Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM C791-04
• Năm ban hành / Publication date: 2004
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Boron Carbide
• Số trang / Page: 23
• Phạm vi áp dụng / Scope of standard: 1.1 These test methods cover procedures for the chemical, mass spectrometric, and spectrochemical analysis of nuclear-grade boron carbide powder and pellets to determine compliance with specifications.1.2 The analytical procedures appear in the following order:SectionsTotal Carbon by Combustion and Gravimetry7-17Total Boron by Titrimetry18-28Isotopic Composition by Mass Spectrometry29-38Chloride and Fluoride Separation by Pyrohydrolysis39-45Chloride by Constant-Current Coulometry46-54Fluoride by Ion-Selective Electrode55-63Water by Constant-Voltage Coulometry64-72Impurities by Spectrochemical Analysis73-81Soluble Boron by Titrimetry82-95Soluble Carbon by a Manometric Measurement96-105Metallic Impurities by a Direct Reader Spectrometric Method106-114