第一段:背景知识介绍
陕西师范大学环境学院老师需要做木头的实验,要求是要将木质部研磨成粉末状,然后通过稳定同位素的方法测木头里面的重金属及年轮。一般情况下,杉木(冷杉、云杉、柏树)的木质结构松脆,采用上海净信多样品组织研磨仪研磨钢罐容易研磨,但是老师要去除重金属对样品的污染影响,采用塑料罐进行试验。
(附上样品图片)
第二段:描述一下样品研究原理
杉木(冷杉、云杉、柏树)的木质结构松脆,用钢珠及钢罐非常容易研磨,要去除重金属对样品的污染影响,采用陶瓷珠和塑料罐进行实验。还是同样的原理,把样品和陶瓷珠加入塑料罐中,放入仪器中,设置频率和时间,然后研磨。
第三段:样品具体研磨方法
实验步骤:
步骤1:样品和研磨塑料罐
步骤2 :将样本放入塑料罐中,然后再将塑料罐放入净信研磨仪上,
步骤3:设置参数研磨频率,时间就可研磨成粉状,
步骤4:从净信研磨仪上取出样本,将塑料罐打开倒出样品。
实验结果(放前后研磨对比图)
研磨后的粉状样本,研磨细度可以满足实验要求。
注意:样品必须在冻干机中冻干几小时以上,要不然研磨的时候木头中的纤维不易研磨粉碎,且木质部中的油脂容易粘贴在研磨罐壁和研磨珠上,不易清理下来回收样品。
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