8
TIPS FOR AN ACCURATE MEASUREMENT
The instructions listed below should be carefully followed during testing to ensure most accurate results.
COLLECTING AND MEASURING SAMPLES
• In order to add the exact amount of sample or liquid reagent to the reagent vials it is strongly
recommended to use the available Hanna automatic fixed-volume pipettes or class A laboratory pipettes
(symbolized like a generic pipette tip in the following method related chapters):
pipette code
volume
HI 731340
200
µ
L
HI 731341
1000
µ
L
HI 731342
2000
µ
L
For correct use of the automatic pipette, please follow the related Instruction Sheet.
Alternatively, the optional
HI 740142
1 mL graduated syringe or
HI 740226
5 mL graduated syringe
can be used. For the correct use of the syringes, see instructions below.
1.
In order to measure exactly 5 mL of reagent with the 5 mL 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 5 mL mark
(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, if so eliminate them. Then, keeping the syringe in vertical position above
the vial, push the plunger completely down into the syringe. Exactly 5 mL has been added to the vial