Serum or Plasma Substance Concentration (Bromocresol Green Immunoassay)
This test measures the concentration of a specific substance in your blood using a bromocresol green-based immunoassay method. It helps assess levels of certain proteins, hormones, or other biomarkers.
["This test helps doctors monitor specific substances in your blood that may relate to health conditions or treatment responses."]
Key facts at a glance
- LOINC
- 45179-9
- Short code
- HG IgG CF Ser Ql IF
- Synonyms
- HG IgG CF Ser Ql IF
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- if
- CPT
- 82784
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
The test detects and quantifies a particular substance in your serum or plasma. The bromocresol green method helps identify and measure the concentration accurately. This test is often used to detect substances like hormones, enzymes, or proteins that may be elevated or low in certain health conditions.
Why It’s Done
Healthcare providers may order this test to diagnose or monitor conditions such as hormone imbalances, liver function, kidney function, or to check for certain infections or diseases. It can also be used in research or specialized clinical settings to track specific biomarkers.
Sample Collection and Preparation
A blood sample is typically collected from a vein in your arm. The blood is then processed to separate serum or plasma, which is sent to the lab for testing. This process usually takes a few minutes, and you may experience a brief pinch or slight discomfort during venipuncture.
Test Results and Interpretation
Results are expressed as a concentration value (e.g., mg/dL, nmol/L, or another unit depending on the analyte). Your results will be compared to a reference range provided by your healthcare provider to determine if your levels are within normal limits or if further evaluation is needed.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
BCG Immunoassay (Substance Concentration)
Frequently asked questions
What does this test measure?
How long will I need to prepare for this test?
What are the possible side effects of blood drawing?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy