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Rubidium Serum Concentration (Mass Concentration)

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

This test measures the amount of rubidium, a trace mineral, in your blood serum. It may be used in specific clinical evaluations, including certain genetic or metabolic studies.

Quick summary

["Rubidium levels in blood can help assess rare genetic conditions or metabolic disorders."]

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

Key facts at a glance

LOINC
5335-5
Short code
RUBV IgM Ser IA-aCnc
Synonyms
RUBV IgM Ser IA-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
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

Why Might This Test Be Ordered?

Your healthcare provider may recommend this test if you have symptoms or a family history suggestive of conditions like congenital rubidium deficiency, certain genetic disorders, or metabolic imbalances. It could also be part of a broader diagnostic workup for unexplained symptoms like muscle weakness, growth delays, or neurological issues.

What Does This Test Involve?

A blood sample is drawn from a vein, typically in your arm. The sample is then processed to separate serum, which is analyzed for rubidium concentration using specialized laboratory techniques.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for a few hours before the test if instructed by your provider. Wear comfortable clothing and bring any medications you’re currently taking.

What to Expect After the Test

The blood draw usually takes a few minutes. You may feel slight discomfort, but it typically resolves quickly. You can resume normal activities immediately unless your provider advises otherwise.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Serum Rubidium Level

Frequently asked questions

Why is rubidium testing important in diagnosing certain conditions?
Rubidium testing is particularly important for diagnosing rare genetic disorders, such as congenital rubidium deficiency, which can cause developmental delays, muscle weakness, or other symptoms. It may also be used in research or specialized clinical settings to monitor metabolic processes.
How is rubidium measured in the blood?
Rubidium is measured using advanced laboratory techniques, such as mass spectrometry or specialized immunoassays, which detect and quantify the mineral’s concentration in your serum. These methods are highly sensitive and precise for trace elements like rubidium.
Can dietary rubidium intake affect test results?
Dietary rubidium intake is minimal and generally does not significantly affect test results. However, if you have specific dietary restrictions or concerns, discuss them with your healthcare provider to ensure accurate interpretation of your results.
  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