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 Pooled, liquid human serum with or without exogenous added analyte
Nominal sample volume (mL) 0.4
Programme Director(s) / Organiser(s) Rachel Marrington
Analyte Approximate Range Default Scheme Units
25-OH Vitamin D2 0 – 250 nmol/L
25-OH Vitamin D3 0 – 250 nmol/L
Total 25-OH Vitamin D 0 – 250 nmol/L
Vit D Interpretation D, I, A or T
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