Scheme Particulars Indicative Details
Accreditation body UKAS
UKAS Accredited Proficiency Testing Provider No 7860
Number of distributions per year (nominal) 11
Specimens per distribution 3
Frequency of distribution Monthly
Material distributed Single donations of liquid human serum with or without exogenous methyl malonic acid added
Nominal sample volume (mL) 0.5 ml
Programme Director(s) / Organiser(s) Finlay MacKenzie
Analyte Approximate Range Default Scheme Units
HoloTC 10 – 150 pmol/L
HoloTC Interpretation L, I, N or H
Methylmalonic acid 0 – 360 nmol/L
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