Work
Preparation of sample of birch leaves for analysis
Selected birch leaves had been dried with the limited sunbeam hit before the laboratorial samples were created. After that the sample was divided into two parts. The first part had being dried in desiccator till moisture completely removed. That part was called a clean leaf. The second part had left without changes. This part was called a dirty leaf. Then dried leaves were cut into very small parts about 1 mm with the pair of scissors. The six sample’s masses of 5 grammas were taken from the material of the sample after cutting and another mass was left without changes. And the others were being grinded with spirits into the agnatic mortar during 5, 10, 15, 20 and 30 minutes accordingly.
The radiators were prepared by pills’ pressing at a substrate of boron acid in a special press-form.
Two grammas of materials were taken for 1 pill. So from each sample mass 2 pill-radiators were gotten. After that Co-lines of Zn and Mn activity was measured from each pill.
