This method is for the collection and analysis of iodine from workplace air. The sample is collected using a calibrated sampling pump and a glass tube containing impregnated activated beaded carbon (IABC). A modified sampling tube can be used to preclude any iodide-containing particulate if necessary. After sample collection the sample is desorbed with an aqueous solution containing 1.5 nM sodium carbonate and 1.5 mM sodium bicarbonate and analyzed by ion chromatography (IC).
Loss of iodine using IABC has been noted when sampling in relative humidities > 50%.
NOTE: This method supercedes method ID-177.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | Samples should be analyzed within 1 - 2 weeks of sample collection. |
| Preservatives: | Store samples at ambient or refrigerated temperatures. |
| Required Preps: | IABC tube, 100mg/50mg (SKC 226-80) |
| Collection Method: | The method recommends a 0.5 L/min. flow rate and a 2.5L sample collection volume. |
| Analytical Methodology: | IC with a pulsed electrochemical detector |
| Documentation: | 
ID-212
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Iodine | I2 |
7553-56-2 |
0.03 |
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.