This is a gas chromatographic (GC) method applicable to the determination of triazine pesticides in industrial and municipal discharges as provided under 40 CFR 136.1. Approximately 1 L of sample is extracted with 15% methylene chloride using a separatory funnel. The extract is dried and exchanged to hexane during concentration to a volume of 10 mL or less and the extract is analyzed by gas chromatography with a thermionic bead detector in the nitrogen mode. Any positive hits are confirmed on a second column or by GC/MS. An optional Florisil column cleanup procedure to aid in the elimination or reduction of interferences from the sample matrix.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | All samples must be extracted within seven days of collection and completely analyzed within 40 days of extraction. |
| Preservatives: | All samples must be iced or refrigerated at 4°C from the time of collection until extraction. |
| Required Preps: | Glass bottle |
| Collection Method: | Grab or composite sampling |
| Analytical Methodology: | GC/thermioc bead detector in nitrogen mode |
| Documentation: | 
619
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Simetryn | C8H15N5S |
1014-70-6 |
0.5 |
µg/L |
| Simazine | C7H12ClN5 |
122-34-9 |
0.5 |
µg/L |
| Propazine | C9H16ClN5 |
139-40-2 |
0.5 |
µg/L |
| Atraton | C9H17N5O |
1610-17-9 |
0.5 |
µg/L |
| Prometon | C10H19N5O |
1610-18-0 |
0.5 |
µg/L |
| Atrazine | C8H14ClN5 |
1912-24-9 |
0.5 |
µg/L |
| Secbumeton | C10H19N5O |
26259-45-0 |
0.5 |
µg/L |
| Terbutylazine | C9H16ClN5 |
5915-41-3 |
0.5 |
µg/L |
| Prometryn | C10H19N5S |
7287-19-6 |
0.5 |
µg/L |
| Ametryne | C9H17N5S |
834-12-8 |
0.5 |
µg/L |
| Azinphos-methyl (Guthion) | C10H12N3O3PS2 |
86-50-0 |
0.5 |
µg/L |
* The analytes and detection limits listed for each method represent the typical detection limits and analytes reported for that particular method. Keep in mind that analyte lists may vary from laboratory to laboratory. Detection limits may also vary from lab to lab and are dependent upon the sample size, matrix, and any interferences that may be present in the sample.