ICS 77.080.01 CCS H 11 T/CS TM 00011E -2021 General rules for original position statistic distribution analysis by laser induced breakdown spectroscopy 激光诱导击穿光谱原位统计分布分析方 法通则 (English Translation ) Issue d by Chinese Society for Testing & Materials ，Zhongguancun Issue d date: 2021-04-16 Implementation date:2021-0 7-16 CSTMhQÆQl^Ou( 全国团体标准信息平台 T/CSTM 00011E-2021 Foreword This document is drafted refer to the rules given in the GB/T 1.1 -2020 (Directives for standardization -Part 1:Rules for the structure and drafting of standardizing documents ) A ttention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This document was proposed by CSTM / FC99 (The integrated field technical committee of Chinese Society for Testing & Materials ). This document is prepared by CSTM / FC99 . This English document was translated by CSTM /FC99 . In case of any doubt about the contents of English translation, the Chinese original shall be considered authoritative. CSTMhQÆQl^Ou( 全国团体标准信息平台 T/CSTM 00011E- 2021 General rules for original position statistic distribution analysis by laser induced breakdown spectroscopy Warning—People using this document should have practical work experience in formal laboratory. In this document , not all possible safety issues are pointed out. The user is responsible for taking appropriate safety and health measures, and ensuring compliance with the conditions stipulated by relevant national laws and regulations. 1 Scope This document specifies a method of original position statistic distribution analysis method by laser induced breakdown spectroscopy. This document includes the terminology, basic principles, general requirements for equipment, samples, analysis procedures, etc. This document is applicable to the standards for original position statistical distribution analysis by laser -induced breakdown spectroscopy to be prepared or revised . 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 14666 -2003 Terms for analytical chemistry GB/T 24213 -2009 General rules for original position statistic distribution analysis method 3 Term s and definitions For the purposes of this document, the terms and definitions given in GB/T 14666 -2003 , GB/T 24213 -2009 and the following apply. 3.1 original position statistic distribution analysis As sample is scanned and excited within the identified analysis area, the spectral signal s corresponding to the analysis position are collected synchronously, and analysed by mathematical statistics methods . The distribution statistic al analysis of the chemical composition s and inclusion s within the area are realized ; 3.2 laser induced breakdown spectroscopy (LIBS) By focusing the pulsed laser on the sample surface, the plasma is formed and the emission spectrums are analyzed to achieve the information of the compositions and content; 3.3 CSTMhQÆQl^Ou(全国团体标准信息平台 T/CSTM 00011E-2021 pulse frequency Number of laser pulses emitted in one second; 3.4 laser burn spot Spots formed by laser excitation on the sample surface; 3.5 line scanning speed Linear velocity of the laser beam which is relative to the sample movement; 3.6 step space Along the scanning direction, the distance between the centers of two adjacent shots; 3.7 row space The distance between the centers of two adjacent lines of shots under line scan mode; 3.8 scanning area Pre-set analysis area on sample ‘s surface ; 3.9