This method describes the collection and analysis of airborne chlorine in the workplace. It is applicable for both Short-Term (STEL) and Time Weighted Average (TWA) exposure evaluations. A calibrated personal sampling pump is used to draw a known volume of air through a midget fritted glass bubbler containing a 0.1% sulfamic acid solution. An aliquot of the sulfamic acid solution is added to a buffered potassium iodide solution. Any chlorine contained in the first solution oxidizes the potassium iodide to iodine which is then measured with a residual chlorine ion specific electrode.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | Collected liquid samples are stable for at least 30 days. Analyze samples the same day they are prepared for analysis. |
| Preservatives: | Special precautions are not necessary during storage. |
| Required Preps: | Midget fritted glass bubbler containing 0.1% sulfamic acid. |
| Collection Method: | Glass Bubbler: 15L (STEL) @ 1/Lmin; 240L (TWA) @ 1L/min. |
| Analytical Methodology: | Ion Specific Electrode |
| Documentation: | 
ID-101
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Chlorine | Cl2 |
7782-50-5 |
2.5 |
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.