invert to mix
• 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 VIALS
• Never insert hot vials in the instrument, the vial holder may become damaged.
• In order to avoid reagent leaking and to obtain most accurate results, it is recommended to close the
vial tightly with the supplied cap after addition of reagents or sample.
• Shaking the vial can generate bubbles in the sample, causing higher readings. To obtain accurate
measurements, remove such bubbles by swirling or by gently tapping the vial.
• Proper mixing is very important for reproducibility of the measurements. The right way of mixing a vial
is specified for each method in the related chapter.
(a) invert the vial a couple of times or for a specified time: hold the vial in the vertical position with the
cap up. Turn the vial upside-down and wait for all of the solution to flow to the cap end, then return
the vial to the upright vertical position and wait for all of the solution to flow to the vial bottom. This
is one inversion. The correct speed for this mixing technique is 10 complete inversions in 30 seconds.
This mixing technique is indicated with “invert to mix” and the following icon:
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