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Laboratory:

Clinical Biochemistry (METABOLIC)

Test Name:

AMINO ACIDS, QUANTITATIVE - (U)

Test Code: AAQU

Clinical Information:

Test Indications:

Evaluation of patients with suspected inborn errors of amino acid metabolism.

Monitoring patients with aminoacidopathies.

Collection Devices:

Preferred Device:	2 - Urine Collection 12 mL Tube Urine Collection 12 mL Tube Manufacturer: Sarstedt Canada Inc. (vendor) Catalogue #:
Alternate Device:	1 - Urine Collection Container, Leak-Proof Random 100mL

Specimen Required:

Urine: 10.0 mL

Pediatric Urine: 1.0 mL

Prepare TWO aliquots immediately after collection.

One aliquot for urine creatinine to Automated chemistry can be sent refrigerated and the second aliquot for amino acid testing MUST be FROZEN within 1 hour of collection.

DO NOT freeze and ship 100 mL urine container.

Specimen Stability:

Ambient: Not stable

Refrigerated: 4 hours (excluding thiol-containing amino acids)

Frozen: 14 days at -20C or 60 days at -80C

Referral:

Store and ship aliquots frozen. Thawed samples are not suitable for testing.

Additional aliquot must be shipped for urine creatinine.

Do NOT ship frozen 100 mL urine containers.

Send specimen to Health Sciences Centre – MS5 (Biochemical Genetics)

Requisition:

_SH Biochemical Genetics Laboratory Requisition (R250-10-69)

Reference Values:

A descriptive report will be sent.

Method of Analysis: Liquid Chromatography Tandem Mass Spectrometry

Availability:

Within 1 Week