<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31341368</termId><termName>optical emission spectroscopy</termName><termType>PT</termType><termNote><![CDATA[ Emission spectroscopy technique used to determine elemental content of materials. The material is heated to a high temperature causing the electrons in the sample to emit light which is converted into a spectral pattern. In the broader sense, optical emission spectroscopy includes ICP optical emission spectrometry, which uses an inductively coupled plasma as the excitation source. ]]></termNote><termCreatedDate>2026-03-30 20:32:03</termCreatedDate><relation><relationType>UF</relationType><termId>31341369</termId><termName>OES</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31341370</termId><termName>optical emission spectrometry</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31341371</termId><termName>spectroscopy, optical emission</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31317311</termId><termName>emission spectroscopy</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31372152</termId><termName>glow discharge optical emission spectrometry</termName><termType>PT</termType></relation></term>  </Zthes>