835 SOLUBLE ELEMENTS
Solubles: Al, B, Ca, Cu, Fe, K, Mg, Mn, Na, Si, Zn
Quantitative determination by AAS, AES and ICP-AES.
Summary: This method quantitatively determines the concentration of the listed elements in water samples by flame Atomic Absorption and Emission Spectrometry (AAS, AES) and Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES). Approximately 100 mL per sample is requested. If sample is limited, some analyses are done simultaneously so the total sample required may be reduced. The EPA recommends that water for soluble analytes be filtered and acidified at the time of collection. Lower detection limits than those listed in the table below may be possible. Contact the lab if lower detection limits are needed or if elements not listed in the table are needed.
| Element | MDL (mg/L) | Instrument(s) |
| Ag | 0.01 | ICP |
| Al | 0.05 | ICP |
| B | 0.1 | ICP |
| Ca | 0.5 | ICP |
| Cd | 0.005 | ICP |
| Cr | 0.005 | ICP |
| Cu | 0.1 | ICP or AAS |
| Fe | 0.1 | ICP or AAS |
| K | 0.05 | AES |
| Mg | 0.5 | ICP |
| Mn | 0.1 | ICP or AAS |
| Mo | 0.01 | ICP |
| Na | 0.1 | AES |
| Ni | 0.05 | ICP |
| P | 0.05 | ICP |
| Pb | 0.05 | ICP |
| Si | 0.1 | ICP |
| Zn | 0.02 | ICP or AAS |
EPA Method 200.7, Trace Elements in Water Solids, and Biosolids by Inductively Coupled Plasma-Atomic Emission Spectrometry
EPA Method 258.1, Potassium (AA, Direct Aspiration)
EPA Method 273.1, Sodium (AA, Direct Aspiration)