This method is for the determination of hydroquinone. The sample is collected on cellulose ester membrane filter. Immediately after sample collection the filter is removed from the cassette housing to a glass jar and 10mLs of 1% acetic acid is added to the jar. This jar is sent to lab for analysis HPLC/UV. This method can be used when significant concentrations of hydroquinone vapor are not present.
The working range of the method is 0.7 to 8 mg/m³ for a 90 L air sample or 2 to 25 mg/m³ for a 30 L air sample.
NOTE: This is method S57 in a revised format.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | The method says samples are stable at least 7 days if kept at 25°C. |
| Preservatives: | Store at 25°C. |
| Required Preps: | 37mm cellulose ester membrane filter, 0.8 µm |
| Collection Method: | The method recommends a 1-4 L/min. flow rate and a collection volume of 30 L to 180 L. |
| Analytical Methodology: | HPLC/UV |
| Documentation: | 
5004
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Hydroquinone | C6H6O2 |
123-31-9 |
0.01 |
mg |
* 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.