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Serum or Plasma Protein Electrophoresis (Qualitative)

Published: August 9, 2026Updated: August 16, 2026

This test measures the different types of proteins in your blood or plasma using electrophoresis, a method that separates proteins based on size and charge. It helps identify abnormal protein patterns that may indicate conditions like multiple myeloma, liver disease, or other disorders.

Quick summary

["This test helps doctors spot unusual protein levels that could signal serious health issues."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
112044-3
Short code
Spec Endscpy
Synonyms
Spec Endscpy
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
endoscopy
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

Electrophoresis separates proteins into bands based on their electrical charge and molecular weight. The test detects variations in protein distribution, such as the presence of monoclonal proteins (e.g., light chains or immunoglobulins) or abnormal globulin fractions.

Why It’s Done

Doctors order this test to investigate symptoms like unexplained weight loss, fatigue, bone pain, or recurrent infections. It’s also used in screening for conditions like multiple myeloma, lymphoma, or liver/kidney diseases that affect protein production.

Sample Collection

A blood sample is drawn from a vein, usually in your arm. The blood is processed to separate serum (liquid part after clotting) or plasma (liquid part before clotting). No special preparation is needed, but fasting may be advised depending on the lab’s protocol.

What to Expect

After drawing blood, you’ll rest for a few minutes. The results are typically ready within 2–3 business days. If abnormal findings are detected, follow-up tests or biopsies may be recommended.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Qualitative Protein Electrophoresis

Frequently asked questions

How long does it take to get results?
Results are usually available within 2–3 business days, depending on lab processing times. If your doctor requests follow-up testing, additional delays may occur.
Can I eat or drink before this test?
Most labs do not require fasting for this test, but always confirm with your healthcare provider or the lab for specific instructions. Avoiding certain medications (e.g., blood thinners) may also be advised if instructed.
What does a ‘qualitative’ result mean?
A qualitative result describes whether certain proteins are present or absent in your sample, rather than measuring exact amounts. For example, it may show bands of abnormal proteins that need further quantification or follow-up testing.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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