All Cronus filters are manufactured in compliance
with ISO 9001 using validated
production processes. This ensures consistency, reliability
and membrane integrity, week after week, year after
Additionally, samples of all the filter batches and
membranes are held for 24 months from production for
reference. This enables your current batch to be tested
in our labs under your conditions should you require
assistance with an application.
Cronus filters are made using inert, extractable
free virgin polypropylene housings with luer lock
and luer slip fittings. Each filter is sealed
using an ultrasonic process to ensure that
no adhesives can contaminate your samples —
essential to maintain your sample integrity. At the
same time the process creates a physically stronger
filter to protect against potentially dangerous bursting.
Tested to Certified Quality
Every single batch of Cronus syringe filters has to
pass a rigorous set of tests:
• Bubble Point —
tests the pore size of the membrane again.
• Water Breakthrough
— confirms the pore size and tests the backpressure
required to pass a water sample. This will be different
for hydrophilic and hydrophobic membranes.
• Burst Pressure —
tests the membrane strength and that the membrane
has been mounted correctly in the filter.
• Filter Integrity
— tests the actual filter fabrication and moulding
to ensure that the housing rating is correct.
• HPLC Extractables
— tests each membrane to ensure low extractable
levels and consistency from lot to lot.
• Efficiency —
tests the overall efficiency of the filter using known
standards. Cronus filters are rated for high sample
volume and filtration efficiency.
• Filter Retention Volume
— tests for residual sample left in the filter
The full laboratory test results and certificate of
compliance for any filter are available on request.
HPLC results can only be as good as the weakest component
so consistent and reliable sample filtration is essential.
Cronus syringe filters represent a new standard in
sample preparation excellence and so will give you
complete confidence in your results.
» Browse the full range of
filters and find the filter for your application.