<?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">evolved gas analysis</topic></authority><related type="broader"><topic>mass spectrometry</topic></related><variant type="other"><topic>EGA</topic></variant><variant type="other"><topic>analysis, evolved gas</topic></variant> <note xml:lang="en"><![CDATA[ Evolved gas analysis (EGA) is a technique whereby temperature-resolved, volatile species generated from a sample placed within a microfurnace are analyzed using mass spectrometry. It is the most useful technique to determine the nature and amount of volatile products formed during the thermal degradation of materials. ]]></note></mads>