24 analytical & laboratory EquipmEnt
an alternative to improve pipette accuracy management
t
here is increasing need for a simple it is essential that high-precision weighing volumetric range is to be measured.
means to verify the accuracy of pipette instrument be used. as a manufacturer of Finally, special software facilitates
volumes by oneself. until now, some pipette electronic balances, a&D thus decided to test and data management. the software
users have relied on outside contractors develop pipette accuracy testers, whose automatically converts mass values
to have their pipettes calibrated regularly, advantages are also characterised by the into volumetric values using the liquid
incurring substantial costs. Some perform following three features. temperature and barometric pressure
accuracy tests by themselves, which is Firstly, a&D’s pipette accuracy testers previously entered, and compares the
often laborious and error-prone without are equipped with a device called the accuracy and the repeatability with
adequate apparatus. others may never have ‘evaporation trap’. one of the difficulties iSo8655 or any other set specifications to
seriously thought that their pipettes could in weighing a small quantity of liquid is judge whether the pipette is acceptable or
be inaccurate. However, even such users controlling the environment to minimize not. it is also possible to save and load the
are now facing the global movement toward errors due to loss of evaporation. the test results as well as print them out in a
a stricter pipette accuracy management. evaporation trap maintains high humidity report format.
one of the factors propelling this inside and prevents evaporation of the test a&D’s pipette accuracy tester has
movement is the advent of iSo8655 in liquid. it is no longer necessary to set up one additional benefit. it is a known fact
2002 as a guideline for determining and adjust the humidity of an entire room. in that human factors often contribute more
pipette accuracy, with which more and addition, the evaporation trap can function to erroneous measurements than the
more pipette users are starting to comply. as a breeze break to shield the balance from pipette accuracy itself. by visualising
iSo8655 recommends a test procedure air draft to ensure stable weighing. the dispensed volumes and repeatability,
based on what is known as the ‘gravimetric Secondly, the balance and the other pipette accuracy testers can be used as a
method’, the most common way of knowing devices can all be packed into a portable good training tool for a novice to become a
the performance of variable-volume carrying case. this will prove useful skilled pipette user. u
pipettes. in the gravimetric method, pipette when performing on-site tests at distant
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volume is determined based on the mass places. a balance can be selected from
value of distilled water dispensed from the three models with different resolutions: A&D Company, Limited is based in
pipette (1mg equals to approximately 1µl). 0.01mg, 0.1mg or 1mg, depending on what Toshima-ku, Tokyo, Japan. www.aandd.jp
Dispensers for cleanrooms
Enhancing low volume SpE
W
ith hygiene at the forefront of worktops in all types of laboratories, the
assays
the demanding needs within trespa toplabpluS is an easy to clean,
cleanroom and laboratory environments, impervious, durable self supporting
teknomek has designed a range of flat panel, resistant to most p
orvair Sciences ltd has announced a
range of bioVyon c18 silica columns
dispensers. aggressive chemicals, that and microplates for use in low volume
these dispensers are can be fitted to teknomek solid phase extraction (SpE) assays.
manufactured 304 quality stainless steel tables packed bed SpE columns and
stainless steel, and have and an extended range of microplates traditionally perform
been custom designed for workstations. relatively inefficiently when using the
the distribution of industry teknomek also offers shallow sorbent beds necessary to get
specific cleanroom wipes, a variety of non stainless good recovery from smaller sample
disposable coveralls or steel products, such as volumes. by immobilising the c18 sorbent
individually packed sterile specialist matting suitable within the porous bioVyon polymer –
gloves, for the effective use to remove foot borne and porvair have created a novel, high surface
within sanitary working wheel borne contamination. area matrix that provides unmatched
areas. teknomek’s newly control of flow rate.
With the current redesigned online catalogue bioVyon c18 is initially being offered
awareness of health and has details on these products, in 96-well microplates as a 10mg per well
safety within the work place, and more, with the added benefit of loading suitable for low volume bioassay
teknomek has manufactured a 316 industry specific categories for ease when preparation and clean-ups. in the popular
quality wall or free standing, lockable searching for the relevant products. u 1ml cartridge format, bioVyon c18 is
sharps bin, ideal for the safe disposal of available in a choice of 12.5, 25 and 50mg
Enter 24a or ✔ at www.scientistlive.com/elab
sharp, and possibly contaminated objects, loadings to suit your application. u
such as syringes. Teknomek Industries Ltd is based in
Designed especially to hygienically Norwich, Norfolk, UK. For more information, visit
protect and stop contamination of www.teknomek.co.uk www.porvair-sciences.com
www.scientistlive.com
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