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Test Code AAQNT Amino Acids Quant, Plasma

Clinical System Name

Amino Acids Quant, Plasma





Measurement of 25 amino acids by ion exchange chromatography.


Sample Requirements

Specimen: Whole Blood

Container(s): Dark Green/Sodium Heparin, Lt. Green/Lithium Heparin

Preferred Vol:  1 mL

Minimum Vol: 0.5 mL


Note: Serum  and EDTA plasma are also acceptable but not preferred. For infants and children, sample collection prior to feeding or 2-3 hours after a meal is preferred.



Processing Instructions

Reject due to:



Temp:-20 C

Storage location: -20 C BCG  Box


Off-site collection: Spin and freeze plasma/serum and ship frozen.


Temperature Time
Room temp ≤ 2 hr
Refrigerated 24 hrs
Frozen (Plasma/Serum only) 1 month



STAT Performed TAT
N M-F 2-5 days


Contact the Biochemical Genetics Lab for requests outside of stated availability (206)987-2216.

Performing Laboratory

Seattle Children's Laboratory    


Department:  Biochemical Genetics

Phone Number: 206-987-2216




Method: Ion exchange chromatography with post column derivatization

Analytical Volume: 0.1 mL


CPT Codes


Special Instructions

For infants and children draw sample prior to feeding  or 2-3 hours after a meal.


Biochemical Genetics Requisition


On the requisition include clinical information needed for appropriate interpretation.  (Age, gender, diet (e.g. TPN therapy), drug therapy and family history)

Clinical Utility

Amino acid analysis can be useful in the clinical work up, diagnosis, or dietary monitoring of the following disorders:

Phenylketonuria, tyrosinemia, maple syrup urine disease, urea cycle defects (argininosuccinic aciduria, argininemia, CPS, OTC deficiency, citrullinemia), non-ketotic hyperglycinemia, homocystinuria, defects of cobalamin metabolism, cystinuria (urine only), ornithinemia, and lysinuric protein intolerance. Amino acid analysis is also performed for nutritional monitoring.