This method is for the determination of 2,4-toluenediamine & 2,6-toluenediamine. The sample is collected in an impinger containing a 15 mL solution of 1-(2-methoxyphenyl)-piperazine in toluene. The sample is then acetylated for 4 hours, evaporated, and then redissolved in 1.5mL methanol. The sample is then analyzed by HPLC with ultraviolet detection. The working range is 3 to 30 µg/m³ for a 100-L air sample. This method, based on that of Warwick et al. for isocyanates, determines 2,4- and 2,6-toluenediamine in air in the presence of isocyanates. Samples from polyurethane foam plants were analyzed simultaneously for 2,4- and 2,6-toluenediamine and 2,4- and 2,6-toluene diisocyanate.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | At least two weeks. |
| Preservatives: | Store at room temperature in the dark. |
| Required Preps: | Impinger containing a 15 mL solution of 1-(2-methoxyphenyl)-piperazine in toluene. |
| Collection Method: | Impinger: 30L - 500L @1L/min. |
| Analytical Methodology: | HPLC/UV |
| Documentation: | 
5516
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| 2,6-Toluenediamine | 823-40-5 |
0.1 |
µg | |
| 2,4-Toluenediamine | C7H10N2 |
95-80-7 |
0.1 |
µg |
* 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.