Ryan Johnsson

In TGA, the sample is heated at a controlled rate or kept at a controlled temperature while its mass is weighed with an extremely precise scale. The analysis provides information about phase transitions, absorption, adsorption, desorption, chemisorption, thermal decomposition, and solid-gas reactions. It can also be used as a material characterization and compositional analysis method. As a result of the measurement, you will get the change in mass as a function of temperature and time. A simultaneous thermal analysis (TGA + DSC) can be performed upon request. The heating cycle can be tailored to your sample, with temperature ranges from 25 °C to 1100 °C and various options for the surrounding gas atmosphere (synthetic air and N₂). Please disclose the aim of the measurement and the desired temperature program and atmosphere(s) upon requesting a quote.

Determination of the water vapor transmission rate (WVTR) according to the ASTM F1249 standard. WVTR describes the amount of water vapor that passes through a material over a set period. It is an important quality indicator in food and cosmetics packaging, as an effective moisture barrier is critical to keeping products fresh and preventing spoilage. In this WVTR test, two samples per material are measured simultaneously to ensure the reliability of the measurement. The results are expressed as g/m²/day. Please disclose the desired temperature (from 15 to 50°C) and the desired relative humidity (from 35% to 90%) when placing the order. This measurement is applicable for plastic films and sheeting materials with WVTR values between 0.005 and 2000 g/m²/day. If you wish to test finished packaging instead, check out the WVTR measurement for packages.

Qualitative identification of chemical groups in solid samples by Attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR). Results will be delivered as an FTIR spectrum. In addition, a comparison to an FTIR library will be provided. The method is not quantitative, but it can be used to identify the main chemical components of the sample.

Determination of the oxygen transmission rate of plastic films and sheet-like materials. The test is performed on two parallel samples simultaneously. Measurement conditions (temperature and relative humidity) can be chosen according to the intended use of the material. Oxygen permeability is typically measured at 23 °C and 0% relative humidity as per standard ASTM D3985. In moist conditions, for example at 38 °C and 90% relative humidity, standard ASTM F1927 is used. Please disclose the desired temperature (from 15 °C to 50 °C) and relative humidity (either 0% or 10% to 90%) upon requesting an offer. This measurement is suitable for materials with OTR values between 0.01 and 5000 cm3/(m2 * day).