<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31317443</termId><termName>time-of-flight mass spectrometry</termName><termType>PT</termType><termNote><![CDATA[ A surface-sensitive mass spectrometry technique in which an ion's mass-to-charge ratio is determined by a time measurement. Particles removed from the atomic monolayers of a surface are accelerated into a flight tube and their mass is measured by the time it takes them to reach the detector. ]]></termNote><termCreatedDate>2026-03-30 20:25:28</termCreatedDate><relation><relationType>UF</relationType><termId>31317444</termId><termName>TOF-MS</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31317445</termId><termName>TOF/MS</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31317446</termId><termName>spectrometry, time-of-flight mass</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31304443</termId><termName>mass spectrometry</termName><termType>PT</termType></relation></term>  </Zthes>