Hanna Instruments HI 83208 - Manual (Page 9)

9
• Proper use of the powder reagent packet:
(a) use scissors to open the powder packet;
(b) push the edges of the packet to form a spout;
(c) pour out the content of the packet.
USING CUVETTES
• Proper mixing is very important for reproducibility of the measurements. The right way of mixing a
cuvette is specified for each method in the related chapter.
(a) invert the cuvette a couple of times or for a specified time: hold the cuvette in the vertical position with
the cap up. Turn the cuvette upside-down and wait for all of the solution to flow to the cap end, then
return the cuvette to the upright vertical position and wait for all of the solution to flow to the cuvette
bottom. This is one inversion. The correct speed for this mixing technique is 10-15 complete inversions in
30 seconds.
This mixing technique is indicated with “invert to mix” and the following icon:
(b) shaking the cuvette, moving the cuvette up and down. The movement may be gentle or vigorous.
This mixing method is indicated with “shake gently” or “shake vigorously”, and one of the following
icons:
shake gently shake vigorously