This method is for the determination of trace metals from aqueous matrices by inductively coupled plasma atomic emission spectrometry (ICP). An aliquot of the sample is solubilized or digested using with acid following the appropriate SW-846 preparation methods (3000 series methods). See Chapter 3 of SW-846.
If the analysis is for dissolved metals then acid digestion is not necessary if the sample ha been filtered and acid preserved prior to analysis. The filtering for dissolved metals should be done immediately after sample collection.
NOTE: This method updates and replaces Methods 6010, 6010A, and 6010B.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | 6 months from sample collection to analysis for all elements except Hg which is 28 days from sample collection to analysis |
| Preservatives: | Add HNO3 to pH < 2. |
| Required Preps: | 500mL Glass, HDPE or PTFE bottle |
| Collection Method: | Grab sampling |
| Analytical Methodology: | ICP/AES |
| Documentation: | 
6010D
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Aluminum | Al |
7429-90-5 |
30 |
µg/L |
| Iron | Fe |
7439-89-6 |
4.1 |
µg/L |
| Lead | Pb |
7439-92-1 |
28 |
µg/L |
| Lithium | Li |
7439-93-2 |
2.8 |
µg/L |
| Magnesium | Mg |
7439-95-4 |
20 |
µg/L |
| Manganese | Mn |
7439-96-5 |
0.93 |
µg/L |
| Mercury | Hg |
7439-97-6 |
0.007 |
mg/L |
| Molybdenum | Mo |
7439-98-7 |
5.3 |
µg/L |
| Nickel | Ni |
7440-02-0 |
10 |
µg/L |
| Potassium | K |
7440-09-7 |
15 |
µg/L |
| Silver | Ag |
7440-22-4 |
4.7 |
µg/L |
| Sodium | Na |
7440-23-5 |
19 |
µg/L |
| Strontium | Sr |
7440-24-6 |
0.28 |
µg/L |
| Thallium | Tl |
7440-28-0 |
27 |
µg/L |
| Tin | Sn |
7440-31-5 |
17 |
µg/L |
| Titanium | Ti |
7440-32-6 |
5 |
µg/L |
| Antimony | Sb |
7440-36-0 |
21 |
µg/L |
| Arsenic | As |
7440-38-2 |
35 |
µg/L |
| Barium | Ba |
7440-39-3 |
0.87 |
µg/L |
| Beryllium | Be |
7440-41-7 |
0.18 |
µg/L |
| Boron | B |
7440-42-8 |
3.8 |
µg/L |
| Cadmium | Cd |
7440-43-9 |
2.3 |
µg/L |
| Chromium | Cr |
7440-47-3 |
4.7 |
µg/L |
| Cobalt | Co |
7440-48-4 |
4.7 |
µg/L |
| Copper | Cu |
7440-50-8 |
3.6 |
µg/L |
| Vanadium | V |
7440-62-2 |
5 |
µg/L |
| Zinc | Zn |
7440-66-6 |
1.2 |
µg/L |
| Calcium | Ca |
7440-70-2 |
6.7 |
µg/L |
| Silica (SiO2) | SiO2 |
7631-86-9 |
17 |
µg/L |
| Phosphorus | P |
7723-14-0 |
51 |
µg/L |
| Selenium | Se |
7782-49-2 |
50 |
µg/L |
* 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.