1 1
2
Figure S1. Technical drawing (lateral view) of a dividable hollow sphere cut out of stainless 3
steel (V4A/1.4571) for grinding of concentrated and freeze-dried sediment trap samples. The 4
sphere consists of two hollow hemispheres, which are only connected by two guide pins and 5
sealed by a metal sealing. All physical dimensions are given in millimeters. In this case, the 6
inner radius was 22.5 mm corresponding to a volume of about 47.7 mL.
7
69.5 52 22
27 7
R = 22.5
45°