This method is for the determination of aminoethanol compounds: monoethanolamine (MEA), diethanolamine (DEA), and triethanolamine (TEA). The sample is collected using an impinger containing 15mL of 2mM hexanesulfonic acid. After sample collection and aliquot of the impinger is and analyzed by ion chromatography (IC). The method is better suited to area sampling than personal sampling because it uses an impinger for sample collection.
The working ranges for MEA, DEA, and TEA are 0.08 to 12 ppm (0.2 to 30 mg/m³), 0.09 to 7 ppm (0.4 to 30mg/m³) and 0.1 to 5 ppm (0.6 to 30 mg/m³), respectively, for a 100-L air sample.
Note: There are no other NIOSH methods for DEA or TEA. MEA can also be determined by Method 2007, which uses a silica gel tube for collection and GC/FID (flame ionization detector) for analysis.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | The methods says the samples are stable for at least 3 weeks if kept at 20°C. |
| Preservatives: | Store the samples at 20°C. |
| Required Preps: | None. |
| Collection Method: | The method recommends a 0.5 - 1L/min. flow rate with a collection volume of 5L - 300L. |
| Analytical Methodology: | IC |
| Documentation: | 
3509
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Triethanolamine | C6H15NO3 |
102-71-6 |
20 |
µg |
| Diethanolamine | C4H11NO2 |
111-42-2 |
13 |
µg |
| Ethanolamine | C2H7NO |
141-43-5 |
7 |
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.