1　概述呼吸性粉尘危害程度分级的主要理论基础是粉尘对机体的毒性强度 ,而粉尘毒性的检测分析则是确定其毒性强度的重要依据之一。现代基础科学的飞速发展 ,不但为研究粉尘的危害提供了许多新的技术手段 ,而且也为认识和评价粉尘的毒性开阔了视野并展现了良好的前景。近些年来 1 Overview The main theoretical basis for grading the degree of hazard of respirable dust is the toxic strength of dust on the body, while the detection and analysis of dust toxicity is one of the important basis to determine the toxicity intensity. The rapid development of modern basic science not only provides many new technical means for studying the harm of dust, but also broadens the field of vision and shows good prospects for understanding and evaluating the toxicity of dust. In recent years