This method is for the determination of arsenic (As), cadmium (Cd), lead (Pb), selenium (Se), and zinc (Zn) in human and pet food.
The sample is digested with nitric acid to produce a digestate. Cd and Pb are analyzed by anodic stripping voltametry (ASV). As, Se, and Zn are analyzed by atomic absorption spectrophotometry (AAS) after generation of metal hyrides for As and Se.
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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: | 125mL glass of plastic bottle with Teflon-lined lid. |
| Collection Method: | Grab sampling |
| Analytical Methodology: | Anodic stripping voltametry (ASV) or atomic absorption spectrophotometry (AAS) |
| Documentation: | 
986.15
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Lead | Pb |
7439-92-1 |
1 |
mg/100 g |
| Arsenic | As |
7440-38-2 |
1 |
mg/100 g |
| Cadmium | Cd |
7440-43-9 |
1 |
mg/100 g |
| Zinc | Zn |
7440-66-6 |
1 |
mg/100 g |
| Selenium | Se |
7782-49-2 |
1 |
mg/100 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.