Poulin, Jennifer published the artcileDirect Inlet Py-GC-MS analysis of cultural heritage materials, Quality Control of 929-77-1, the main research area is inlet PyGCMS analysis cultural heritage material.
Pyrolysis-gas chromatog.-mass spectrometry (Py-GC-MS) is an invaluable tool in the anal. of cultural heritage materials, particularly those containing complex polymerized components, whether natural or synthetic in origin. As the field embraces non-destructive and micro-sampling anal., it is not always possible to perform traditional flash Py-GC-MS due to the sample size requirements of the technique, which are typically in the range of 50-100 μg. The development of a pyrolysis method using a Thermal Separation Probe (Agilent Technologies Inc.) has allowed for splitless Py-GC-MS anal. to be carried out on much smaller samples. This technique makes use of a multi-mode inlet that is capable of rapidly heating to 450 °C. Because pyrolysis takes place within the inlet, the methodol. has been designated Direct Inlet Pyrolysis (DIP). Examples of synthetic reference materials, as well as case studies of archaeol. residues and a varnish from the 1960 s were employed to demonstrate this adapted anal. technique. The results obtained using DIP-GC-MS were compared to published thermal degradation data and higher-temperature flash Py-GC-MS chromatograms. The results indicate that DIP-GC-MS can characterize the organic fraction of complex polymeric samples. Differences in pyrolyzate formation and relative abundance occur for some polymers which are caused by lower and prolonged pyrolysis conditions. The technique can be performed in splitless mode with just a few micrograms of precious sample from cultural heritage objects, or by employing a low split if desired for more abundant reference materials. Like other Py-GC-MS methods, the online use of a reagent such as tetramethylammonium hydroxide (TMAH) allows for the derivatisation of polar functional groups.
Journal of Analytical and Applied Pyrolysis published new progress about Acetylation. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Quality Control of 929-77-1.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics