LaMotte PQ-80 - Manual (Page 2)

7. The green taped syringe is the Titrator. Depress the plunger of the
syringe to expel air. To fill the Titrator, insert the titrator tip into
the center hole of the titration solution bottle, invert the solution
bottle (Figure A) and slowly withdraw the plunger until the bottom
of the plunger is opposite the zero mark on the scale (Figure B).
NOTE:
A small air bubble may appear in the Titrator barrel. Expel
the bubble by partially filling the barrel and pumping the titration
solution back into the inverted solution bottle. Repeat this
pumping action until the bubble disappears.
Next, turn the bottle right-side-up and remove the Titrator.
8. While gently swirling the tube, slowly press the plunger to titrate
until the brown color changes to a green color with no trace of
brown (Figure C). Record the number from the titrator scale
(Figure D).
9. Divide 295 by the number on the scale to obtain dip tank strength.
For example, if the titrator reads 0.98, then:
295 divided by 0.98 = 301
This solution is 1 gallon PQ-80 per 301 gallons of water
NOTE: For those solutions which are stronger than 1:285, it will be
necessary to refill the titrator in order to achieve color change. If this is
done, please remember to add the number of full titrators used to the
final titrator reading before calculating solution strength.
Always rinse well with clean water after each test.
SAFETY PRECAUTIONS
A.
Read all instructions to familiarize yourself with the test procedure
before you begin. Note any precautions in the instructions.
B. Read the label on each reagent container prior to use. Some
containers include precautions notices and first aid information.
C. Keep all equipment and reagent chemicals out of reach of children.
D. In the event of an accident or suspected poisoning, immedicately
call the Poison Center phone number in the front of your local
telephone directory or call your physician. Be prepared to give the
name of the reagent in question and its code number.
PROTECT YOURSELF AND YOUR EQUIPMENT:
USE PROPER ANALYTICAL TECHNIQUES
A.
Avoid contact between reagent chemicals and skin, eye, nose, and
mouth.
B. Wear safety goggles or glasses when handling reagent chemicals.
C. Use the test tube caps or stoppers, not your fingers, to cover test
tubes during shaking or mixing.
D. When dispensing a reagent from a plastic squeeze bottle, hold the
bottle vertically upside-down (not at an angle) and gently squeeze it
(if a gentle squeeze does not suffice, the dispensing cap or plug may
be clogged).
E. Wipe up any reagent chemical spills, liquid or powder, as soon as
they occur. Rinse area with wet sponge, then dry.
F. Thoroughly rinse test tube before and after each test. Dry your
hands and the outside of the tube.
G. Tightly close all reagent containers immediately after use. Do not
interchange caps from different containers.
H. Avoid prolonged exposure of equipment and reagents to direct
sunlight. Protect them from extremely high temperatures and
protect them from freezing.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
0.1
1.0
0.9
0.98 ppm
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0.8
Figure A Figure B
Figure C Figure D