Scheme Particulars Indicative Details
Accreditation body UKAS
UKAS Accredited Proficiency Testing Provider No 7860
Number of distributions per year (nominal) 12
Specimens per distribution 3
Frequency of distribution Monthly
Material distributed Blood spots
Sample volume (mL) N/A ‐ card supplied
Programme Director(s) / Organiser(s) Finlay MacKenzie
Analyte Approximate Range Default Scheme Units
Initial TSH 0 – 250 mU/L WB
Initial TSH Interpretation N or F
Final TSH 0 – 250 mU/L WB
CHT interpretation N, B or P
Initial IRT 10 – 200 ng/mL [µg/L] WB
Initial IRT interpretation N or F
Final IRT 10 – 200 ng/mL [µg/L] WB
CF interpretation N or P
Initial Phe 20 – 2000 µmol/L WB
Initial Phe interpretation N or F
Final Phe 20 – 2000 µmol/L WB
Tyr 30 – 2000 µmol/L WB
PKU interpretation N, P or O
Initial C8 0 – 6 µmol/L WB
Initial C8 interpretation N or F
Final C8 0 – 6 µmol/L WB
C10 0 – 6 µmol/L WB
C8/C10 ratio 0.1 – 30
MCADD interpretation N or P
C5 0 – 8 µmol/L WB
C5DC 0 – 2 µmol/L WB
Leu 50 – 1200 µmol/L WB
Met 5 – 250 µmol/L WB
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