This method is for the collection and analysis of hexavalent chromium from workplace air. The sample is collected on a NaOH coated binderless quart fiber filter or PVC filter. After sample collection the filter is extracted with 10% Na2CO3/2% NaHCO3 (BE) and phosphate buffer/magnesium sulfate (PBM) solutions (BE/PBM) and analyzed by ion chromatography (IC) with UV-vis detection after post column derivatization with 1,5-diphenyl carbazide.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | 24 hours from sample collection to analysis if collected on a PVC filter. 8 days from sample collection to analysis if collected on a PVC filter from a welding operation. 6 days from sampling to analysis if collected on PVC filter from a chromium platin |
| Preservatives: | None specified in the method. |
| Required Preps: | 37mm NaOH coated quartz fiber or PVC filter |
| Collection Method: | The method recommends a flow rate of 2.0 L/min. with a 960L sample collection volume. |
| Analytical Methodology: | IC |
| Documentation: | 
ID215
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Hexavalent chromium | Cr+6 |
18540-29-9 |
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.