Registration deadline: 27 April 2026
Sample dispatch: 26 May 2026
EQA scheme period: 1 June – 20 June 2026
RfB is expanding its range of external quality assurance offerings in laboratory medicine.
In June 2026, a pilot EQA scheme on amino acid analysis in urine will be offered.
Analytes included in the pilot EQA scheme:
| 1‑methylhistidine | cystathionine | methionine |
| α‑aminobutyric acid | cysteine sulfate | ornithine |
| β‑aminoisobutyric acid | cystine | oxoproline/pyroglutamic acid |
| 3‑methylhistidine | ethanolamine | phenylacetylglutamine |
| 4‑hydroxyproline | γ‑aminobutyric acid | phenylalanine |
| acetyltyrosine | glutamine | phosphoethanolamine |
| adenosylhomocysteine | glutamic acid | phosphoserine |
| alanine | glycine | pipecolic acid |
| allo‑Isoleucine | histidine | proline |
| α‑aminoadipic acid | homocitrulline | saccharopine |
| anserine | homocystine | sarcosine |
| arginine | hydroxylysine | serine |
| argininosuccinic acid | hydroxykynurenine | taurine |
| asparagine | isoleucine | threonine |
| aspartic acid | leucine | tryptophan |
| β‑alanine | kynurenine | tyrosine |
| carnosine | creatinine | valine |
| citrulline | lysine |
Participation in this pilot EQA scheme is free of charge for registered participants. Only shipping costs will be charged in accordance with the shipping price list.
Registration is via your participant account at www.rfb.bio.
The number of participants is limited to 20, and places will be allocated in the order in which registrations are received. After the registration deadline, you will be notified whether participation in the pilot EQA scheme is possible.
We look forward to your participation.
Yours sincerely, Your RfB Team
