Quaternary Ammonium Compounds (QAC)
-Direct Binary Complex Method (Method 8337)
Scope:
The reagents buffer the sample to an acidic pH and include a masking agent to remove potential interferences. The indicator reacts with quaternary ammonium compounds in the sample and forms a pale pink to vivid purple color. This test is applicable to monitor quaternary ammonium compounds in swimming pools and cooling towers. The measurement wavelength is 575 nm.
-Hach Company/Hach Lange GmbH 03/2014, Edition 8
Method Data
| Method 8337 | |
|---|---|
| Hold Time | 28 days |
| Preservation | To preserve samples for later analysis, adjust the sample pH to less than 2 with concentrated sulfuric acid (approximately 2 mL per liter). No acid addition is necessary if the sample is tested immediately. Keep the preserved samples at or below 6 °C. |
| Sample Volume | 250 mL glass container |
| Collection Method | Collect samples in glass bottles that have been rinsed several times with sample. Do not use plastic containers, which can adsorb quaternary ammonium compounds. |
| Method Refernce | HACH Method 8337 |
Analyte List
| Analyte | Formula | CAS Number |
|---|---|---|
| Quaternary Ammonium Compounds |
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