Chloride concentration (serum/plasma)

This test measures the amount of chloride, an important electrolyte, in your blood. It is often done as part of a basic or comprehensive metabolic panel to check your body's fluid balance, hydration, and acid-base status.

Doctors may order a chloride test to check for conditions like dehydration, kidney disease, heart problems, or metabolic imbalances. It’s often done alongside sodium tests to evaluate overall electrolyte health.

Usually, no special preparation is needed for this test. If it is part of a larger panel, you may be asked to fast for several hours beforehand. Tell your doctor about all medicines and supplements you take, and drink water normally unless instructed otherwise.

No special preparation is needed unless instructed. You may drink water but avoid eating or smoking for a few hours before the blood draw. If you’re on a urine test, follow your provider’s instructions for hydration and timing.

A healthcare professional will clean the skin on your arm, wrap a band around your upper arm, and draw a small sample of blood from a vein. The sample is sent to a laboratory, and your results are usually ready within a day or two.

Blood is drawn from a vein (usually in your arm) and sent to a lab. Plasma or serum is analyzed to measure chloride concentration using a specialized method like ion-selective electrode testing or automated chemistry analysis.

Normal chloride levels for adults typically fall between 96 and 106 mEq/L, although exact ranges can vary slightly from one laboratory to another. Your doctor will interpret your value together with other electrolytes, such as sodium and potassium, to understand what it means for you.

Results are reported in millimoles per liter (mmol/L). While exact ranges vary by lab, typical values fall between lower and upper limits that help identify deviations from normal electrolyte balance.