GB/T 6948-1998煤的镜质体反射率显微镜测定方法.pdf

ics73.040 D 26 崛黔 中 华 人 民 共 和 国 国 家 标 准 cB/T6948-1998 eqvISO7404-5:1994(E) 煤的镜质体反射率显微镜测定方法 microscopicaldeterminationof thereflectanceofvitrinitein coal 1998一12一08发布 1999一05一01实施 国家 质 量 技 术 监 督 局 发布 GB/T6948一门998 目 次 前言 ··‘···“·“·”····.，·····” “··“····，·······“·“·“···，··，··，，····“··“·······，··.·，，“··········”···，·一· I ISO7404前言，·一 I 1 范围 ···。“·························································”·························‘·，····，············…… 1 2 引用标准 ···。···········································································“····················…… 1 3 定义 ····························，···，··························，···········.，·，····················”·”···…… 1 4 原理 “··········，···· ········，········“····“···，·····················”··················”·，··”.·，一 1 5 材料 ·····”··….… 1 6 仪器 ·······，······“·”····“·····”·························””··········“·············”·”… .，······“”·2 7 样品制备 ，’，········”·············“····“·················”···········“····”·········”····“······…… 5 8 测定步骤 .·5 9 结果表述 ························，，··················。···························，，···”·”·····“············”·”一 8 10 精密度9 n 试验报告”一 9 附录A(提示的附录、镜质体反射率测定结果报告 ··············，····“····”·······“················一· 11 附录B(提示的附录) 煤的镜质体平均最大反射率和平均随机反射率的关系式 ··················“·… 11 GB/T6948一 1998 前 言 本标准是根据国际标准化组织的ISO7404-5:1994(E)烟《煤和无烟煤的煤岩分析方法第5部分: 镜质体反射率的显微镜测定方法》，对GB/T6948-1986进行修订的。在编写规则上与该国际标准等 同，在技术内容上与之等效。 本标准在技术内容上与国际标准ISO7404-5:1994(E)有如下差异: a)本标准 “1范围”中不包括混合煤的反射率测定; b)本标准，5.2校准用标准物质”中推荐了国家质量技术监督局批准的 “显微镜光度计用反射率标 准物质”共6种，比ISO7404-5中推荐的标准物质少两个品种; 。)