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38
MEASUREMENT PROCEDURE
Before starting to use the reagent kit it is recommended
to read carefully all the instructions and the Health &
Safety Data Sheet (HSDS). Pay particular attention to all
warnings, cautions and notes. Failure to do so may result
in serious injury to the operator.
Reagent Blank Correction
: This method needs a reagent blank
correction. A single blank vial may be used more than once; the blank
vial is stable up to one week if stored in a dark place at room temperature.
Always use the same lot of reagents for blank and samples. For most
accurate measurement run a blank for each set of measurements.
•
Preheat the Hanna Reactor C 9800 to 105 °C (221°F). For correct
use of the reactor follow Reactor Instruction Manual.
Use of the optional HI 740217 safety shield is strongly recommended.
Do not use an oven or microwave because leaking samples can
generate a corrosive and possibly explosive atmosphere.
• Remove the cap from two Digestion Vials (
green
cap vials).
• Add the content of one packet of Potassium Persulfate for Total
Nitrogen analysis to each vial.
• Add exactly 2.0 mL of sample to one vial (sample vial), and 2.0
mL of deionized water to the other vial (blank vial), while keeping
the vials at a 45-degree angle.
←
green cap
→
Nitrogen, Total LR
43
MEASUREMENT PROCEDURE
Before starting to use the reagent kit it is recommended
to read carefully all the instructions and the Health &
Safety Data Sheet (HSDS). Pay particular attention to all
warnings, cautions and notes. Failure to do so may result
in serious injury to the operator.
Reagent Blank Correction
: This method needs a reagent blank
correction. A single blank vial may be used more than once; the blank
vial is stable up to one week if stored in a dark place at room temperature.
Always use the same lot of reagents for blank and samples. For most
accurate measurement, run a blank for each set of measurements.
•
Preheat the Hanna Reactor C 9800 to 105 °C (221°F). For correct
use of the reactor follow Reactor Instruction Manual.
Use of the optional HI 740217 safety shield is strongly recommended.
Do not use an oven or microwave because leaking samples can
generate a corrosive and possibly explosive atmosphere.
• Remove the cap from two Digestion Vials (
red
cap vials).
• Add the content of one packet of Potassium Persulfate for Total
Nitrogen analysis to each vial.
• Add exactly 0.5 mL of sample to one vial (sample vial), and 0.5
mL of deionized water to the other vial (blank vial), while keeping
the vials at a 45-degree angle.
←
red cap
→
Nitrogen, Total HR