Methodology
Indirect Ion-Selective Electrode
Specimen Type
Body Fluid
Performing Lab
UCSD CALM Chemistry
Epic ID
LAB90034
Lab Test Days
Daily
Standard TAT
24 Hours from receipt of sample
Collection Information
Specimen Required
2-6 mL Body Fluid
Container Type
Sterile Container
Processing Information - Lab Use Only
Transport Temperature
Room Temp-OK/Refrigerated-OK/Frozen-OK
Specimen Stability
Room Temp: 2 Weeks; Refrigerated: 2 Weeks (preferred); Frozen: 6 Months
Rejection Criteria
Specimens collected in citrate, EDTA, potassium oxalate, or sodium fluoride or potassium oxalate; Contaminated or hemolyzed specimens
Test Volume Required
6 mL Body Fluid
Minimum Test Volume
2 mL Body Fluid
Processing Instructions
Centrifuge and separate from cells into a transport tube. Complete a UCSD Chemistry requisition and submit with specimen refrigerated. Specify source in comments, on specimen and on requisition. If requested STAT or urgent, call a RUSH TForce pickup.
Revised
6/12/25
Initials
SA