24 hour urine - acid bottle preferred (see comment).
If overnight - Frozen
Reference range: 0.4 – 3.4 mmol/24 hours.
Spectrophotometric / enzymatic
$80.83 (Exclusive of GST)
Please note that this test "Citrate, urine" should be requested for patients with renal stones. For dialysis patients please see the "Citrate, plasma" listing.
Non-acidifed samples may give falsely low citrate due to bacterial decomposition