Analysis of Pesticides in Surface Water and Sediment from Yolo Bypass, California, 2004–2005
By
Kelly L. Smalling, James L. Orlando, and Kathryn M. Kuivila
Table 3
Mean recovery of pesticides from matrix spikes (n = 9) using various bed (n = 5) and suspended (n = 4) sediment and method detection limits (MDL).
[All
MDLs were determined in Cache Creek sediment only (n = 7).
µg/kg
, microgram per kilogram;
SD, standard deviation;
MDL, method detection limit;
NA
, not available]
| |
Mean ± SD (%) |
MDL (ng/g) |
| Triazines/Triazones |
|
|
| Atrazine¹ |
85.0 ± 5.1 |
1.7 |
| Hexazinone |
114 ± 12.7 |
2.3 |
| Prometryn¹ |
89.3 ± 9.0 |
1.9 |
| Simazine¹ |
91.3 ± 7.8 |
1.4 |
| |
|
|
| Anilines |
|
|
| Ethalfluralin¹ |
82.8 ± 8.9 |
1.2 |
| Pendamethalin |
105 ± 5.1 |
1.5 |
| Trifluralin |
88.9 ± 13.6 |
1.1 |
| |
|
|
| Chloacetanilides |
|
|
| Alachlor¹ |
86.1 ± 10.9 |
1.4 |
| Metolachlor¹ |
85.1 ± 5.6 |
1.7 |
| |
|
|
| Carbamates |
|
|
| Carbaryl |
103 ± 8.0 |
2.2 |
| Carbofuran¹ |
102 ± 13.0 |
5.3 |
| |
|
|
| Thiocarbamates |
|
|
| Butylate¹ |
60.0 ± 6.6 |
1.1 |
| Cycloate¹ |
66.6 ± 5.5 |
0.8 |
| EPTC¹ |
62.3 ± 8.1 |
1.4 |
| Molinate |
62.9 ± 7.7 |
0.6 |
| Pebulate¹ |
60.6 ± 6.9 |
0.9 |
| Thiobencarb |
93.9 ± 10.7 |
1.6 |
| |
|
|
| Organochlorines |
|
|
|
p,p'-DDD |
85.4 ± 12.7 |
1.3 |
|
p,p′-DDE |
85.1 ± 9.1 |
1.5 |
|
p,p′-DDT |
85.2 ± 12.4 |
1.9 |
| |
|
|
| Organophosphates |
|
|
| Chlorpyrifos |
82.5 ± 6.0 |
0.8 |
| Diazinon¹ |
85.1 ± 14.8 |
0.6 |
| Malathion¹ |
94.4 ± 7.8 |
2.2 |
| Methidathion¹ |
102 ± 10.5 |
1.5 |
| Methylparathion¹ |
103 ± 7.4 |
2 |
| Phosmet¹ |
93.8 ± 17.0 |
2.4 |
| |
|
|
| Pyrethroids |
|
|
| Bifenthrin |
84.2 ± 15.1 |
2.3 |
| Cyfluthrin¹ |
81.5 ± 7.3 |
7.9 |
| Cypermethrin¹ |
86.0 ± 14.1 |
5.6 |
| Deltamethrin¹ |
88.5 ± 15.1 |
1.1 |
| Esfevalerate¹ |
80.1 ± 6.6 |
1.8 |
| Fenpropathrin¹ |
85.3 ± 17.9 |
1.4 |
| Lambda-Cyhalothrin¹ |
77.1 ± 9.8 |
1.6 |
| Permethrin¹ |
79.0 ± 12.8 |
1.2 |
| Sumithrin¹ |
92.8 ± 16.3 |
2.9 |
| Tau-fluvalinate |
83.5 ± 14.9 |
1.1 |
| |
|
|
| Miscellaneous |
|
|
| DCPA |
82.4 ± 8.4 |
1.5 |
| Napropamide |
98.2 ± 8.5 |
1.6 |
| Oxuflurofen |
92.7 ± 10.5 |
2.5 |
| Piperonyl butoxide¹ |
106 ± 10.0 |
1.3 |