Table 3.
Interference testing.
| Interferent | Substance test concentration convention Units (SI units) | % Bias in Level 1 | % Bias in Level 2 | % Bias in Level 3 |
|---|---|---|---|---|
| Intralipid | 2,000 mg/dL(intentionally blank*) | 9% | 1% | 2% |
| Cholesterol | 500 mg/dL (12.95 mmol/L) | 5% | 3% | 3% |
| Human serum albumin | 6 g/dL (60 g/L) | 9% | 6% | 8% |
| Human hemoglobin | 500 mg/dL (5 g/L) | 15% | 16% | 22% |
| 200 mg/dL (2 g/L) | 1% | 2% | 2% | |
| Direct bilirubin (conjugated) | 60 mg/dL (712 μmol/L) | 0% | 5% | 6% |
| Indirect bilirubin (unconjugated) | 40 mg/dL (684 μmol/L) | 4% | 3% | 2% |
| Rheumatoid factor serum | (193 U/mL) | 0% | 0% | 8% |
| Biotin | 3,500 ng/mL (14.3 μmol/L) | 4% | 2% | 0% |
NfL, neurofilament light chain.
*
Family of compounds that includes a wide variety of molecular weight substances, therefore marked intentionally blank.