Thermogravimetric analysis container, sample

Thermogravimetric analysis (TG) under oxidizing atmosphere reveals a high-temperature exothermic weight loss of 1.5 wt.% for the TEA sample, compared to 6.6 and 9.3 wt.% for TPA and TBA nanoslabs, respectively. From IR and TG it is concluded that nanoslabs are formed in presence of TEA, but the lower TEA content and the lower intensity of the double five-ring vibration indicate that the solid contains also less structured silica. 

SO2 removal experiments with CEB were performed in a thermogravimetric analysis (TGA) set-up to simulate the process during its combustion. The sample was first heated in a mixture of 70% CO2 in N2 to produce CaCOj, followed by the decomposition of CaCOj to CaO under N2 and O2. This calcined material was sulfated using a mixture containing 3000 ppm SO2, 12% O2, and the balance N2. 

Lu et also applied the same non-covalent functionalization approach to the purification of SWNTs. A water-soluble pyrene derivative 1-pyreneacetic acid was used to solubilize the purified (typical nitric acid treatment) SWNTs in aqueous solution, allowing a nearly complete removal of residual metal catalysts and carbonaceous impurities. According to thermogravimetric analysis (TGA) results, the purified sample of SWNTs contained little other carbonaceous impurities and no more than 3% of residual catalysts by weight... 

A combination of GC/MS with thermogravimetric analysis simplifies analysis because the sample is ran directly from TGA which does not require sample preparation. TGA is interfaced with GC/MS through evolved gas collector which contains primary and secondary desorption elements which supply GC with samples. ... 

Normally, the analyses mentioned previously are performed on the residual materials. However, there is nothing to prevent measurements being made on the separated fractions or on condensate materials. In the case of samples containing water, be aware that the condensate will be enriched with water. An interesting approach to the controlled evaporation of materials is to use the combined techniques of thermogravimetric analysis and infrared. Although this technique is typically used for the determination of thermal decomposition products, it may also be used for controlled and reproducible selective removal of volatile components, with on-line monitoring of the volatile components. 

When a compound crystallizes from solution, the crystals may contain solvent of crystallization. The compound is then called a solvate, and if the solvent is water, the compound is a hydrate. The presence of the solvent is revealed by elemental analysis, and thermogravimetric analysis (TGA) shows whether the solvent molecules are loosely or strongly bound in the crystal lattice. More generally, TGA is used to investigate the thermal degradation of inorganic compounds or polymers or the gas uptake of a solid (e.g. H2 uptake by WO3). A TGA instrument is able to simultaneously heat (at a constant rate) and record the mass of a sample. Samples are usually heated in air or N2, or in an... 

FIGURE 9.25 Thermogravimetrical analysis of a neat epoxy sample (DGEBA cured with diaminodiphenyl sulfone) and a nanocomposite containing 5 wt% LDH modified with 3-aminobenzenesulfonate. Reprinted (From Ref. 40, copyright 2005, Elsevia-, with permission.)... 

The resin produced by PCR contains a large amount of organic material that must be totally eliminated for obtaining the perovskite. In this sense, the thermogravimetric analysis is performed in order to identify the sample decomposition temperature and thus can be properly infer the calcination temperature of the polymeric precursor. 

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