37 Safer Heating for Larger Volumes
DrySyn MAXI and SuperMAXI heating blocks from Asynt provide safe, accurate temperature control for synthesis, distillation and reflux operations when larger volumes (two, three or five litres) are in use.
The safety implications of using an oil bath to heat larger volumes of solvent are fairly obvious, but the frequently used alternative of a heating mantle has its own
problems. The heating elements in these devices often reach temperatures well above the flash point of most common solvents, and a fire involving several litres of solvent would be a serious matter.
Used with a conventional laboratory hotplate stirrer, DrySyn MAXI and SuperMAXI give rapid, safe and controllable heating up to 250ºC with excellent reaction visibility and powerful stirring. The DrySyn MAXI block accommodates any standard 3000ml round-bottom flask, and an insert is provided to adapt the block for 2000ml flasks. The DrySyn SuperMAXI takes a 5000ml flask as standard. Heat-resistant handles on the heating block make for greater safety and convenience when moving these large flasks around the laboratory. Provision is made for a temperature probe should temperature feedback control or monitoring be required.
According to Martyn Fordham, Asynt’s Managing Director, over 25,000 DrySyn laboratory heating and cooling blocks have been supplied world wide since the product was introduced in 2004.
Circle no. 413
Microplate Contamination in Elevated Solvent Boiling
Genevac has announced the availability of the 2009 issue of its informative e-newsletter - Solvent Removal Online.
Accessible as a pdf download the main feature of this issue focuses upon how contaminants from within or upon microplates, can enter the sample solution causing an elevation in the expected solvent boiling behaviour. A series of tests are described that will enable laboratories to check if unexpected elevated solvent boiling temperatures are attributable to microplate contamination.
A case study of
an actual contamination incident is included to illustrate the effect.
The issue also discusses why Genevac recommend 8mbar as the optimum pressure for evaporating water without freezing.
Previous issues of Solvent Removal Online, that contain a host of other useful troubleshooting hints and tips, technical innovations and applications advice, may also be downloaded after a short registration process.
Circle no. 414 Circle no. 415
Automated Filling of Biplates and Pour Plate Functionality
Integra Biosciences has announced several new features and a product range extension expanding the versatility and further improving the reliability of its popular MEDIAJET automated Petri dish filler.
Developed in response to customer feedback the new MEDIAJET now offers the unique flexibility for high throughput filling of Petri dishes of various sizes, Petri dishes with two compartments and test tubes of various diameters and length. Furthermore, an integrated shaker function provides a convenient solution for pour plate applications.
For many applications, the amount of required agar can be reduced by using two-compartment Petri dishes. However, pouring biplates by hand is time-consuming and inefficient. With the MEDIAJET biplate option users have an efficient and reliable solution to fill two-compartment Petri dishes automatically. A new MEDIAJET shaker function enables the automation of pour plate production. Depending on the volume or viscosity of the medium used for pouring, different shaking levels are selectable according to requirements. Furthermore, a new special Petri dish processing mode has been implemented that allows generation of agar dishes with highly planar surfaces. Designed to incorporate seamlessly into IQ/OQ certified environments - the new MEDIAJET provides facility, via an optional inkjet printer module, to automatically imprint Petri dishes with all the relevant data on either the side or bottom of plates to ensure complete traceability.
The MEDIAJET vario Petri dish filler can be converted from filling 90mm diameter dishes to 60mm or 35mm diameter dishes in less than 5 minutes. Using a proven mechanical dish guidance system, monitored by a set of sensors throughout the filling process, the compact MEDIAJET provides truly reliable, walk-away operation. Operational downtime and media loss due to 'dish jams' resulting from variations in the diameter, shape and rim profile of the disposable plastic Petri dishes are completely eliminated.
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LAB ASIA - NOVEMBER/DECEMBER 2009 - LABORATORY PRODUCTS
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