This method is for the collection and analysis of airborne nitrogen dioxide. The sample is collected on a triethanolamine (TEA)-impregnated molecular sieve tube. The tube converts nitrogen dioxide to nitrite in After collection the tube is desorbed with a 1.5% triethanolamine solution and analyzed by for (NO2-) by ion chromatography.
Note: This method supersedes Method ID-109.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | The method states the samples can be stored at least 29 days if kept at ambient (20-25°C). |
| Preservatives: | Store samples at (20-25°C). |
| Required Preps: | TEA-IMS tube, (SKC 226-40-02) |
| Collection Method: | The method recommends a flow rate of 0.20 L/min. and a collection volume of 3.0 L. |
| Analytical Methodology: | IC |
| Documentation: | 
ID-182
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Nitrogen dioxide | NO2 |
10102-44-0 |
0.19 |
ppm |
* 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.