This method is for the determination of major and minor elements in combustion residues (ash) from coal utilization processes. The analysis is for the nine major components of coal which are silicon dioxide, aluminum oxide, ferric oxide, titanium dioxide, phosphorus pentoxide, calcium oxide, magnesium oxide, sodium oxide, and postassium oxide using ICP (inductively coupled plasma).
Knowledge of ash composition is also useful in predicting the behavior of ashes and slags in combustion chambers. Utilization of the ash by-products of coal combustion sometimes depends on the chemical composition of the ash.
Note that the chemical composition of laboratory-prepared coal ash may not exactly represent the composition of mineral matter in the coal or the composition of fly ash and slag resulting from commercial-scale burning of the coal.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | None specified in the method. |
| Preservatives: | None specified in the method. |
| Required Preps: | 4 or 8oz Polyethylene bottle with Teflon-lined lid. |
| Collection Method: | Grab sampling |
| Analytical Methodology: | ICP |
| Documentation: | 
D3682
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Potassium oxide | K2O |
12136-45-7 |
0.1 |
% |
| Calcium oxide | CaO |
1305-78-8 |
0.1 |
% |
| Magnesium oxide | MgO |
1309-48-4 |
0.1 |
% |
| Sodium oxide | Na2O |
1313-59-3 |
0.1 |
% |
| Phosphorus pentoxide | P2O5 |
1314-56-3 |
0.1 |
% |
| Iron oxide | Fe2O3 |
1317-60-8 |
0.1 |
% |
| Aluminum oxide | Al2O3 |
1344-28-1 |
0.1 |
% |
| Titanium dioxide | TiO2 |
13463-67-7 |
0.1 |
% |
| Silica (SiO2) | SiO2 |
7631-86-9 |
0.1 |
% |
* 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.