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NIST Urine Standard Reference Materials (SRM)
| Standard Reference Material (SRM) | brief description |
|---|---|
| 3667 | creatinine in frozen human urine |
| 3671 | nicotine metabolites in human urine (frozen, 3 levels) |
| 3672 | organic contaminants in smokers’ urine (frozen) |
| 3673 | organic contaminants in nonsmokers |
| 3674 | organic contaminants in fortified smokers |
