 86.8 5.9 87.5 5.3 0.00574Average 90.2 7.1 80.1 7.1 0.00630
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