Cuvette Preparation
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6.3. COLLECTING & MEASURING SAMPLES AND REAGENTS
Proper Use of Powder Packet
1. Use scissors to open the powder packet.
2. Push the edges of the packet to form a spout.
3. Pour out the content of the packet.
Proper Use of Dropper Bottle
1. Tap the dropper on the table several times.
Wipe the outside of the tip with a cloth.
2. Always keep the dropper bottle in a vertical position
while dosing the reagent.
Proper Use of Syringe
1. Push the plunger completely into the syringe and insert the tip into
the solution.
2. Pull the plunger up until the lower edge of the seal is exactly on the
mark for the desired volume.
3. Take out the syringe and clean the outside of the syringe tip, be sure
that no drops are hanging on the tip of the syringe.
4. Keep the syringe in a vertical position above the cuvette and then
push the plunger down into the syringe to deliver desired volume
into the cuvette.
Proper Use of Minipipette
1. Attach the pipette tip.
2. Press the button down to the first stop.
3. Immerse the pipette tip in the liquid approximately 2‑3 mm.
4. Slowly let the button move back to original position, wait 2 seconds.
5. Remove the pipette tip from the liquid.
6. To dispense the liquid, place pipette tip on container inside wall.
7. Slowly press button down to first stop.
8. Wait until all of the liquid has been dispensed.
9. Press button down to second stop, this will allow any remaining liquid
to be dispensed.
6.4. CUVETTE PREPARATION
Proper mixing is very important for reproducibility of the measurements.
• The mixing technique for each method is listed in the method procedure.
• In order to avoid reagent leaking and to obtain more accurate measurements, close
the cuvette first with the supplied HDPE plastic stopper
and then the black cap.
