18
PHO
TOMETER
7. PHOTOMETER
7.1. COLLECTING & MEASURING REAGENTS AND SAMPLES
Proper Use of Dropper Bottle
(a) For reproducible results, tap the dropper on the table several times and wipe the
outside of the tip with a cloth.
(b) Always keep the dropper bottle in a vertical position while dosing the reagent.
Proper Use of Syringe
(a) Push the plunger completely into the syringe and insert the tip into the solution.
(b) Pull the plunger up until the lower edge of the seal is exactly on the mark for the
desired volume.
(c) 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. Then, keeping the syringe in vertical
position above the cuvette, push the plunger down into the syringe, the desired
volume has been delivered into the cuvette.
