OSMOMAT 050 User Guide
Page 17 of 51
Version 1.1 (2011-10-12)
4.2 Ringer's Solution as Solvent
The Ringer's solution should be a pure Ringer's electrolyte solution without added lactates or other
substances. If necessary, the solution can be self made.
Sodium chloride
0,8 g
Potassium chloride
0,02 g
Calcium chloride
0,02 g
Sodium bicarbonate
0,1 g
use distilled water to fill up to
100 cm³
In exceptional cases, you can also use an isotonic saline solution with a concentration of
0.9% NaCl
.
The solvent used for preparing the lower half of the measuring cell must not contain any amount of
solved gas/air. If necessary, it must first be degassed by heating up just under the boiling point or by
degassing under vacuum. We recommend using the
30 mL plastic syringe
included in the accessories
for a simple way to degas the solvent
( Figure 4-3).
Figure 4-3: Plastic syringe with tube clamp
Approx. 20 mL of the solvent are aspirated using the connected silicon rubber tube. Next, the tube is
clamped shut using the tube clamp and a vacuum is created by firmly pulling the syringe plunger. The
liquid is shaken and then the tube clamp is opened again. The gas can escape. This operation is re-
peated three to four times to degas the solvent. The degassed solvent is later added to the lower half
of the cell directly from the syringe
(Figure 4-8)
Summary of Contents for OSMOMAT 050
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