DEQAS logo 

D E Q A S    (Vitamin D External Quality Assessment Scheme) 

Scheme Organiser: Emma Walker  
Administration: Julia Jones  

Endocrine Laboratory - Charing Cross Hospital - Fulham Palace Road - London W6 8RF - UK  
Telephone: +44 (0)20 331 33645 - Facsimile: +44 (0)20 331 17007 - Email:    

Registration Form

Financial Year: 1 April 2020 - 31 March 2021

The Scheme is open to all bona fide laboratories involved in the analysys of 25 hydroxyvitamin D (25OHD) and 1,25 dihydroxyvitamin D (1,25(OH)2D) assays.

Please send no remittance now. You will be invoiced for the amount.

Main Contact Details:


Contact Name:


Organisation Name:








Town / City:


County / State:


Zipcode / Postcode:




Telephone No:






Email *:


* Please ensure that your email address is correct as this will be used for all future correspondence

Sample address (the name and contact details of the person to whom samples should be sent. Check and complete if different from main address):    

Finance / Invoice address (check and complete if different from main address):    

Scheme (click the scheme(s) you wish to register for)


Order Number*

5 samples per Round. (4 Rounds per year.)

5 samples per Round. (4 Rounds per year.)

Limited availability - currently only available to UK and Irish participants
3 samples per Round. (4 Rounds per year.)


If available, please provide an order number here. It is not necessary to enter a separate order number for each scheme.

Each sample is approximately 0.6 ml (25OHD) and 1.50 ml (1,25OH)2D. If this is insufficient for your assay, please indicate volume required in additional information below



27 November 2020