food hygiene & safety 25
ATP hygiene detection testing
adds precison and accuracy
Martin Easter reports on an ATP
bioluminescence detection systems.
TP bioluminescence is a well established
A
rapid method that gives instant results, and
is used to measure cleanliness and hygiene.
Advances in solid-state technology have
enabled new instruments to be developed that deliver
performance, convenience and robustness at low cost.
One such instrument, the SystemSURE Plus from
Hygiena International, has the following features:
p Low background that minimises signal to noise
Fig. 2. Variation of ATP detection systems.
ratio which maximises sensitivity and enables reliable
detections at low ATP levels therefore reducing false p Secure data download to PC by either of two software
positives. options including advanced, simplified trend analysis
p The output scale (Relative Light Units, RLU) is (Sure Trend) with pre-defined and customised report
quantitative and 1 RLU=1 fmol ATP (higher RLU generation at the click of a button.
numbers do not mean higher sensitivity). p Other features include sampling plans, Re-test tag
p Self-calibration that significantly reduces service and and trace function, on-screen statistical review of results
maintenance costs, and the low voltage supply means without the need to download to PC.
that simple AA pen battery can be used compared to
expensive dedicated mains/re-chargeable systems. he sample collection and testing devices
T
are integrated all-in-one and ready-to-use,
and contain a novel liquid-stable reagent
formulation. These sampling/testing devices
are available for solid surfaces (Ultrasnap) and for liquid
samples (Aquasnap) such as CIP rinses and other water
samples.
All sampling devices have a simple snap and squeeze
activation step with 12-months shelf life and tolerance to
ambient temperature abuse.
These devices are slim and light weight thus
combining ease-of-use with reduced environmental
impact because they contain fewer parts and are
50–60 per cent lighter than comparable products.
Low background noise
One of the features of the systems is the very low
background noise that means that the system can clearly
differentiate between results at very low RLU values
unlike other systems. This low background confers a high
degree of precision and sensitivity to the system at low
ATP levels.
Campden-BRI (the largest membership based
food and drink research centre in the world) was
commissioned to test the SystemSURE Plus Instrument.
While Campden-BRI does not endorse specific products
or services its conclusions were that SystemSURE Plus
Fig. 1. Schematic description of accuracy and precision. produces accurate and repeatable results.
☞
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