Biochemistry Sample Requirements
Most routine Clinical Biochemistry blood tests can be undertaken on 6 ml.
sample collected into a Vacutainer SST tube (yellow top). Common exceptions are
on shown on
chart (please click).
Glucose analysis may be undertaken on unpreserved
samples, but the result may be lowered if the sample is not analysed
within 4 hours, or if glucose is being metabolised rapidly (e.g. in septicaemia
or some forms of leukaemia). Under these circumstances, a 2ml samples in a
fluoride oxalate tube (grey top) is required
Requests for alcohol are not routinely available without prior
discussion with the laboratory. A 2ml samples in a fluoride oxalate tube
(grey top) is required.
Paediatric samples for most Clinical Biochemistry tests may be
collected into a 2 ml heparinised micro tube (orange cap). 2 ml fluoride oxalate micro tubes are also available for
All blood gas samples are analysed 'Point of Care' and require an
arterial sample taken into an heparinised syringe.
Plain 25ml containers (white top) are available from supplies
distribution for random, MSU and
EMU samples. 24 hour urine containers with any necessary preservative, are
available from Pathology reception. Information
on urine collection and preservatives required is available.
Plain 25ml faecal containers (blue top) are available
from supplies distribution.
Collection Conditions Required
Some tests require special collection or handling prior to analysis e.g.
immediate processing, protected from light, timed collection. Please
refer to individual test page in the
Version 1.0 /
December 2014 Approved by: Consultant Biochemist