Plasma Amino Acids by Ion Exchange


Plasma amino acids by ion-exchange is reserved for cases not reliably measured by the reverse phase HPLC technique. This includes the sulphur amino acid homocystine (measured as total homocysteine); and the amino acids citrulline and argininosuccinic acid.

Request a test

To request this test please send sample with a request providing patient ID (three identifiers), specimen information, assay required, relevant clinical details and sender information. Before sending sample please read details on requesting and labelling by clicking on the link. Please also refer to any additional information provided for this test.

Additional information

Sample should be spun and separated within 30 minutes of collection. Sample should be stored frozen at �20�C until analysis.

Sending address

Chemical Pathology Reception
Level 1, Camelia Botnar Building
Great Ormond Street Hospital
Great Ormond Street

Laboratory service

Chemical Pathology

Sample requirements

0.5ml Lithium Heparin plasma is the preferred type. Serum samples are acceptable.

Reference range

Please click on the link to view reference range

Turnaround time

2-3 weeks

Disease / group

Inherited amino acid disorders


Upon request

Call in advance?

Not required

Chemical Pathology

The Chemical Pathology Laboratory provides an extensive range of services covering both routine biochemistry and specialised analysis and interpretation.

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