- When testing for protein using the SSA precipitation method, a urine sample that is not clear should be centrifuged and the supernatant used for testing.
- Daylight or fluorescent light is recommended when interpreting results.
- Quality control checks should be performed by testing known negative and positive specimens or controls.
False-positive results can occur when the urine specimen:
- Contains x-ray contrast media
- Contains a high concentration of certain antibiotics
- Is turbid
False-negative results can occur when the urine specimen:
- Is a highly buffered alkaline urine (may need to acidify the urine to a pH of 7.0 or lower before performing the SSA test).
- Is very dilute
- Is turbid
