<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">pyrolysis-gas chromatography-mass spectrometry</topic></authority><related type="broader"><topic>gas chromatography-mass spectrometry</topic></related><variant type="other"><topic>Py-GC/MS</topic></variant> <note xml:lang="en"><![CDATA[ A method of chemical analysis in which a small sample of material is inserted into a pyrolysis unit before subsequently analyzed using the techniques of gas- chromatography and mass spectrometry in tandem. This method enables a reproducible characterisation of the macromolecular complexes found in virtually all materials in the natural environment. ]]></note></mads>