论文部分内容阅读
这种改进的用于石棉纤维计数的滤膜技术称为DMF/E方法。这种技术所用的材料和方法如下:将含有7份二甲基甲酰胺、3份乙酸和10份水的透明液滴在载物玻片上,将直径为25 mm采有石棉纤维的纤维素酯滤膜剪开,一半置于透明液上,然后将载物片放在调温加热板上加热,65℃、15分钟,直到透明液蒸发。取下载物片,放置两个金的透射电子显微镜(TEM)格片(200目)于透明的滤膜上,用镊子轻轻按压,分别滴一滴Euparal树脂于每一
This improved membrane technology for asbestos fiber counting is known as the DMF / E method. The material and method used for this technique are as follows: A clear liquid drop containing 7 parts of dimethylformamide, 3 parts of acetic acid and 10 parts of water is placed on a slide glass and a 25 mm diameter asbestos fiber- Filter cut, half placed in a transparent solution, and then the slide was placed on the heating plate heating, 65 ℃, 15 minutes until the transparent liquid evaporated. Remove the slide and place two gold transmission electron microscopy (TEM) grids (200 mesh) on a clear filter. Gently press with tweezers and drop a drop of Euparal resin on each