STEP 1 – HOW MANY APPLICATIONS AND OPERATORS ARE PLANNED?
Caluire, France — With any scientific instrument there is of course a compromise between performance and ease of use. The highest sensitivity instruments require skilled users and time for sample preparation. The same is of course true for TGA systems;
Top-loading TGA systems (like the LABSYS evo) are designed for labs where there are a high number of users with varying experiments. They feature good performance, but the design also enables for rapid and simple sample loading and a coupling system that can be utilized in seconds.
Other systems will offer enhanced performance, but the training required by the operator is typically more. So further consideration is needed, and you should start by understanding that any TGA system is built up of four main components, consider them individually because the selection of each will determine the final solution and ultimately the system that is right for you.
Take some time to take a look at the balance.???? Analytical balances are designed to deliver precise mass measurements in a few seconds.?? However, all TGA experiments take place over hours, and in some cases over days.?? As such, the key variable on balance performance is not detection limit, but drift over time.
STEP 2 – WHAT KIND OF BALANCE????
Just as important is to consider the sample type, and expected mass loss.?? These are typically the expected mass and mass change of your sample.???? A balance that is designed to measure small mass changes is not the same as one that can take a large sample with large mass changes.
All Setaram balances are designed to measure mass changes over long periods of time but there are currently four completely different balances in the Setaram range, and ??? for example ??? these can take typical samples sizes from 50mg all the way to 100g.
STEP 3 – WHAT ABOUT THE ATMOSPHERE CONTROL????
Atmosphere control is also an obvious, but important feature to study when considering a TGA. All TGA use a combination of inert and active gas. But do you need vacuum, do you need controlled humidity, do you need corrosive gases, reducing gases or even hazardous gases?
Top loading systems are capable to tolerate 90% of all vacuum applications and some active gases but are not suited to aggressive and corrosive atmospheres. Systems such as theSETSYS Evolution feature sophisticated gas control systems and have options for corrosive gases and even high humidity gases. There is also an available option that allows for operation under 100% H2 and other flammable gases.
See more on theSETSYS Evolution
STEP 4 – LAST POINT ON THE FURNANCE
The next component to consider is the furnace itself. Is it capable of performing all your experiments now, and into the future? Then consider the size of the homogenous temperature zone, related to your sample, is the control thermocouple optimized for your temperature range and can you change it ?
Finally, the software is your interface between the sample and the data. Does it do everything you need it to do ??? for example exporting graphs and data into papers and publications is almost essential in today???s laboratory.
However, consider something as simple as important your existing data so you can overlap historical data with new data, different and simple baseline operations, integrations and blank subtractions. Today some systems do not give you raw data, but data that has been treated to give artificially flat baselines and do not allow for peak separations.
All of these functionalities are really important for your day-to-day operations.
To learn more visit: http://www.setaram.com
SETARAM Instrumentation (Caluire, France) is a leading manufacturer and supplier of high-performance thermal analyzers, calorimeters, gas sorption and high pressure mass spectroscopy instruments and offers complete and dedicated solutions for different applications such as Pharmaceuticals & Life Science, Advanced Materials, Energy, Process Safety, etc.
Caluire – France
Phone +33(0)4 72 10 25 25
Hillsborough, NJ – USA
Phone +1(908) 262 7060