This method is for the determination of total dissolved solids dried at 180°C from drinking water. A well-mixed sample is filtered through a standard glass fiber filter, and the filtrate is evaporated to dryness in a weighed dish and dried to constant weight at 180°C. The increase in dish weight represents the total dissolved solids. This procedure may be used for drying at other temperatures. The results may not agree with the theoretical value for solids calculated from chemical analysis of sample.
The filtrate from the total suspended solids determination may be used for determination of total dissolved solids.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | No more than 7 days from sample collection to analysis but preferably do not hold samples more than 24 hours from collection to analysis. |
| Preservatives: | Cool samples to 4°C to minimize microbiological decomposition of solids. |
| Required Preps: | 250mL Glass or HDPE bottle with Teflon-lined lid |
| Collection Method: | Grab sampling |
| Analytical Methodology: | Gravimetric |
| Documentation: | |
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Total Dissolved Solids | 0.1 |
g | ||
* 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.