Methadone (Blood)

Testing Laboratory

Department

Chemical Pathology

Delphic Registration Code (Alpha Code)

METD

Test Code (Numeric Code)

0921

Laboratory Handling

Phlebotomy

Tubes containing gel (SST and PST) are not acceptable.

Laboratory

LabPLUS Toxicology

Sample Stability

Stable for 2 weeks at 2-8°C
Stable up to 1 year at -20°C

Synonyms

Methadone

Turnaround Time

1 week

Performed once per week.

Specimen Type

• Serum

Specimen Requirements

Tube/Container Type:

Preferred

• Plain (Red Top)

Acceptable

• N/A

Preferred Sample Volume (ml)

4

Paediatric Specimen Requirements

Tube/Container Type:

Preferred

• N/A

Acceptable

• N/A

Additional Specimen Information

Laboratory Notes:

Gel tubes not acceptable.
Separate sample and place in freezer 36 in the HPLC rack.

Aliquot Instructions

Sample Type

• Serum

Minimum Volume (ml)

0.5

Transport to Lab

Ambient (8 - 24 degrees Celsius)
Chilled (2 - 8 degrees Celsius)
If overnight - Chilled (2 - 8 degrees Celsius)

Additional Referral/Aliquot Information

Centrifuge and separate blood as soon as possible after collection.

Aliquot Instructions: 1 mL serum preferred, with a minimum of 0.5 mL

Test Method

Liquid Chromatography Mass Spectrometry (LCMS)

Uncertainty of Measurement

12%

Ref: Clarke's Isolation and Identification of Drugs. Pharmaceutical Press, 1986.

Contact Information