Method 160.1

Residue, Filterable (Gravimetric, Dried at 180°C)

This method is for the determination of filterable residue from drinking, surface, and saline waters, domestic and industrial wastes. A well-mixed sample is filtered through a standard glass fiber filter, the filtrate is evaporated and dried to constant weight at 180°C.  If non-filterable residue is being determined, the filtrate from that method may be used for filterable residue. Filterable residue is defined as those solids capable of passing through a glass fiber filter and dried to constant weight at 180°C.

The practical range of the method is 10 mg/L to 20,000 mg/L.

(EPA: Office of Water)


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Method Data

Hold Times, Preservatives, Preps, Collection, Analytical & Documentation
Holding Time:   7 days from sample collection to analysis.
Preservatives:   Store sample at 4°C to reduce microbiological decomposition of solids.
Required Preps:   Glass fiber filter discs, 4.7 cm or 2.1 cm, without organic binder
Collection Method:   Grab sampling
Analytical Methodology:   Gravimetric
Documentation:   160.1

Analyte List*

Analyte Formula CAS Number Detection Limit
Total Dissolved Solids

* 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.