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Chloride, Serum / Plasma

Item Value
Approval req'd? No
Available Stat? Yes
Test code CL
Test group Chloride
Performed by Parnassus & Mt. Zion Chemistry
In House Availability Test available 24 hours per day 7 days per week
Method Ion Specific Electrode (ISE)
Container type Gold top or Light Green top
Amount to Collect 1 mL blood Click here for Microdetermination info
Sample type Serum or plasma
Preferred volume 0.5 mL serum or plasma
Min. Volume 0.2 mL serum or plasma Click here for Microdetermination info
Units mmol/L
Normal range
0-17 years 97-108 mmol/L
≥ 18 years 97-108 mmol/L


1. Normal range for >18y adults was determined by testing 271 male and female healthy blood donors at UCSF.
2. Pediatric range same as adults as referenced in Soldin, "Pediatric Reference Intervals" 6th ed. 2007, Methods 1,2,3.
Synonyms Cl; Cl-; Electrolytes; Anion gap
Stability Room temperature 8 hours, refrigerated 2 days, frozen at -20C 1 week
Turn around times STAT 1 hour, Routine 4 hours
Additional information Bromide gives falsely high results.

The anion gap is calculated from the serum Sodium, Chloride and Total CO2 values using the equation: Na-(CL+CO2). The calculation is automatic whenever all three of the electrolytes are ordered together. It is not a separately orderable test. Normal range for the Anion Gap is 4-14.
LOINC code 2075-0
Last Updated 2/17/2012 9:57:03 AM
Entry Number 187
Lab Procedure Link Click here for Procedure
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