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The terms selectivity and specificity are often used interchangeably, the term specific generally refers to a method that produces a response for a single analyte only, while the term selective refers to a method that provides responses for a number of chemical entities that may or may not be distinguished from each other. If the response is distinguished from all other responses, the method is said to be selective. Since there are very few methods that respond to only one analyte, the term selectivity is usually more appropriate Selectivity and specificity are measures of the reliability of measurements in the presence of interferences. Where the measurement stage. | GASTRITIS AND GASTRIC CANCER - NEW INSIGHTS IN GASTROPROTECTION DIAGNOSIS AnD TREATMENTS Edited by Paola Tonino INTECHWEB.ORG Gastritis and Gastric Cancer - New Insights in Gastroprotection Diagnosis and Treatments Edited by Paola Tonino Published by InTech Janeza Trdine 9 51000 Rijeka Croatia Copyright 2011 InTech All chapters are Open Access articles distributed under the Creative Commons Non Commercial Share Alike Attribution 3.0 license which permits to copy distribute transmit and adapt the work in any medium so long as the original work is properly cited. After this work has been published by InTech authors have the right to republish it in whole or part in any publication of which they are the author and to make other personal use of the work. Any republication referencing or personal use of the work must explicitly identify the original source. Statements and opinions expressed in the chapters are these of the individual contributors and not necessarily those of the editors or publisher. No responsibility is accepted for the accuracy of information contained in the published articles. The publisher assumes no responsibility for any damage or injury to persons or property arising out of the use of any materials instructions methods or ideas contained in the book. Publishing Process Manager Martina Blecic Technical Editor Teodora Smiljanic Cover Designer Jan Hyrat Image Copyright Sebastian Kaulitzki 2010. Used under license from Shutterstock.com First published September 2011 Printed in Croatia A free online edition of this book is available at www.intechopen.com Additional hard copies can be obtained from orders@intechweb.org Gastritis and Gastric Cancer - New Insights in Gastroprotection Diagnosis and Treatments Edited by Paola Tonino p. cm. ISBN 978-953-307-375-0 ikrrr iJ OPEN ACCESS INI Cvn PUBLISHER INTECH open free online editions of InTech Books and Journals can be found at .
